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For the Inventor, By the Inventor

Akishima, Japan

Hiraku Chakihara

This inventor holds 67 USPTO granted patents and 15 published patent applications, primarily in Semiconductor Devices (CPC class H01L). Top assignees: Renesas Electronics Corporation, Renesas Technology Corp., Hitachi Ulsi Systems Co., Ltd.. Active years: 2003-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiraku Chakihara. Retrieved from https://idiyas.com/inventor/hiraku-chakihara

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

USPTO Granted Patents = 67 

% Patents Active = 61.2

Average Co-Inventor Count = 3.3

ph-index = 8

Forward Citations = 266(Granted Patents)

Forward Citations (Not Self Cited) = 246(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Hitachinaka, JP (2006 - 2011)
  • Akishima, JP (2003 - 2016)
  • Kanagawa, JP (2012 - 2016)
  • Tokyo, JP (2013 - 2021)

Company Filing History:

goldMedal48 out of 7,654 
 
Renesas Electronics Corporation
 patents
silverMedal18 out of 3,781 
 
Renesas Technology Corp.
 patents
bronzeMedal7 out of 336 
 
Hitachi Ulsi Systems Co., Ltd.
 patents
4. 1 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 2003-2021

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Areas of Expertise:
Semiconductor Device
Manufacturing Method
Integrated Circuit
Non-Volatile Memory
Vertical MISFET
Capacitive Element
Semiconductor Memory
Process
Fabrication
Device Design
Memory Technology
67 patents (USPTO):Explore Patents
1. 11081491 - Semiconductor device and method of manufacturing the same (2021-08-03),
2. 10056402 - Semiconductor device (2018-08-21),
3. 10002768 - Semiconductor device and manufacturing method thereof (2018-06-19),
4. 9831093 - Semiconductor device and manufacturing method thereof (2017-11-28),
5. 9583502 - Method of manufacturing a semiconductor device (2017-02-28),
6. 9570610 - Method of manufacturing semiconductor device (2017-02-14),
7. 9543315 - Semiconductor device (2017-01-10),
8. 9520504 - Semiconductor device and method of manufacturing the same (2016-12-13),
9. 9443991 - Semiconductor device and method of manufacturing the same (2016-09-13),
10. 9412878 - Semiconductor device and manufacturing method thereof (2016-08-09),
11. 9379127 - Semiconductor device and manufacturing method of semiconductor device (2016-06-28),
12. 9373630 - Method of manufacturing semiconductor device (2016-06-21),
13. 9324883 - Semiconductor device and method of manufacturing the same (2016-04-26),
14. 9324726 - Method for manufacturing a semiconductor device (2016-04-26),
15. 9324725 - Semiconductor device and a manufacturing method thereof (2016-04-26),

Title: The Innovative Journey of Hiraku Chakihara: Pioneering Semiconductor Technology

Introduction:

Hiraku Chakihara, a distinguished inventor hailing from Akishima, Japan, has made significant strides in the field of semiconductor technology. With a total of 67 patents to his name, Chakihara has been instrumental in revolutionizing the semiconductor industry with his groundbreaking innovations.

Latest Patents:

Chakihara's latest patents showcase his prowess in semiconductor device manufacturing and nonvolatile memory enhancement. His work on optimizing capacitance between gate patterns and preventing short circuits in memory gate electrodes highlights his commitment to pushing the boundaries of technological advancement.

Career Highlights:

Throughout his career, Chakihara has made notable contributions to renowned companies such as Renesas Electronics Corporation and Renesas Technology Corp. His expertise and dedication have played a vital role in shaping the development of cutting-edge semiconductor solutions in the industry.

Collaborations:

In his journey of innovation, Chakihara has collaborated with esteemed colleagues such as Akio Nishida and Yasushi Ishii. Together, they have worked tirelessly to refine semiconductor technologies and address complex challenges in the field.

Conclusion:

Hiraku Chakihara's impact on the semiconductor industry is truly remarkable, with his inventive spirit and technical acumen driving advancements that have transformed the landscape of semiconductor manufacturing. His relentless pursuit of excellence continues to inspire future generations of inventors and engineers in the pursuit of technological innovation and progress.

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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