Hiroshi Mitsuhashi

Title: Innovations by Hiroshi Mitsuhashi in Laser Annealing Technology

Introduction

Hiroshi Mitsuhashi, based in Tokyo, Japan, is an influential inventor in the field of semiconductor technology and has made significant contributions with a remarkable portfolio of 19 patents. His expertise lies primarily in laser annealing processes, which are crucial in enhancing the performance of thin film transistors used in liquid crystal displays.

Latest Patents

Mitsuhashi's recent inventions include innovative methods related to laser annealing. One of his latest patents is the "Laser annealing method and apparatus for determining laser annealing conditions." This method involves preparing multiple polycrystalline silicon film samples with varying grain sizes and determining optimal energy density conditions through precise laser irradiation. The outcome is a controlled laser annealing process that improves the properties of amorphous silicon thin films.

Another notable patent is the "Method of producing polycrystalline silicon." This involves using a polycrystalline silicon layer in thin film transistors adapted for each pixel switch in liquid crystal displays. The unique aspect of this invention lies in the design of the laser intensity distribution curve, which enhances the laser annealing process by ensuring that the higher-intensity portion of the laser beam interacts with the amorphous silicon first. This innovative approach expands the fluence margin, resulting in improved field-effect mobility and higher yields in production.

Career Highlights

Hiroshi Mitsuhashi has had a notable career, working with leading companies such as Tsumura & Co. and Toshiba Corporation. His work in these renowned organizations has allowed him to develop and refine his innovative approaches to laser technology, significantly impacting the semiconductor industry.

Collaborations

Throughout his career, Mitsuhashi has collaborated with notable coworkers, including Kunio Hosaka and Shigefumi Takeda. These partnerships have further enhanced his inventive capabilities, contributing to advancements in laser annealing techniques and their applications.

Conclusion

Hiroshi Mitsuhashi is a prominent figure in the realm of semiconductor innovations, with his extensive experience and groundbreaking patents paving the way for advancements in laser annealing technology. His work continues to influence the production and performance of critical components in modern electronic displays.