Company Filing History:
3 out of 52,730 
3 out of 2,916 
Years Active: 1983-1996
Title: Syoichi Washizuka: Innovator in Semiconductor Technology
Introduction
Syoichi Washizuka is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 6 patents. His work focuses on improving the efficiency and manufacturing processes of semiconductor light-emitting elements.
Latest Patents
One of Washizuka's latest patents is an estimation method and apparatus for semiconductor light-emitting elements. This innovative method estimates luminous efficiency by obtaining the lifetime of carriers that control this efficiency. The technique involves using pulsed laser light to excite carriers in a light-emitting layer, allowing for the detection of fluorescent light emitted from a specific position. This method enables the estimation of light-emitting elements at the wafer stage without damaging or contacting the wafer.
Another notable patent involves methods of manufacturing compound semiconductor crystals. This method includes providing a compound semiconductor melt in a crucible with a composition ratio that deviates from stoichiometry. During the pulling step of the crystal from the crucible, a constitutional element is added to maintain the desired composition ratio, ensuring high-quality crystal production.
Career Highlights
Throughout his career, Syoichi Washizuka has worked with several notable companies, including Toshiba Corporation and Tokyo Shibaura Electric Co., Ltd. His experience in these organizations has allowed him to refine his expertise in semiconductor technology and contribute to various innovative projects.
Collaborations
Washizuka has collaborated with esteemed colleagues such as Jisaburo Ushizawa and Yoshihiro Kokubun. These partnerships have fostered a creative environment that has led to advancements in semiconductor research and development.
Conclusion
Syoichi Washizuka's contributions to semiconductor technology have made a lasting impact on the industry. His innovative patents and collaborative efforts continue to influence the field, showcasing his dedication to advancing technology.