Masao Kiyohara

Title: Masao Kiyohara: Innovator in Semiconductor Technology

Introduction

Masao Kiyohara is a notable inventor based in Takarazuka, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 2 patents. His work focuses on enhancing memory devices, which are crucial for modern electronic applications.

Latest Patents

Kiyohara's latest patents include a semiconductor memory device and a memory cell array of planar cell structure. The semiconductor memory device features a substrate with a longitudinal source diffusion layer and a longitudinal drain diffusion layer, both formed in parallel. A word line crosses over these diffusion layers, with an electrically insulating film interposed between them. This insulating film is designed to be thicker than the gate oxide film formed between the diffusion layers.

The memory cell array patent describes a continuous diffusion region for source and drain regions of multiple memory transistors. These regions are formed in parallel within a substrate, with word lines that are electrically insulated and arranged to cross the diffusion regions. The word lines consist of polycrystal silicon films in alternating layers, ensuring effective insulation. Additionally, the region for ion implantation in the memory transistors is wider than the channel region, enhancing the device's performance.

Career Highlights

Masao Kiyohara is currently employed at Ricoh Company, Ltd., where he continues to innovate in semiconductor technology. His work has been instrumental in advancing memory device designs, which are essential for various electronic applications.

Collaborations

Kiyohara has collaborated with notable coworkers, including Yuichi Ando and Koichi Sogawa. Their combined expertise has contributed to the development of advanced semiconductor technologies.

Conclusion

Masao Kiyohara's contributions to semiconductor technology through his patents reflect his innovative spirit and dedication to advancing electronic devices. His work continues to influence the field, making significant strides in memory device design.