Company Filing History:
2 out of 35 
1 out of 167 Years Active: 2021-2022
Title: The Innovations of Takeshi Yokoyama
Introduction
Takeshi Yokoyama is a prominent inventor based in Toyama, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 3 patents. His work focuses on advanced laser devices and modules that have applications in various industries.
Latest Patents
Yokoyama's latest patents include a semiconductor laser device, a semiconductor laser module, and a welding laser light source system. The semiconductor laser device operates in multiple transverse modes and features a stacked structure comprising a first conductivity-side semiconductor layer, an active layer, and a second conductivity-side semiconductor layer. This innovative design includes a current block layer with an opening that defines a current injection region. The active layer is designed with a second width that exceeds the first width of the opening, ensuring optimal performance. Additionally, the side faces of the first conductivity-side semiconductor layer are inclined to the substrate, enhancing the light distribution within the device.
The semiconductor laser module and welding laser light source system also showcase advanced features. The semiconductor laser device consists of multiple semiconductor layers, including a first and second semiconductor layer on the first conductivity side, an active layer, and additional layers on the second conductivity side. The design ensures that the band gap energy of the layers is optimized for performance, with specific conditions met regarding impurity concentrations.
Career Highlights
Throughout his career, Takeshi Yokoyama has worked with notable companies such as Panasonic Semiconductor Solutions Co., Ltd. and Nuvoton Technology Corporation Japan. His experience in these organizations has allowed him to develop and refine his innovative technologies.
Collaborations
Yokoyama has collaborated with esteemed colleagues, including Norio Ikedo and Tougo Nakatani. These partnerships have contributed to the advancement of his projects and the successful development of his patents.
Conclusion
Takeshi Yokoyama's contributions to semiconductor technology through his innovative patents highlight his expertise and dedication to the field. His work continues to influence advancements in laser technology, making a significant impact on various industries.