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For the Inventor, By the Inventor

Kanagawa, Japan

Kenji Kasahara

This inventor holds 76 USPTO granted patents and 3 EPO patents, primarily in Semiconductor Manufacturing (CPC class H01L). Top assignees: Semiconductor Energy Laboratory Co., Ltd., Sumitomo Chemical Company, Limited, Sony Corporation. Active years: 1994-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kenji Kasahara. Retrieved from https://idiyas.com/inventor/kenji-kasahara

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 76

% Patents Active = 51.3


Average Co-Inventor Count = 3.2

ph-index = 24

Forward Citations = 2,039(Granted Patents)

Forward Citations (Not Self Cited) = 1,912(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kanagawa-ken, JP (2004)
  • Ibaragi, JP (2007)
  • Atsugi, JP (2004 - 2009)
  • Kanagawa, JP (1994 - 2013)
  • Niihama, JP (2011 - 2014)
  • Tsukuba, JP (2004 - 2019)
  • Ibaraki, JP (2004 - 2020)

Company Filing History:

goldMedal61 out of 16,652 
 
Semiconductor Energy Laboratory Co., Ltd.
 patents
silverMedal10 out of 6,960 
 
Sumitomo Chemical Company, Limited
 patents
bronzeMedal3 out of 58,145 
 
Sony Corporation
 patents
4. 2 out of 834,453 
Other
 patents

Years Active: 1994-2020

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Areas of Expertise:
Semiconductor Device
Thin Film Transistor
Light Emitting Device
Manufacturing Method
Inspection Method
Laser Annealing
Organic Thin Film
Measurement Apparatus
Group III Nitride
Electronic Device
Substrate Processing
Active Element
76 patents (USPTO):Explore Patents
1. 10763332 - Semiconductor wafer and method of inspecting semiconductor wafer (2020-09-01),
2. 10222321 - Laminate substrate measurement method, laminate substrate and measurement apparatus (2019-03-05),
3. 8748756 - Electric device and production method therefor (2014-06-10),
4. 8541844 - Semiconductor device and manufacturing method thereof (2013-09-24),
5. 8344390 - Thin film active element group, thin film active element array, organic light emitting device, display apparatus, and thin film active element manufacturing method (2013-01-01),
6. 8324627 - Organic thin film transistor substrate, its manufacturing method, image display panel, and its manufacturing method (2012-12-04),
7. 8298839 - Manufacturing method of a thin film active element (2012-10-30),
8. 8097891 - Group III nitride semiconductor light emitting device and method for producing the same (2012-01-17),
9. 8030125 - Organic thin-film transistor substrate, its manufacturing method, image display panel, and its manufacturing method (2011-10-04),
10. 7998845 - Semiconductor device and method of manufacturing the same (2011-08-16),
11. 7977750 - Semiconductor device and manufacturing method thereof (2011-07-12),
12. 7811839 - Semiconductor light emitting device and method for manufacturing the same (2010-10-12),
13. 7736917 - Laser beam irradiation method and method of manufacturing a thin firm transistor (2010-06-15),
14. 7679131 - Semiconductor device, manufacturing method thereof, and electronic device (2010-03-16),
15. 7670935 - Manufacturing method of semiconductor device (2010-03-02),

Title: Kenji Kasahara: Innovator in Semiconductor Technology

Introduction

Kenji Kasahara, an accomplished inventor based in Kanagawa, Japan, has made significant contributions to the field of semiconductor technology with a remarkable portfolio of 76 patents. His work primarily focuses on improving semiconductor wafers and related measurement methods, highlighting his impact on modern electronic manufacturing.

Latest Patents

Among Kenji's latest innovations is a patent concerning a semiconductor wafer and a method for inspecting the semiconductor wafer. This innovation includes a nitride crystal layer positioned on a silicon wafer, which features a reaction suppressing layer designed to inhibit reactions between silicon atoms and Group-III atoms. The design incorporates a stress generating layer to produce compressive stress and an active layer for electronic element formation. This innovative arrangement of layers not only enhances the performance of semiconductor wafers but also sets a new standard in the semiconductor industry.

Additionally, he has patented a measurement method for laminate substrates. This method features a three-layer construction, including a base substrate, an absorption layer, and a measurement-target layer. By employing incident light with wavelengths shorter than a threshold wavelength, this technique allows for the precise measurement of monolayers, an advancement that could revolutionize quality assurance in the manufacturing process.

Career Highlights

Kenji Kasahara's career has been marked by his tenure at prestigious companies such as Semiconductor Energy Laboratory Co., Ltd. and Sumitomo Chemical Company, Limited. His experience in these organizations has provided him with a robust platform to explore and innovate within the semiconductor sector, contributing greatly to advancements in the field.

Collaborations

Throughout his career, Kenji has collaborated with prominent figures in the industry, including Shunpei Yamazaki and Ritsuko Kawasaki. These collaborations have enabled him to leverage diverse expertise and insights, fostering innovation and pushing the boundaries of semiconductor technology further.

Conclusion

Kenji Kasahara stands out as a leading inventor in the semiconductor industry, with a substantial portfolio of patents that reflect his dedication to innovation and excellence. His latest advancements in semiconductor wafer technology and measurement methods underscore his impactful contributions, setting the stage for future progress in electronic manufacturing.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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