Tsutomu Ishikawa

Title: Tsutomu Ishikawa: Innovator in Light Emitting Devices

Introduction

Tsutomu Ishikawa is a notable inventor based in San Jose, CA, recognized for his contributions to the field of light emitting devices. He holds 2 patents that focus on advanced methods for growing these devices under ultra-violet illumination. His innovative approaches have the potential to enhance the efficiency and performance of light emitting technologies.

Latest Patents

Ishikawa's latest patents detail methods for growing light emitting devices under ultra-violet (UV) illumination. One method involves growing a III-nitride n-type layer over a III-nitride p-type layer while utilizing UV illumination. Another method describes the growth of a light emitting device structure on a substrate, along with a tunnel junction on the device structure, where specific layers are also grown under UV illumination. Additionally, he has developed a method for forming a III-nitride tunnel junction n-type layer over the III-nitride p-type layer to create a tunnel junction light emitting diode. The initial surface formation of the III-nitride tunnel junction n-type layer occurs under illumination, while the remainder is completed without illumination. The UV light used has photon energy that exceeds the band gap energy of the III-nitride p-type layer, which inhibits the formation of Mg–H complexes within the layer due to hydrogen present in the deposition chamber.

Career Highlights

Throughout his career, Tsutomu Ishikawa has worked with Lumileds LLC, where he has contributed significantly to the development of light emitting technologies. His expertise in the field has positioned him as a key player in advancing the capabilities of light emitting devices.

Collaborations

Ishikawa has collaborated with notable professionals in the industry, including Isaac Wildeson and Erik Charles Nelson. These collaborations have further enriched his work and contributed to the success of his innovative projects.

Conclusion

Tsutomu Ishikawa's work in the field of light emitting devices showcases his innovative spirit and dedication to advancing technology. His patents reflect a deep understanding of the complexities involved in device growth and highlight his significant contributions to the industry.