Company Filing History:
4 out of 42,496 
2 out of 149 
1 out of 13 Years Active: 1987-1993
Title: Daisuke Okada: Innovator in Semiconductor Technology
Introduction
Daisuke Okada is a prominent inventor based in Koganei, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 5 patents. His work focuses on innovative methods for manufacturing semiconductor devices, which have implications for various electronic applications.
Latest Patents
One of Okada's latest patents is a method of manufacturing a semiconductor device with a constant width deep groove. This semiconductor device employs a new isolation process, wherein an isolation area is created by burying a material in a deep groove formed in a semiconductor body. The groove is etched using anisotropic dry etching, allowing for the formation of semiconductor elements in selected regions isolated by the isolation area. Additionally, the regions without semiconductor elements are covered with a thick oxide film produced by local oxidation of the semiconductor body. This new isolation process is particularly well-suited for bipolar type semiconductor devices, enhancing their performance and reliability.
Another notable patent involves a semiconductor integrated circuit device that features polycrystalline silicon filling U-grooves etched in a semiconductor substrate. This design forms isolation regions that prevent short-circuiting between the polycrystalline silicon and the electrodes or wiring on the substrate. A silicon dioxide film is formed within the U-grooves, along with a silicon nitride film that provides high hardness, suppressing the development of crystal defects. The oxidation process of the polycrystalline silicon is carefully managed to ensure a thick oxide film is formed, enhancing the device's durability.
Career Highlights
Daisuke Okada has worked with several esteemed companies throughout his career, including Hitachi, Ltd. and Hitachi Microcomputer Engineering, Ltd. His experience in these organizations has allowed him to refine his expertise in semiconductor technology and contribute to groundbreaking innovations in the field.
Collaborations
Okada has collaborated with notable colleagues such as Akihisa Uchida and Toshihiko Takakura. These partnerships have fostered a collaborative environment that has led to advancements in semiconductor manufacturing processes.
Conclusion
Daisuke Okada's contributions to semiconductor technology through his innovative patents and collaborations highlight his role as a key figure in the industry. His work continues to influence the development of advanced electronic devices, showcasing the importance of innovation in technology.