Miyagi, Japan

Masahiko Shimada

This inventor holds 14 USPTO granted patents and 2 published patent applications, primarily in GaN Crystal Growth. Top assignees: Ricoh Company, Ltd., Sumitomo Electric Industries, Limited. Active years: 1989-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiko Shimada. Retrieved from https://idiyas.com/inventor/masahiko-shimada-rhm6af1p

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

Calculating rank
USPTO Granted Patents = 14 

% Patents Active = 50.0

Average Co-Inventor Count = 4.5

ph-index = 6

Forward Citations = 188(Granted Patents)


Company Filing History:


Years Active: 1989-2018

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Areas of Expertise:
GaN Bulk Crystal
Semiconductor Device
Crystal Growth Apparatus
Group-III Nitride
Crystal Growth Method
Young's Modulus
Internal Friction
Device Measurement
14 patents (USPTO):Explore Patents

Title: Masahiko Shimada: Innovator in Semiconductor Technology

Introduction: Masahiko Shimada is a distinguished inventor based in Miyagi, Japan, specializing in semiconductor technology. With a remarkable portfolio of 14 patents, his contributions have significantly advanced the field of crystal growth and semiconductor devices.

Latest Patents: Among his latest innovations are crucial patents focusing on the production of Gallium Nitride (GaN) bulk crystal substrates. One notable patent concerns the creation of a GaN bulk crystal substrate and a semiconductor device formed on it. The crystal produced has a diameter of 1 cm or more and displays a pronounced peak in its cathode luminescent spectrum at a wavelength of 360 nm, aligning with the band edge. Additionally, he has developed a crystal growth apparatus that enhances Group-III nitride crystal growth methodology through a novel mixed molten liquid process involving alkaline materials and Group-III metals.

Career Highlights: Throughout his career, Masahiko Shimada has collaborated with reputable organizations such as Ricoh Company, Ltd. and Sumitomo Electric Industries, Limited. His innovative work in semiconductor technology has made lasting impacts on both industries.

Collaborations: In his pursuits, Masahiko has worked alongside notable colleagues, including Seiji Sarayama and Hisanori Yamane. Their collaborative efforts have further advanced the field and fostered significant intellectual exchanges.

Conclusion: Masahiko Shimada stands out as a key figure in the realm of semiconductor innovation. His extensive patent portfolio reflects his commitment to advancing technology and creating valuable applications in the industry. Through his inventive spirit and collaboration with other experts, he continues to shape the future of semiconductor technology.

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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