Company Filing History:
Years Active: 1996-1998
Title: The Innovations of Tsuyoshi Taniwatari
Introduction
Tsuyoshi Taniwatari is a prominent inventor based in Hachioji, Japan. He has made significant contributions to the field of optical communication systems, holding a total of four patents. His work focuses on semiconductor photonic integrated circuits and methods for fabricating semiconductor optical devices.
Latest Patents
One of Taniwatari's latest patents is an optical communication system that involves a semiconductor photonic integrated circuit. This invention utilizes a selective-area growth technique with insulating film patterning masks on a semiconductor substrate. The design allows for variable mask widths and open space widths, which are numerically limited. The process enables the formation of multiple contiguous bulk semiconductor layers or quantum well layers, differing in growth layer thickness or composition. The energy level differences between these layers facilitate the creation of semiconductor photonic integrated devices with various functions.
Another notable patent is a method for fabricating semiconductor optical devices. This method simplifies the process of creating multiple distributed feedback lasers or distributed Bragg reflector lasers on a single substrate. The lasers exhibit uniform static and dynamic properties while having individually different oscillation wavelengths. The fabrication involves forming pairs of stripe-type insulating thin film masks over the semiconductor substrate, allowing for the growth of optical waveguide layers through metal organic vapor epitaxy. The resulting semiconductor optical device comprises multiple lasers with varying film thicknesses and compositions.
Career Highlights
Tsuyoshi Taniwatari is currently employed at Hitachi, Ltd., where he continues to innovate in the field of semiconductor technology. His work has significantly advanced the capabilities of optical communication systems, making them more efficient and versatile.
Collaborations
Taniwatari has collaborated with notable colleagues, including Masahiro Aoki and Makoto Suzuki. Their combined expertise has contributed to the successful development of advanced optical devices.
Conclusion
Tsuyoshi Taniwatari's contributions to semiconductor photonic integrated circuits and optical communication systems highlight his role as a leading inventor in the field. His innovative patents and collaborations continue to shape the future of optical technology.