Company Filing History:
Years Active: 1995-1996
Title: Issei Ohta: Innovating Semiconductor Laser Technology
Introduction
Issei Ohta is an accomplished inventor based in Fujiidera, Japan. With a strong focus on semiconductor technology, he has developed innovative solutions that enhance the performance of laser devices. His work has led to the issuance of two patents that significantly contribute to the field of optical disc technology.
Latest Patents
One of Ohta's latest patents involves a fabrication method for a semiconductor laser device. This innovative device operates at low current and produces minimal noise, making it ideal for the 780 nm band light source used in optical discs. The design includes a first light guide layer made of a specific conduction type Ga.sub.1-Y1 Al.sub.Y1 As, and a second light guide layer composed of either Ga.sub.1-Y2 Al.sub.Y2 As, In.sub.0.5 Ga.sub.0.5 P, In.sub.0.5 (GaAl).sub.0.5 P, or InGaAsP. These layers are successively formed on at least one side of the principal plane of the active layer. The device is further enhanced by a current blocking layer made of opposite conduction type Ga.sub.1-Z Al.sub.Z As, characterized by a stripe-like window, along with a cladding layer designed to optimize performance. The specific relationships of Z>Y3>Y2 and Y1>Y2 define the necessary AlAs mole fractions for optimal function.
Career Highlights
Issei Ohta is currently associated with Matsushita Electric Industrial Co., Ltd., where he continues his research and development in semiconductor technologies. His contributions have not only led to the creation of patented technologies but have also influenced advancements in optical media.
Collaborations
Throughout his career, Ohta has worked alongside talented colleagues, including Hiroki Naito and Masahiro Kume. These collaborations have fostered a productive environment where innovative ideas can evolve into commercially viable technologies.
Conclusion
Issei Ohta is a notable figure in the field of semiconductor innovations. His contributions through patents and collaborative efforts have paved the way for advancements in laser technologies critical to optical disc applications. Ohta's work exemplifies the importance of innovation in driving technological progress and enhancing performance in electronic devices.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.