Tenri, Japan

Eiji Yamada

This inventor holds 26 USPTO granted patents and 1 EPO patent, primarily in Nitride Semiconductor Technology. Top assignee: Sharp Kabushiki Kaisha Corporation. Active years: 1995-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Eiji Yamada. Retrieved from https://idiyas.com/inventor/eiji-yamada-vnjfq2ir

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

Calculating rank

% Patents Active = 73.1


Average Co-Inventor Count = 1.8

ph-index = 8

Forward Citations = 328(Granted Patents)


Location History:

  • Nara, JP (2004)
  • Tenri, JP (1995 - 2011)
  • Mihara, JP (2007 - 2013)
  • Osaka, JP (2014 - 2016)

Company Filing History:


Years Active: 1995-2016

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Areas of Expertise:
Nitride Semiconductor
Light-Emitting Device
Optical Recording
Imaging Apparatus
Fabrication Method
Spherical Aberration
Multi-Layer Recording
Decoding Method
Electrical Correction
Spatial Filter
Digital Data Detector
Galois Field
26 patents (USPTO):Explore Patents

Title: Eiji Yamada - Innovator in Nitride Semiconductor Technology

Introduction

Eiji Yamada is an accomplished inventor based in Tenri, Japan, recognized for his significant contributions to semiconductor technology. With a remarkable portfolio that includes 26 patents, his work has had a profound impact on the development of light-emitting elements and other innovative solutions in the field.

Latest Patents

Yamada's latest patent focuses on a nitride semiconductor light-emitting element and the method for producing it. This invention involves a meticulous design comprising three p-type nitride semiconductor layers arranged sequentially above a nitride semiconductor active layer. Notably, the first two layers contain aluminum (Al) with equivalent compositions, while the third layer is designed with a smaller band gap than the second. Furthermore, it details that the p-type impurity concentrations of the second and third layers are lower than that of the first layer, enhancing the element's functionality and efficiency.

Career Highlights

Eiji Yamada is currently employed by Sharp Kabushiki Kaisha Corporation, a renowned company known for its innovative electronic products and technologies. His tenure at the corporation has been marked by substantial achievements related to semiconductor innovations that contribute significantly to the company’s leadership in the tech industry.

Collaborations

In his career, Yamada has collaborated with esteemed colleagues, including Tetsuo Iwaki and Takeshi Kamikawa. Their combined expertise underscores the collective efforts toward advancing semiconductor technologies and creating innovative solutions that push the boundaries of what is possible in the field.

Conclusion

Eiji Yamada stands out as a visionary inventor whose contributions to the field of nitride semiconductors continue to shape the future of light-emitting technology. His patents represent not only personal achievement but also a significant leap forward for the industry, paving the way for new applications and advancements in electronics.

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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