This inventor holds 2 USPTO granted patents. Top assignee: Matsushita Electric Industrial Co., Ltd.. Active years: 1987-1990.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1987-1990
Title: Innovations of Toshiharu Kawabata in Green Light Emitting Diodes
Introduction
Toshiharu Kawabata is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of light-emitting diodes (LEDs), particularly in the development of pure green light emitting diodes. With a total of 2 patents, his work has paved the way for advancements in LED technology.
Latest Patents
Kawabata's latest patents include innovative methods for manufacturing pure green light emitting diodes. One of his notable inventions involves a pure-green light emitting diode that consists of an n-type GaP layer formed on an n-type GaP substrate and a p-type GaP layer created using a liquid phase epitaxial method. This method ensures that the average donor concentration of the p-type GaP layer remains less than or equal to 5.times.10.sup.16 cm.sup.-3. The liquid phase crystal growth of the p-type GaP layer is achieved by maintaining the melt at a constant temperature and reducing the ambient pressure for a specified duration. This process effectively volatilizes donor impurities from the melt, allowing for the production of high-brightness pure-green light emitting diodes that are easily distinguishable from yellow-green variants.
Another patent focuses on the manufacturing process of pure green light emitting diodes. In this method, an n-type GaP epitaxial layer is grown on an n-type GaP substrate, ensuring that the density of dislocation on the surface is minimized. This results in GaP green light emitting diodes that exhibit high intensity of light emission, even when using a GaP substrate with normal dislocation density.
Career Highlights
Kawabata is associated with Matsushita Electric Industrial Co., Ltd., where he has contributed to various projects related to LED technology. His work has been instrumental in enhancing the efficiency and quality of green light emitting diodes.
Collaborations
Throughout his career, Kawabata has collaborated with notable colleagues, including Susumu Koike and Toshio Matsuda. These collaborations have further enriched his research and development efforts in the field of light-emitting diodes.
Conclusion
Toshiharu Kawabata's innovations in the realm of green light emitting diodes have significantly impacted the industry. His patents reflect a commitment to advancing LED technology, making him a key figure
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile