Takao Kakiuchi

Title: Takao Kakiuchi: Innovator in Non-Volatile Semiconductor Memory Devices

Introduction

Takao Kakiuchi is a prominent inventor based in Takarazuka, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of non-volatile memory devices. With a total of 6 patents to his name, Kakiuchi's work has had a lasting impact on the industry.

Latest Patents

One of Kakiuchi's latest patents involves a non-volatile semiconductor memory device and a method for fabricating it. This innovative device is designed to be long-life, electrically writable, and erasable. The fabrication process includes several steps, starting with the formation of a first gate insulating film on a semiconductor substrate. A window is then opened in this film to expose part of the substrate's surface, utilizing a two-step etching technique that combines dry and wet etching. The exposed substrate area is selectively oxidized to create a tunnel insulating film, which has edge portions that resist dielectric breakdown. Following this, a floating gate, a third gate insulating film, and a control gate are formed sequentially. The floating gate is patterned to either cover the entire tunnel insulating film or intersect only a portion of its edge. This careful design helps relieve stress on the tunnel insulating film, enhancing its resistance to dielectric strength.

Career Highlights

Throughout his career, Kakiuchi has worked with notable companies, including Matsushita Electronics Corporation and Matsushita Electric Industrial Co., Ltd. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.

Collaborations

Kakiuchi has collaborated with several talented individuals in his field, including Kazuo Sato and Hiroshi Yamamoto. These partnerships have fostered a creative environment that has led to advancements in semiconductor memory technology.

Conclusion

Takao Kakiuchi is a distinguished inventor whose work in non-volatile semiconductor memory devices has significantly influenced the technology landscape. His innovative approaches and collaborations have paved the way for advancements in the field, showcasing the importance of creativity and teamwork in driving technological progress.