Company Filing History:
Years Active: 1999-2003
Title: Masayoshi Ashida: Innovator in Semiconductor Laser Technology
Introduction
Masayoshi Ashida is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of semiconductor laser technology, holding a total of 3 patents. His work focuses on the development and manufacturing methods of advanced semiconductor lasers.
Latest Patents
One of his latest patents is titled "Semiconductor laser and method for manufacturing the same." This invention involves a group of semiconductor layers forming a first light-emitting region, which includes an active layer determined by a first wavelength of laser beam. This active layer is sandwiched between two cladding layers, which have a greater band gap than that of the active layer. Another group of semiconductor layers forms a second light-emitting region, also including an active layer determined by a second wavelength of laser beam. These regions are aligned vertically to the semiconductor substrate, allowing for the fabrication of a multi-color semiconductor laser with multiple laser beam sources.
Another notable patent is "Semiconductor laser elements and method of making same." This patent describes a semiconductor laser element created by sequentially forming a lower clad layer, an active layer, and an upper clad layer on a semiconductor substrate. An etching stop layer is formed over the upper clad layer, and a contact layer is added. Portions of the contact layer are then etched to create steps, which provide areas in the active layer where current will not flow. This innovative method enhances the efficiency and functionality of semiconductor lasers.
Career Highlights
Masayoshi Ashida is currently associated with Rohm Co., Ltd., a leading company in the semiconductor industry. His work has significantly advanced the understanding and application of semiconductor lasers, making him a key figure in this technological domain.
Collaborations
He has collaborated with Satoshi Uchida, contributing to the development of innovative semiconductor technologies.
Conclusion
Masayoshi Ashida's contributions to semiconductor laser technology have paved the way for advancements in this field. His patents reflect a commitment to innovation and excellence in engineering.