Koichi Sejima

Title: Koichi Sejima: Innovator in Semiconductor Technology

Introduction

Koichi Sejima is a prominent inventor based in Kanagawa, Japan, known for his contributions to semiconductor technology. With a total of three patents to his name, Sejima has made significant advancements in the field, particularly in the development of innovative semiconductor apparatuses.

Latest Patents

Sejima's latest patents include a semiconductor apparatus and a method for manufacturing the same. This invention enables a reduction in the resistance of a conductive path that electrically connects an upper substrate and a lower substrate. The apparatus features a first semiconductor layer with element formation regions that are disposed adjacent to one another, separated by element isolation regions. Each element formation region contains a first active element, along with contact regions on the element isolation region side of the front layer portion. Additionally, conductive pads are connected to the contact regions and extend across the element isolation region. The design also includes a first insulating layer, a second semiconductor layer with a second active element, a second insulating layer covering the second semiconductor layer, and conductive plugs that extend from the second insulating layer to the conductive pad. These conductive plugs are made from a material identical to that of the conductive pad and are formed integrally with it. Another notable patent is an imaging unit that comprises a first semiconductor substrate featuring a photoelectric converter, a heat conductive wiring line in contact with the substrate, and a cooling device that regulates the temperature of the photoelectric converter through the heat conductive wiring line.

Career Highlights

Throughout his career, Koichi Sejima has worked with notable companies, including Sony Semiconductor Solutions Corporation and Sony Corporation. His work in these organizations has allowed him to contribute to cutting-edge technology in the semiconductor industry.

Collaborations

Sejima has collaborated with esteemed colleagues such as Nobutoshi Fujii and Koichiro Saga, further enhancing his innovative work in semiconductor technology.

Conclusion

Koichi Sejima's contributions to semiconductor technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence advancements in semiconductor apparatuses and imaging units.