Company Filing History:
Years Active: 2003-2008
Title: Toshiaki Kitahara: Innovator in Semiconductor Technology
Introduction
Toshiaki Kitahara is a prominent inventor based in Misato, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 7 patents. His work focuses on improving the properties of bipolar transistors, which are essential components in various electronic devices.
Latest Patents
One of his latest patents is a method for forming patterns on a semiconductor device using a lift-off technique. This innovative technique enhances the properties of bipolar transistors. Specifically, it involves the formation of a collector electrode around a base mesa by the lift-off method. A resist film is created over connection portions between the outer periphery of a region and the region where the base mesa is formed. Following this, gold germanium (AuGe), nickel (Ni), and gold (Au) are successively deposited over the entire surface of the substrate. This process ensures that the stacked film does not become an isolated pattern. Consequently, the stacked film over the base mesa is connected to the stacked film at the outer periphery of the region, facilitating the peeling of the stacked film over the base mesa. Additionally, the method reduces side etching during the formation of a via hole extending from the backside of the substrate to a backside via electrode by using materials like tungsten silicide (WSi), which have minimal reactivity with n-type GaAs or n-type InGaAs layers.
Career Highlights
Throughout his career, Toshiaki Kitahara has worked with notable companies such as Renesas Technology Corporation and Hitachi, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to advancements in semiconductor technology.
Collaborations
He has collaborated with esteemed colleagues, including Atsushi Kurokawa and Hiroshi Inagawa. These partnerships have further enriched his work and innovation in the field.
Conclusion
Toshiaki Kitahara's contributions to semiconductor technology through his patents and collaborations highlight his role as a key innovator in the industry. His work continues to influence the development of advanced electronic devices.