Location History:
- Annaka, JP (1993)
- Takasaki, JP (1994 - 1998)
- Gunma-ken, JP (1997 - 1999)
Company Filing History:
11 out of 1,099 
2 out of 7 Years Active: 1993-1999
Title: Munehisa Yanagisawa: Innovator in Semiconductor Technology
Introduction
Munehisa Yanagisawa is a prominent inventor based in Takasaki, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of light-emitting diodes. With a total of 13 patents to his name, Yanagisawa's work has had a lasting impact on the industry.
Latest Patents
One of Yanagisawa's latest patents is a method for the growth of a nitrogen-doped gallium phosphide epitaxial layer. This invention addresses the challenge of achieving a high concentration of nitrogen in the epitaxial layer, which is crucial for enhancing light emission efficiency. Contrary to common beliefs, his method demonstrates that increasing the concentration of ammonia as a nitrogen source can lead to a higher nitrogen concentration in the epitaxial layer. Another notable patent is for fabricating a gap type semiconductor substrate of red light. This substrate is designed for GaP type light-emitting devices and includes an n-type single crystal substrate along with n-type and p-type GaP layers. The innovative approach involves using a specific carbon concentration in the n-type GaP single crystal substrate, which is obtained through a unique growth method.
Career Highlights
Throughout his career, Yanagisawa has worked with notable companies such as Shin-Etsu Handotai Co., Ltd. and Shin-Etsu Handotai Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
Yanagisawa has collaborated with esteemed colleagues, including Susumu Higuchi and Yuuki Tamura. These partnerships have further enriched his research and development efforts in the semiconductor field.
Conclusion
Munehisa Yanagisawa's contributions to semiconductor technology, particularly in light-emitting diodes, showcase his innovative spirit and dedication to advancing the field. His patents reflect a deep understanding of the complexities involved in semiconductor fabrication and growth processes.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.