Company Filing History:
18 out of 8,782 
1 out of 306 
1 out of 3,595 
Years Active: 2002-2013
Title: **Shigeaki Okawa: A Pioneer in Semiconductor Innovation**
Introduction
Shigeaki Okawa, based in Tochigi, Japan, is an influential inventor with a remarkable portfolio that includes 19 patents primarily focused on advancements in semiconductor devices. His contributions have significantly impacted the field, particularly in addressing critical challenges faced by semiconductor technology.
Latest Patents
Among his latest inventions, two notable patents stand out. The first addresses the issue of excessive reverse off-leak current in Schottky barrier diodes. This innovative semiconductor device features P-type first and second anode diffusion layers created within an N-type epitaxial layer, alongside N-type cathode diffusion layers. A unique P-type third anode diffusion layer surrounds the first and second layers and extends towards the cathode diffusion layers. Additionally, a Schottky barrier metal layer is formed on the anode diffusion layers to enhance performance.
The second patent also pertains to semiconductor devices and tackles the deterioration of withstand voltage when a wiring layer traverses the surface of an isolation region. This invention includes an epitaxial layer deposited on a substrate, where an LDMOSFET is formed in a region separated by the isolation area. To improve the withstand voltage, the design incorporates a conductive plate at ground potential and another conductive plate in a floating state under the wiring layer, effectively reducing the electric field in the vicinity of the isolation region.
Career Highlights
Shigeaki Okawa has had a distinguished career, contributing to significant advancements while working with notable companies such as Sanyo Electric Co., Ltd. and Sanyo Semiconductor Co., Ltd. His roles in these organizations have allowed him to leverage his innovative ideas and research findings in practical applications.
Collaborations
Throughout his career, Okawa has collaborated with respected colleagues, including Toshiyuki Ohkoda and Yoshiaki Ohbayashi. These partnerships have fostered an environment of shared knowledge and innovation, leading to the development of cutting-edge semiconductor technologies.
Conclusion
Shigeaki Okawa's contributions to the semiconductor industry exemplify the drive for innovation and technological advancement. With a growing number of patents and collaborative efforts, he continues to pave the way for future developments in semiconductor devices, addressing critical challenges and enhancing overall performance in the field.