Location History:
- Tokyo, JP (1988 - 1993)
- Kanagawa, JP (1997 - 2008)
Company Filing History:
10 out of 58,131 
1 out of 232 
Years Active: 1988-2008
Title: Here’s the Ingenious Work of Ichiro Hase
Introduction
Ichiro Hase, a prominent inventor located in Kanagawa, Japan, has made significant contributions in the realm of semiconductor technology. With 11 patents to his name, Hase has established himself as an influential figure in advancing electronic components and devices. His work continues to impact the fields of engineering and technology, particularly in the development of high-performance semiconductor devices.
Latest Patents
Among Hase's latest innovations is a semiconductor device characterized by its novel structure. This device includes an emitter layer, a base layer, and a collector layer. A noteworthy feature is that the collector and emitter layers incorporate heavily doped thin sublayers, each having a high impurity concentration. This design results in improved performance by ensuring that each heavily doped sublayer has a higher impurity concentration than the adjacent semiconductor layers.
Another significant patent involves a heterojunction bipolar transistor (HBT) that utilizes a base layer containing bismuth. This invention enhances the characteristics of the HBT, utilizing a III–V compound semiconductor with Bi added for a GaAs-based or InP-based HBT. For example, a GaAs-based HBT is created by stacking a subcollector layer of n-GaAs, a collector layer of n-GaAs, a base layer of p-GaAsBi, and an emitter layer of n-InGaP, among other structural elements. This innovative construction exemplifies Hase's expertise in semiconductor materials and design.
Career Highlights
Ichiro Hase has had a distinguished career, marked by his role at Sony Corporation, one of the leading companies in technology and electronics. In addition to his work at Sony, he served as the Director-General of the Agency of Industrial Science and Technology, showcasing his leadership in fostering industrial advancements. His contributions have not only been recognized in Japan but have also had a broader impact on the global technology landscape.
Collaborations
Throughout his career, Hase has collaborated with renowned professionals, including Hiroji Kawai and Kunio Kaneko. These partnerships have bolstered innovation and facilitated advancements in semiconductor technology, leading to the development of various patents that reflect their collective expertise and vision.
Conclusion
Ichiro Hase's work as an inventor illustrates his commitment to innovation in the semiconductor field. His 11 patents serve as a testament to his creativity and technical proficiency. As technology continues to evolve, the contributions of inventors like Hase play a critical role in shaping the future of electronic devices and enhancing their capabilities.