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For the Inventor, By the Inventor

Santa Barbara, CA, United States of America

Asako Hirai

This inventor holds 8 USPTO granted patents and 3 published patent applications. Top assignee: University of California. Active years: 2011-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Asako Hirai. Retrieved from https://idiyas.com/inventor/asako-hirai

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

Calculating rank
USPTO Granted Patents = 8 

% Patents Active = 87.5

Average Co-Inventor Count = 6.4

ph-index = 2

Forward Citations = 14(Granted Patents)


Company Filing History:

goldMedal8 out of 16,058 
 
University of California
 patents

Years Active: 2011-2017

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8 patents (USPTO):Explore Patents
1. 9828695 - Planar nonpolar group-III nitride films grown on miscut substrates (2017-11-28),
2. 9340899 - Planar nonpolar group-III nitride films grown on miscut substrates (2016-05-17),
3. 8791000 - Planar nonpolar group-III nitride films grown on miscut substrates (2014-07-29),
4. 8729671 - Method for increasing the area of non-polar and semi-polar nitride substrates (2014-05-20),
5. 8691671 - Planar nonpolar group-III nitride films grown on miscut substrates (2014-04-08),
6. 8278128 - Enhancement of optical polarization of nitride light-emitting diodes by wafer off-axis cut (2012-10-02),
7. 8158497 - Planar nonpolar m-plane group III nitride films grown on miscut substrates (2012-04-17),
8. 8080469 - Method for increasing the area of non-polar and semi-polar nitride substrates (2011-12-20),

Title: Asako Hirai: Innovator in Nonpolar Group-III Nitride Films

Introduction

Asako Hirai is a prominent inventor based in Santa Barbara, California. She has made significant contributions to the field of materials science, particularly in the development of nonpolar group-III nitride films. With a total of eight patents to her name, Hirai's work has advanced the understanding and application of these materials in various technologies.

Latest Patents

One of Hirai's latest patents focuses on planar nonpolar group-III nitride films grown on miscut substrates. This innovation addresses the challenge of surface undulations by providing a nonpolar III-nitride film that is grown on a substrate with a specific miscut angle. The patent details how the surface morphology of the film can be improved with a miscut angle towards the a-axis direction, specifically comprising a miscut angle of 0.15° or greater, but less than 30° towards the a-axis direction. This advancement is crucial for enhancing the performance of devices utilizing these materials.

Career Highlights

Hirai is affiliated with the University of California, where she continues her research and development in the field of nitride materials. Her work has not only contributed to academic knowledge but has also paved the way for practical applications in electronics and optoelectronics.

Collaborations

Throughout her career, Asako Hirai has collaborated with notable figures in the field, including Steven P. DenBaars and Shuji Nakamura. These collaborations have further enriched her research and have led to significant advancements in the technology surrounding group-III nitrides.

Conclusion

Asako Hirai's innovative work in nonpolar group-III nitride films exemplifies her dedication to advancing materials science. Her contributions through patents and collaborations highlight her role as a leading inventor in this specialized field.

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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