Company Filing History:
3 out of 21,351 
2 out of 15,906 
Years Active: 2002-2023
Title: Keisuke Furuta: Innovator in Semiconductor and Wavelength Conversion Technologies
Introduction
Keisuke Furuta is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of semiconductor technology and wavelength conversion. With a total of 5 patents to his name, Furuta's work has advanced the capabilities of laser technology.
Latest Patents
One of Furuta's latest patents is a semiconductor laser machine. This innovative machine includes a semiconductor laser element with a first end face that emits a laser beam and a second end face opposite the first. It features a heat sink and a sub-mount that secures the semiconductor laser element to the heat sink. The sub-mount comprises a substrate that acts as a thermal stress reliever, a solder layer joined to the semiconductor laser element, and a junction layer formed between the substrate and the solder layer. Notably, the substrate extends rearward from the first end face toward the second end face, while a portion of the solder layer is removed behind the second end face.
Another significant patent is for a wavelength conversion crystal and wavelength conversion laser device. This device includes a single nonlinear optical crystal that meets both a first and a second phase-matching condition. The first condition is necessary for converting a fundamental wave with a wavelength of 1064 nm into a second harmonic with a wavelength of 532 nm. The second condition is required for converting light with a wavelength of 532 nm into a fourth harmonic with a wavelength of 266 nm. The device is designed to efficiently generate a third or higher-order harmonic with a reliable and simple configuration.
Career Highlights
Furuta has worked with notable companies such as Mitsubishi Denki Kabushiki Kaisha and Mitsubishi Electric Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in semiconductor and laser technologies.
Collaborations
Some of Furuta's coworkers include Shuichi Fujikawa and Tatsuki Okamoto. Their collaboration has likely contributed to the advancements in the projects they have worked on together.
Conclusion
Keisuke Furuta is a distinguished inventor whose work in semiconductor and wavelength conversion technologies has made a lasting impact. His innovative patents and collaborations with industry leaders highlight his significant contributions to the field.