Location History:
- Tokyo, JP (1987 - 2004)
- Kanagawa, JP (2005 - 2007)
- Kawasaki, JP (2008)
Company Filing History:
8 out of 35,734 
7 out of 2,467 
1 out of 1,038 
Years Active: 1987-2008
Title: The Innovations of Susumu Kurosawa
Introduction
Susumu Kurosawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of electronics, particularly in the development of piezoelectric oscillators and voltage-controlled capacitive elements. With a total of 16 patents to his name, Kurosawa's work has had a lasting impact on the industry.
Latest Patents
Kurosawa's latest patents include advancements in piezoelectric oscillators. His work addresses the deterioration in frequency stability over time in conventional piezoelectric oscillators that utilize an accumulation type MOS capacitance element. By employing either a P-channel or N-channel transistor type as a MOS capacitance element in a variable capacitance circuit, he has improved stability. A bias voltage is applied between the extraction electrodes formed in the source and drain regions and the extraction electrode provided in the N-well or P-well region. This innovation effectively eliminates instability in the MOS capacitance element over time.
Another notable patent involves a voltage-controlled capacitive element and semiconductor integrated circuit. In this design, an N well is placed on the upper surface of a P-type substrate, with a gate insulating film and gate electrode positioned above it. The gate electrode connects to a gate terminal, while two P-diffusion regions are situated on either side of the gate electrode, connected to ground potential wiring. An N-diffusion region is also included, connected to a well terminal. This configuration generates capacitance between the gate electrode and the N well of a varactor element, enhancing the functionality of the device.
Career Highlights
Throughout his career, Susumu Kurosawa has worked with notable companies such as NEC Corporation and NEC Electronics Corporation. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies in the electronics sector.
Collaborations
Kurosawa has collaborated with esteemed colleagues, including Yoshinori Muramatsu and Yasutaka Nakashiba. Their combined expertise has fostered innovation and advancement in their respective fields.
Conclusion
Susumu Kurosawa's contributions to the field of electronics through his patents and collaborations highlight his role as a leading inventor. His work continues to influence the development of advanced technologies in the industry.