Company Filing History:
2 out of 2,916 
2 out of 52,730 
1 out of 681 
Years Active: 1978-1993
Title: The Innovations of Takao Ohta
Introduction
Takao Ohta is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of five patents. His work focuses on improving the measurement and evaluation of semiconductor wafers, which are crucial components in electronic devices.
Latest Patents
One of his latest patents is an apparatus for measuring the electrical characteristics of a semiconductor wafer. This innovative device features a conductivity detector and a carrier mobility detector that are independently arranged to optimize detection conditions. A wafer carrying unit is designed to transport the semiconductor wafer between the two detectors, while a controller manages the operation of these components. The apparatus calculates carrier concentration based on the conductivity and carrier mobility detected by both detectors. Additionally, a partition wall is included to minimize electromagnetic wave interference between the detectors.
Another notable patent is a defect-recognition processing apparatus. This device utilizes a television camera to convert crystal defects on the surface of an object under inspection into a defect image pattern. An image processing device then processes the image signal corresponding to this pattern, measuring rectangular images in terms of their length and the ratio between L.sub.Y and L.sub.X. This technology is essential for detecting defects on the surface of semiconductor wafers.
Career Highlights
Throughout his career, Takao Ohta has worked with notable companies such as Tokyo Shibaura Denki and Toshiba Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in semiconductor technology.
Collaborations
Takao Ohta has collaborated with esteemed colleagues, including Junichi Ohno and Toshiro Usami. Their combined expertise has contributed to advancements in the field of semiconductor evaluation and defect recognition.
Conclusion
Takao Ohta's contributions to semiconductor technology through his patents and collaborations highlight his role as a significant inventor in this field. His innovative approaches continue to influence the industry and improve the evaluation processes of semiconductor wafers.