Hidemi Arakawa

Title: Innovations of Hidemi Arakawa in Semiconductor Technology

Introduction

Hidemi Arakawa is a notable inventor based in Tateyama, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of memory devices. With a total of two patents to his name, Arakawa's work focuses on enhancing the reliability and efficiency of semiconductor memory devices.

Latest Patents

Arakawa's latest patents include a semiconductor memory device and a manufacturing method thereof. This method discusses a way to create a semiconductor memory device that features a long refresh time and high reliability by minimizing junction leakage current. This innovation results in increased charge retention time. The optimization of the diffusion layer junction depth, which is formed in a deeper region of the semiconductor substrate, is crucial for achieving this reliability. Typically, the junction depth exceeds 0.1 micrometers.

Two methods are provided for achieving this structure. The first method involves using an implantation voltage exceeding 80 KeV to implant P ions, forming a high carrier concentration profile at a junction depth greater than 0.1 micrometers. The second method consists of a two-step implantation process that forces previously implanted ions deeper into the storage node electrode. A subsequent heat treatment further distributes the dopant ions into the substrate, dispersing crystal defects. The resulting structure is essentially free of crystal defects that typically cause current leakage in conventional memory cell structures.

Career Highlights

Hidemi Arakawa is associated with Nippon Steel Semiconductor Corporation, where he continues to innovate in semiconductor technology. His work has been instrumental in advancing the capabilities of memory devices, making them more efficient and reliable.

Collaborations

Arakawa has collaborated with notable coworkers, including Ichiro Murai and Shinobu Shigeta, who contribute to the innovative environment at Nippon Steel Semiconductor Corporation.

Conclusion

Hidemi Arakawa's contributions to semiconductor technology, particularly in memory devices, highlight his role as a significant inventor in the field. His patents reflect a commitment to enhancing the performance and reliability of semiconductor devices.