Location History:
- Kawasaki, JP (2010 - 2015)
- Kanagawa, JP (2005 - 2016)
- Tokyo, JP (2007 - 2019)
- Ibaraki, JP (2017 - 2020)
Company Filing History:
11 out of 7,525 
7 out of 2,467 
Years Active: 2005-2020
Title: Hiroyuki Kunishima: Innovator in Optical Semiconductor Technology
Introduction
Hiroyuki Kunishima is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of optical semiconductor technology, holding a total of 18 patents. His innovative work has paved the way for advancements in semiconductor devices and optical coupling methods.
Latest Patents
Among his latest patents is a semiconductor device that features a low reflectance film. This film has a second reflectance of 50% or lower, which is strategically placed between an optical directional coupler and first-layer wiring. This design minimizes the impact of light reflected by the first-layer wiring on the optical signals traveling through the optical waveguides. Another notable patent is for an optical semiconductor device that enhances light shift precision while minimizing light transmission loss. This device improves light coupling between optical waveguides by adjusting the line edge roughness of various surfaces within the optical coupling region.
Career Highlights
Hiroyuki Kunishima has worked with leading companies in the electronics sector, including Renesas Electronics Corporation and NEC Electronics Corporation. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
Throughout his career, Kunishima has collaborated with notable colleagues such as Toshiyuki Takewaki and Yasutaka Nakashiba. These partnerships have fostered a collaborative environment that has led to significant advancements in their respective fields.
Conclusion
Hiroyuki Kunishima's contributions to optical semiconductor technology are noteworthy and impactful. His innovative patents and collaborations reflect his dedication to advancing the field. His work continues to influence the development of new technologies in the semiconductor industry.