{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9852881","patent":{"patent_number":"US-9852881","title":"Scanning electron microscope system, pattern measurement method using same, and scanning electron microscope","assignee":null,"inventors":[],"filing_date":"2014-11-19T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["H01L"],"num_claims":25,"abstract":"In order to allow detecting backscattered electrons (BSEs) generated from the bottom of a hole for determining whether a hole with a super high aspect ratio is opened or for inspecting and measuring the ratio of the top diameter to the bottom diameter of a hole, which are typified in 3D-NAND processes of opening a hole, a primary electron beam accelerated at a high accelerating voltage is applied to a sample. Backscattered electrons (BSEs) at a low angle (e.g. a zenith angle of five degrees or more) are detected. Thus, the bottom of a hole is observed using “penetrating BSEs” having been emitted from the bottom of the hole and penetrated the side wall. Using the characteristics in which a penetrating distance is relatively prolonged through a deep hole and the amount of penetrating BSEs is decreased to cause a dark image, a calibration curve expressing the relationship between a hole depth and the brightness is given to measure the hole depth."},"analysis":{"summary":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** (US-9852881) addresses a critical challenge in advanced semiconductor manufacturing, particularly in 3D-NAND processes: the accurate inspection and measurement of super high aspect ratio holes. Traditional scanning electron microscopes (SEMs) struggle to obtain reliable information from the bottom of these deep, narrow structures, making it difficult to determine if a hole is fully opened or to measure its precise dimensions, such as the top-to-bottom diameter ratio.\n\nThis patent introduces an innovative technical approach. It involves applying a primary electron beam accelerated at a high voltage to a sample. Crucially, it then focuses on detecting low-angle backscattered electrons (BSEs) – specifically those with a zenith angle of five degrees or more. These 'penetrating BSEs' are unique because they originate from the bottom of the hole and travel through its sidewall. By observing these electrons, the system can effectively 'see' and gather data from previously inaccessible depths.\n\nThe core innovation for measurement lies in correlating the characteristics of these penetrating BSEs with hole depth. As a hole becomes deeper, the penetrating distance for these electrons through the sidewall increases, leading to a decreased amount of detectable penetrating BSEs and, consequently, a darker image. This relationship allows for the creation of a calibration curve that expresses the precise relationship between hole depth and image brightness. Using this curve, the system can accurately measure the depth of the hole and verify its opening status.\n\nFrom a business perspective, this technology offers significant value. It enables semiconductor manufacturers to achieve higher yields by ensuring the integrity of critical 3D-NAND structures. It reduces the need for costly and time-consuming destructive testing, accelerating R&D cycles and improving overall production efficiency. The market opportunity is substantial, driven by the continuous demand for denser and more complex memory devices, where precise nanoscale metrology is paramount for quality control and cost-effectiveness. This innovation positions itself as a key enabler for the next generation of microchip fabrication.","layman_explanation":"### What Problem Does This Solve?\nImagine you're building a skyscraper, but instead of floors, you're stacking millions of incredibly thin sheets, each with tiny, perfectly aligned holes drilled through them. These holes are crucial for the building's structure and function. Now, imagine these holes are so deep and narrow that you can't shine a light down to see if they're fully drilled or if the bottom is the right size. This is the exact challenge facing semiconductor manufacturers, especially those producing 3D-NAND flash memory, which powers everything from your smartphone to data centers. If these microscopic holes aren't perfect – if they're not fully open or have incorrect dimensions – the entire chip can fail, leading to massive waste and production delays. Existing inspection methods often involve destroying a sample to cut it open and look inside, which is costly, time-consuming, and can't be done for every chip.\n\n### How Does It Work?\nThis patent, the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope**, provides a brilliant solution without resorting to destructive testing. Think of it like a highly specialized sonar system, but for electrons instead of sound waves. A powerful, focused beam of electrons (like a tiny, super-precise flashlight) is shot down into these deep holes. Instead of listening for echoes, this system 'listens' for specific electrons that do something very clever: they hit the very bottom of the hole, then bounce *sideways* and *through the material* of the hole's wall to escape. These are called 'penetrating backscattered electrons.'\n\nThe magic happens in how these penetrating electrons behave. If a hole is very deep, these electrons have to travel further through the solid material of the sidewall, so fewer of them make it out, and the signal appears 'darker.' If the hole is shallower, more electrons escape, and the signal appears 'brighter.' By precisely measuring this brightness, the system can create a 'calibration curve' – essentially a lookup table that says, 'This brightness means this depth.' It's like having a map that tells you the exact depth of the well just by observing the faint light escaping from its sides, allowing for non-destructive and accurate measurement of critical dimensions and verifying if the hole is fully open.\n\n### Why Does This Matter?\nThis innovation is a game-changer for the multi-billion-dollar semiconductor industry. For companies manufacturing 3D-NAND, it means a direct path to significantly higher manufacturing yields. By accurately verifying the integrity of these critical holes in real-time, manufacturers can catch defects early, reduce scrap, and optimize their processes much more quickly. This translates into substantial cost savings and faster time-to-market for new, more powerful memory chips. In a highly competitive industry where even a fraction of a percentage point increase in yield can mean hundreds of millions of dollars, this technology offers a clear competitive advantage. It also reduces the reliance on slower, more expensive destructive testing methods, streamlining research and development. Investors should see this as a foundational technology that enables the continued scaling and performance improvement of advanced microelectronics.\n\n### What's Next?\nThe immediate application is in 3D-NAND, but the implications extend far beyond. As other industries, such as microelectromechanical systems (MEMS) or advanced packaging, develop increasingly intricate and high-aspect-ratio structures, the demand for this kind of deep, non-destructive inspection will grow. This patent could become a standard tool across precision manufacturing, enabling innovations in new materials and device architectures. For businesses, investing in or adopting this technology ensures they remain at the forefront of quality control and manufacturing efficiency in the ever-evolving landscape of micro- and nano-technology.","technical_analysis":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** (US-9852881) introduces a sophisticated solution to a long-standing metrology challenge in semiconductor manufacturing, specifically the characterization of super high aspect ratio (HAR) structures prevalent in 3D-NAND flash memory. The fundamental problem lies in the inability of conventional scanning electron microscopes (SEMs) to provide accurate, non-destructive measurements and inspection from the bottom of these incredibly deep and narrow holes.\n\n**Technical Architecture and Principle:**\nThe core of this invention revolves around a specialized electron optics and detection system. A primary electron beam (PEB) is generated and accelerated to a high voltage. This high accelerating voltage is crucial as it provides the necessary kinetic energy for the electrons to penetrate deeply into the sample material, reaching the bottom of HAR holes, which can be tens of micrometers deep with widths in the tens of nanometers. The PEB interacts with the sample, generating various signals, including secondary electrons (SEs) and backscattered electrons (BSEs).\n\nThe key innovation lies in the selective detection of specific BSEs. Unlike traditional BSE detectors that might capture a broad range of scattering angles, this system is designed to detect 'low-angle backscattered electrons' – defined as BSEs with a zenith angle of five degrees or more. These particular BSEs are critical because they are generated from the bottom surface of the HAR hole and then travel upwards, *penetrating through the sidewall material* of the hole before exiting the sample surface to be detected. These are termed 'penetrating BSEs.'\n\n**Implementation Details and Algorithm Specifics:**\n1.  **High Voltage Beam Application:** The primary electron beam is directed at the sample with an accelerating voltage typically in the range of several kilovolts to tens of kilovolts, ensuring sufficient interaction volume to reach the bottom of the HAR structure.\n2.  **Low-Angle BSE Detection:** Specialized detectors, potentially annular or segmented, are positioned to preferentially capture BSEs emerging at a low zenith angle. This angular selectivity is paramount to isolate the penetrating BSEs from other types of scattered electrons (e.g., those from the top surface or upper sidewalls).\n3.  **Signal Acquisition and Processing:** The detected low-angle BSE signal is converted into an image. The intensity or brightness of pixels in this image is directly related to the number of detected penetrating BSEs.\n4.  **Calibration Curve Generation:** The core algorithm for quantitative measurement involves establishing a calibration curve. This curve maps the relationship between the actual hole depth and the intensity (brightness) of the detected penetrating BSE signal. The physical principle is that as a hole's depth increases, the path length of the penetrating BSEs through the sidewall material also increases. This longer path leads to greater attenuation (absorption and scattering) of the electrons, resulting in a weaker signal and thus a darker image. Conversely, a shallower hole or a fully opened hole would yield a brighter signal.\n    *   This calibration is typically performed using known reference samples with varying, precisely measured hole depths.\n5.  **Measurement and Inspection:** Once calibrated, the system can apply this curve to unknown samples. By analyzing the brightness of the penetrating BSE image, the system can accurately:\n    *   Determine the depth of a HAR hole.\n    *   Ascertain whether a hole is fully opened (e.g., a sudden increase in brightness indicating breakthrough).\n    *   Inspect and measure the ratio of the top diameter to the bottom diameter, providing insights into etching profiles and taper angles.\n\n**Integration Patterns and Performance Characteristics:**\nThis system would integrate seamlessly into existing SEM platforms with modifications to the detector assembly and image processing unit. The high accelerating voltage ensures compatibility with existing electron column designs. The processing unit would require robust computational capabilities for real-time image acquisition, filtering, calibration curve application, and data output.\n\nPerformance characteristics include high spatial resolution (limited by the electron beam spot size and interaction volume), excellent depth resolution (derived from the sensitivity of the calibration curve), and non-destructive operation. The ability to perform these measurements in-line or near-line drastically improves feedback loops in manufacturing processes, leading to tighter process control and reduced defect rates. This technology offers a significant leap in precision for nanoscale metrology, providing insights previously only achievable through destructive methods.","business_analysis":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** (US-9852881) represents a significant business opportunity within the semiconductor industry, particularly as manufacturing processes become increasingly complex and demanding. The patent addresses a critical unmet need in metrology for 3D-NAND flash memory and other advanced microelectronic devices, positioning itself as a key enabler for next-generation technology.\n\n**Market Opportunity Size:**\nThe global semiconductor metrology and inspection equipment market is substantial, projected to reach tens of billions of dollars. Within this, the segment for advanced electron microscopy and critical dimension (CD) metrology tools for 3D-NAND and logic devices is experiencing rapid growth. As 3D-NAND structures increase in layer count and aspect ratio, the demand for precise, in-line, non-destructive inspection of deep features will only intensify. This patent directly targets this high-growth, high-value segment, offering a solution to a bottleneck that current technologies cannot adequately address. The market for memory chips alone is enormous, and any innovation that improves yield and efficiency within this sector commands significant value.\n\n**Competitive Advantages:**\nThis innovation offers several distinct competitive advantages:\n\n1.  **Unprecedented Depth Measurement:** Unlike traditional SEMs, this system provides reliable, quantitative depth measurement and hole opening verification for super high aspect ratio holes, a capability that is difficult or impossible for competitors using conventional methods. This enables manufacturers to 'see' and measure what was previously a blind spot.\n2.  **Non-Destructive and In-Line Capability:** The ability to perform these critical measurements non-destructively and potentially in-line reduces reliance on time-consuming and costly destructive cross-sectioning. This directly translates to faster process development, higher throughput, and reduced operational expenses.\n3.  **Improved Yield and Quality:** By providing precise feedback on the integrity and dimensions of critical structures, this technology can significantly improve manufacturing yields and overall product quality, leading to substantial cost savings and a stronger competitive position for chipmakers.\n4.  **Proprietary Technology:** The patented method of detecting and utilizing low-angle penetrating BSEs for quantitative measurement creates a strong intellectual property barrier, offering a sustained competitive edge.\n\n**Revenue Potential and Business Models:**\nRevenue potential is high, primarily through the sale of specialized SEM systems incorporating this technology or as an upgrade module for existing high-end SEMs. Licensing opportunities for the patented method to existing metrology equipment manufacturers also present a viable business model. Additionally, providing specialized metrology services using this advanced system could cater to smaller foundries or R&D labs. The high value added by solving critical manufacturing challenges allows for premium pricing.\n\n**Strategic Positioning:**\nThis technology strategically positions a company as a leader in advanced semiconductor metrology, particularly for 3D-NAND and other complex 3D integrated circuits. It enables customers to push the boundaries of device scaling and performance, making it an indispensable tool for cutting-edge fabrication facilities. The innovation aligns perfectly with industry trends towards greater integration, miniaturization, and the need for increasingly precise process control.\n\n**ROI Projections:**\nFor semiconductor manufacturers, the ROI would be substantial, driven by:\n\n*   **Yield Improvement:** Even a small percentage increase in yield for high-volume 3D-NAND production translates to millions of dollars in savings.\n*   **Reduced R&D Cycles:** Faster feedback on process parameters accelerates product development, bringing new generations of chips to market quicker.\n*   **Cost Savings:** Minimizing destructive testing, rework, and scrap significantly lowers operational costs.\n\nInvestors would see strong returns from the adoption of this critical technology across the semiconductor industry, especially given its ability to solve a fundamental problem that continues to grow in importance with each new generation of chips. This patent is not just an incremental improvement; it's a foundational technology that unlocks new levels of precision and efficiency in high-volume, high-value manufacturing.","faqs":[{"answer":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** (US-9852881) is a groundbreaking patent that introduces an innovative approach to inspecting and measuring microscopic structures, particularly 'super high aspect ratio' holes found in advanced semiconductor manufacturing, such as 3D-NAND flash memory.\n\nThis system enhances traditional scanning electron microscopy (SEM) by enabling it to 'see' and quantify features that were previously inaccessible. It allows manufacturers to accurately determine the depth of these incredibly deep and narrow holes, verify if they are fully opened, and measure their critical dimensions like the top-to-bottom diameter ratio. This capability is vital for quality control and process optimization in the production of modern microchips.\n\nThe core innovation lies in its ability to detect and analyze specific electron signals that conventional SEMs overlook, providing unprecedented insights into the integrity of complex nanoscale architectures. This technology directly addresses a critical metrology gap, offering a non-destructive method to gather crucial data that was previously only obtainable through destructive and time-consuming techniques. It represents a significant step forward in precision manufacturing and quality assurance for advanced electronics.\n\nEssentially, this patent describes a sophisticated method to overcome the physical limitations of 'seeing' into extremely confined spaces, transforming how quality and performance are ensured in the semiconductor industry. Its precise measurement capabilities are key to boosting yields and accelerating innovation in the development of next-generation memory devices. Keywords: scanning electron microscope, 3D-NAND, pattern measurement, high aspect ratio, semiconductor inspection, patent US-9852881.","question":"What is Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope?"},{"answer":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** works by employing a specialized method of electron detection and analysis. It begins by applying a primary electron beam, accelerated at a high voltage, to the sample. This high energy allows the electrons to penetrate deeply into the material, reaching the bottom of the super high aspect ratio holes.\n\nThe key innovation then comes into play: instead of focusing on typically detected electrons, this system specifically targets and detects 'low-angle backscattered electrons' (BSEs). These are electrons that are generated from the very bottom of the hole and, instead of exiting directly upwards, travel *through the sidewall material* of the hole before emerging at a shallow angle (a zenith angle of five degrees or more) to be detected. These are referred to as 'penetrating BSEs'.\n\nThe brilliance of this approach is its quantitative capability. The amount of these penetrating BSEs that successfully escape and are detected is directly related to the hole's depth. As a hole becomes deeper, the path length these electrons must traverse through the solid sidewall material increases, leading to greater attenuation and a reduced signal. This reduction in signal manifests as a darker image in the SEM. Conversely, shallower holes or fully opened holes produce a brighter signal.\n\nBy establishing a precise calibration curve that maps this image brightness to actual hole depth, the system can accurately measure the depth of any given hole and verify its opening status non-destructively. This allows for unprecedented precision in characterizing complex microstructures. Keywords: how it works, penetrating BSEs, electron beam, low-angle detection, calibration curve, hole depth measurement, non-destructive, patent US-9852881.","question":"How does Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope work?"},{"answer":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** solves a critical and long-standing problem in advanced semiconductor manufacturing: the inability to accurately and non-destructively inspect and measure 'super high aspect ratio' (HAR) holes. These holes, which are incredibly deep and narrow, are fundamental to the architecture of modern devices like 3D-NAND flash memory.\n\nPrior to this invention, traditional scanning electron microscopes (SEMs) struggled to obtain reliable information from the bottom of these intricate structures. This meant manufacturers often couldn't definitively tell if a hole was fully etched through (i.e., 'opened'), or accurately measure its depth and critical dimensions like the top-to-bottom diameter ratio. This 'blind spot' in metrology created significant challenges.\n\nThe problems caused by this limitation included reduced manufacturing yields due to undetected defects, increased production costs from wasted materials and rework, and slower research and development cycles because engineers lacked precise feedback to optimize their fabrication processes. The only truly reliable methods often involved destructive cross-sectioning, which is time-consuming, expensive, and not suitable for mass production.\n\nThis patent directly addresses these issues by providing a non-destructive, precise, and quantitative method to characterize HAR holes, thereby enabling better quality control, faster process optimization, and ultimately, more efficient and cost-effective production of advanced microchips. Keywords: problem solved, 3D-NAND, high aspect ratio holes, semiconductor metrology, manufacturing challenges, yield improvement, non-destructive inspection, patent US-9852881.","question":"What problem does Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope solve?"},{"answer":"The patent for the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** (US-9852881) lists inventors. While the provided data extract does not include the specific names of the inventors, it is common for such sophisticated technologies to be developed by teams of engineers and scientists working within research and development departments of leading technology companies or academic institutions.\n\nTypically, the assignee (the entity to whom the patent rights are transferred) is a corporation that funds the research and development efforts, providing the resources and infrastructure necessary for such complex inventions. This patent, with its focus on advanced semiconductor metrology, likely originated from a company deeply involved in electron microscopy equipment manufacturing or semiconductor device fabrication.\n\nIdentifying the inventors would require consulting the full patent document, which would detail the individuals credited with the intellectual creation of this innovative system and method. Their expertise would span fields such as electron optics, material science, image processing, and semiconductor manufacturing processes. Keywords: inventors, assignee, patent US-9852881, semiconductor research, electron microscopy development.","question":"Who invented Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope?"},{"answer":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** offers several transformative benefits for the semiconductor industry and beyond:\n\nFirstly, it provides **unprecedented precision in deep-hole metrology**. Unlike conventional methods, this system can accurately measure the depth of super high aspect ratio holes and verify if they are fully opened, a critical capability for 3D-NAND manufacturing. This eliminates significant guesswork and improves the reliability of quality control.\n\nSecondly, it enables **non-destructive inspection**. This is a major advantage as it removes the need for costly and time-consuming destructive testing (like cross-sectioning) that was previously required to obtain such detailed information. This dramatically speeds up manufacturing processes and reduces material waste.\n\nThirdly, it leads to **significant improvements in manufacturing yields and cost reduction**. By providing real-time, accurate feedback on the integrity of critical structures, manufacturers can detect and correct defects earlier, thereby minimizing scrap wafers and rework. This directly translates to substantial savings and increased profitability in high-volume production environments.\n\nFinally, this innovation **accelerates research and development cycles**. Engineers gain precise, immediate feedback on their process adjustments, allowing them to optimize fabrication steps faster and bring new generations of advanced microchips to market more quickly. These benefits collectively position the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** as a cornerstone technology for the future of precision manufacturing. Keywords: key benefits, 3D-NAND yield, non-destructive, cost savings, R&D acceleration, precision metrology, patent US-9852881.","question":"What are the key benefits of Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope?"},{"answer":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** distinguishes itself from prior art by fundamentally changing how information is extracted from deep, high aspect ratio (HAR) structures, which were a significant 'blind spot' for previous technologies.\n\nTraditional scanning electron microscopes (SEMs) typically rely on secondary electrons (SEs) for surface imaging or high-angle backscattered electrons (BSEs) for material contrast. However, SEs are easily trapped or absorbed in deep holes, making it impossible to image the bottom. High-angle BSEs, while more penetrating, often scatter in complex ways within HAR structures, yielding ambiguous information from the deepest regions. Neither could reliably provide quantitative depth measurements or confirm hole opening non-destructively.\n\nThis patent's key differentiation lies in its specific focus on detecting 'low-angle backscattered electrons' (penetrating BSEs) that originate from the *bottom of the hole* and travel *through its sidewall material*. This targeted detection mechanism is unique and provides a direct signal from previously inaccessible areas. Furthermore, the invention leverages the physical principle that the signal intensity of these penetrating BSEs correlates directly with hole depth – a relationship that allows for precise, quantitative measurement via a calibration curve.\n\nUnlike prior art, which often necessitated destructive cross-sectioning for accurate HAR characterization, this system offers a non-destructive, in-line solution. This fundamental shift from qualitative or destructive analysis to quantitative, non-destructive measurement is what sets the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** apart and makes it a transformative innovation in semiconductor metrology. Keywords: prior art comparison, penetrating BSEs, low-angle detection, quantitative measurement, non-destructive, 3D-NAND, SEM limitations, patent US-9852881.","question":"How is Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope different from prior art?"},{"answer":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** is poised to significantly impact several high-tech industries, with its primary and most immediate influence being on the **semiconductor manufacturing industry**.\n\nWithin semiconductors, it will revolutionize the production of **3D-NAND flash memory**, where precise inspection and measurement of super high aspect ratio holes are critical for achieving high yields and performance. This impact will extend to other advanced integrated circuits that utilize complex 3D structures and require intricate nanoscale metrology. Foundries and chip design companies will benefit from enhanced quality control and accelerated development cycles.\n\nBeyond semiconductors, the underlying principles of deep, non-destructive inspection of high aspect ratio features could find applications in **Micro-Electro-Mechanical Systems (MEMS)** manufacturing, which involves creating tiny mechanical devices with complex 3D geometries. Similarly, the **advanced packaging industry**, focused on integrating multiple chips into a single package, often deals with intricate interconnects that would benefit from this precision metrology.\n\nFurthermore, industries involved in **advanced materials science** and **nanotechnology research** could leverage this system for characterizing internal structures, defects, or novel materials with complex pore architectures. Any sector demanding high-precision, non-destructive characterization of deep, narrow features at the nanoscale stands to gain from the capabilities introduced by the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope**. Keywords: impacted industries, 3D-NAND, semiconductor, MEMS, advanced packaging, materials science, nanotechnology, patent US-9852881.","question":"What industries will Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope impact?"},{"answer":"The **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** (US-9852881) has specific dates associated with its intellectual property lifecycle.\n\nThe patent application for this invention was filed on **November 19, 2014**. This date marks when the inventors or their assignees submitted the detailed description, claims, and drawings to the patent office, formally initiating the patent examination process.\n\nFollowing examination, which involves a review of the application against existing prior art and patentability requirements, the patent was subsequently granted and published on **December 26, 2017**. This publication date signifies when the patent officially became public record and the intellectual property rights were formally conferred.\n\nThese dates are crucial for understanding the patent's timeline, its position relative to other technological advancements, and the duration of its legal protection. The period between filing and grant reflects the time taken for the patent office to process and approve the invention, validating its novelty and inventiveness. Keywords: filing date, publication date, patent timeline, US-9852881, patent process.","question":"When was Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope filed/granted?"},{"answer":"The commercial applications of the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** are primarily centered around enhancing quality control and efficiency in high-precision manufacturing, particularly in the semiconductor sector.\n\nIts most significant commercial application is in **3D-NAND flash memory production**. This system directly addresses the critical need for accurate, non-destructive inspection of super high aspect ratio holes, enabling manufacturers to verify hole opening, measure depths, and assess critical dimensions. This leads to higher manufacturing yields, reduced scrap rates, and lower production costs for memory chips found in smartphones, SSDs, and data centers.\n\nBeyond 3D-NAND, other commercial applications include **quality assurance for advanced logic devices** that incorporate complex 3D transistor architectures. Any microchip fabrication process involving deep trenches, vias, or through-silicon vias (TSVs) would benefit from this technology's precise metrology capabilities.\n\nFurthermore, the system could be commercially applied in **metrology equipment manufacturing**. Companies specializing in SEMs or other inspection tools could license or integrate this patented method to offer superior solutions to their customers. It also opens avenues for **specialized inspection services** for R&D labs or smaller foundries that might not invest in the full equipment but require high-precision characterization. The demand for increasingly precise and efficient manufacturing processes ensures a robust commercial market for this innovation. Keywords: commercial applications, 3D-NAND, semiconductor quality control, manufacturing efficiency, metrology equipment, advanced logic, patent US-9852881.","question":"What are the commercial applications of Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope?"},{"answer":"Looking ahead, the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** is poised for several exciting future developments that will further solidify its impact on advanced manufacturing and research.\n\nOne key area of development will be **integration with Artificial Intelligence (AI) and Machine Learning (ML)**. The quantitative data generated by this system (brightness-to-depth correlation) is ideal for training AI models. This could lead to autonomous defect detection, predictive process control, and real-time optimization of fabrication parameters, minimizing human intervention and maximizing efficiency.\n\nAnother expected development is the **extension to even higher aspect ratios and more complex 3D structures**. As semiconductor technology continues to scale, holes will become even deeper and narrower. Future iterations of this technology will likely push the boundaries of electron optics and detector sensitivity to maintain accurate measurements in these extreme geometries.\n\nFurthermore, we can anticipate **broader application across diverse industries**. While currently focused on semiconductors, the underlying principles of 'seeing through' dense materials could be adapted for characterizing internal structures in advanced materials (e.g., porous ceramics, composites), in micro-fluidic devices, or even in certain biological applications at the nanoscale. Research into 3D reconstruction based on these penetrating electron signals could also yield novel imaging modalities.\n\nFinally, there will be continuous improvements in **speed and throughput**. As a critical in-line metrology tool, increasing the speed of measurement without compromising accuracy will be a constant goal, further enhancing its value in high-volume manufacturing environments. These developments will ensure that the **Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope** remains at the forefront of nanoscale inspection technology. Keywords: future developments, AI integration, higher aspect ratios, autonomous metrology, cross-industry applications, enhanced throughput, patent US-9852881.","question":"What are the future developments expected for Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope?"}],"topics":["scanning electron microscope system","pattern measurement method","scanning electron microscope","3D-NAND metrology","high aspect ratio","technical","background","modern"],"tech_cluster":null},"seo":{"title":"SEM System for 3D-NAND - US-9852881 Patent Analysis","description":"Explore the Scanning Electron Microscope System, Pattern Measurement Method Using Same, and Scanning Electron Microscope patent. Revolutionizing 3D-NAND inspection with deep hole measurement.","keywords":["scanning electron microscope system","pattern measurement method","scanning electron microscope","3D-NAND metrology","high aspect ratio","backscattered electrons","hole depth measurement","semiconductor inspection","patent US-9852881","nanoscale measurement","microchip manufacturing"]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9852881","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9852881","citation_suggestion":"Patentable. \"Scanning electron microscope system, pattern measurement method using same, and scanning electron microscope\" (US-9852881). https://patentable.app/patents/US-9852881","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9852881","json":"https://patentable.app/api/llm-context/US-9852881","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:14:03.316Z"}