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Tokyo, Japan

Yasushi Matsubara

This inventor holds 23 USPTO granted patents and 2 published patent applications, primarily in Semiconductor Devices. Top assignees: Elpida Memory, Inc., Nec Corporation, Ps4 Luxco S.a.r.l.. Active years: 1995-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasushi Matsubara. Retrieved from https://idiyas.com/inventor/yasushi-matsubara-919hfkoh

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

Calculating rank
USPTO Granted Patents = 23 

% Patents Active = 60.9

Average Co-Inventor Count = 1.1

ph-index = 6

Forward Citations = 216(Granted Patents)


Company Filing History:

goldMedal13 out of 1,458 
 
Elpida Memory, Inc.
 patents
silverMedal9 out of 36,735 
 
Nec Corporation
 patents
bronzeMedal1 out of 377 
 
Ps4 Luxco S.a.r.l.
 patents

Years Active: 1995-2015

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Areas of Expertise:
Semiconductor Device
Memory Device
Propagation Time
Test Method
Synchronous DRAM
Transfer Switch
Power Consumption
Word Line
Circuit Device
Reference Potential
Data Transfer Rate
Characteristic Management
23 patents (USPTO):Explore Patents
1. 9030245 - Semiconductor device that can adjust propagation time of internal clock signal (2015-05-12),
2. 8441832 - Semiconductor device and test method thereof (2013-05-14),
3. 7859938 - Semiconductor memory device and test method thereof (2010-12-28),
4. 7751998 - Semiconductor device, method for measuring characteristics of element to be measured, and characteristic management system of semiconductor device (2010-07-06),
5. 7701789 - Semiconductor device (2010-04-20),
6. 7692992 - Semiconductor storage device in which inactive word line potential is set (2010-04-06),
7. 7684272 - Semiconductor memory device with transfer switch and method of operating the device (2010-03-23),
8. 7626862 - Semiconductor memory device (2009-12-01),
9. 7567114 - Semiconductor device having two fuses in parallel (2009-07-28),
10. 7558135 - Semiconductor memory device and test method thereof (2009-07-07),
11. 7463529 - Word line driving circuit putting word line into one of high level, low level and high impedance (2008-12-09),
12. 7428177 - Reference potential generating circuit and semiconductor memory device having the same (2008-09-23),
13. 7233535 - Semiconductor memory device (2007-06-19),
14. 6950363 - Semiconductor memory device (2005-09-27),
15. 6240048 - Synchronous type semiconductor memory system with less power consumption (2001-05-29),

Title: Innovations of Yasushi Matsubara: A Pioneer in Semiconductor Devices

Introduction

Yasushi Matsubara is an esteemed inventor and engineer based in Tokyo, Japan, known for his significant contributions to the field of semiconductor technology. With a remarkable portfolio of 23 patents, Matsubara has developed innovative solutions that enhance the functionality and efficiency of semiconductor devices.

Latest Patents

Among Matsubara's latest inventions is a semiconductor device that can adjust the propagation time of an internal clock signal. This invention features a measurement circuit that measures this propagation time, a delay adjustment circuit for calibrating it based on measurement results, and a data output circuit that synchronously outputs data signals. Another notable patent is focused on a semiconductor device and the corresponding test method. This design allows for multiple data input/output terminals and a strobe terminal interconnected via a test probe, enabling the testing of numerous semiconductor devices in parallel using a limited number of determination circuits within a tester.

Career Highlights

Yasushi Matsubara has had a fruitful career with prominent companies in the semiconductor industry. He has worked at Elpida Memory, Inc. and NEC Corporation, where he contributed to various transformative innovations in semiconductor technologies.

Collaborations

Throughout his career, Matsubara has collaborated with notable colleagues such as Tetsuya Narahara and Hiroshi Ishioka. These partnerships have fostered an environment of creativity and innovation, propelling advancements in their field.

Conclusion

Yasushi Matsubara's work exemplifies the spirit of innovation that drives the semiconductor industry forward. His patents not only demonstrate technical expertise but also reflect a commitment to improving the efficiency of semiconductor devices. As technology continues to evolve, Matsubara's contributions will undoubtedly leave a lasting impact.

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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