Company Filing History:
Years Active: 2008
Title: Tsuyoshi Ujihara: Innovator in Compound Semiconductor Technology
Introduction
Tsuyoshi Ujihara is a prominent inventor based in Fuji, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of compound semiconductor multilayer structures. His innovative work has led to advancements in the performance and stability of Hall devices.
Latest Patents
Ujihara holds a patent for a compound semiconductor multilayer structure, Hall device, and Hall device manufacturing method. This patent enables the stable provision of a quantum well compound semiconductor stacked structure. The invention features first and second compound semiconductor layers composed of antimony (Sb) and at least two of the five elements: aluminum (Al), gallium (Ga), indium (In), arsenic (As), and phosphorus (P). The active layer is composed of InGaAsSb, with specific compositions designed to optimize performance. Compared to the active layer, the first and second compound semiconductor layers each have a wider band gap and a resistance value five times or more greater. The lattice constant differences between the active layer and the first and second compound semiconductor layers are designed within a range of 0.0-1.2%, while the thickness of the active layer is set between 30-100 nm.
Career Highlights
Ujihara is currently employed at Asahi Kasei Electronics Co., Ltd., where he continues to push the boundaries of semiconductor technology. His work has been instrumental in enhancing the capabilities of Hall devices, which are critical in various electronic applications.
Collaborations
Throughout his career, Ujihara has collaborated with notable colleagues, including Takayuki Watanabe and Yoshihiko Shibata. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.
Conclusion
Tsuyoshi Ujihara's contributions to the field of compound semiconductors and Hall devices highlight his role as a leading inventor in this technology. His innovative patent and ongoing work at Asahi Kasei Electronics Co., Ltd. continue to influence the industry positively.