Noriaki Oka

Title: Noriaki Oka: Innovator in Semiconductor Technology

Introduction

Noriaki Oka is a prominent inventor based in Kodaira, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 3 patents. His work focuses on innovative methods for manufacturing semiconductor devices, which are crucial for modern electronics.

Latest Patents

One of Oka's latest patents is a method of manufacturing through holes in a semiconductor device. This patent describes a process where first through holes of a relatively small diameter and second through holes of a relatively great diameter are formed in proper shapes by separate processes in a first layer insulating film. The second through holes are tapered toward a layer underlying the first layer insulating film. Initially, the first through holes are formed and filled with plug electrodes, followed by the formation of the second through holes. The process includes etching back a first conductive film to fill the first through holes and removing residues from the side walls of the second through holes.

Another notable patent is for a semiconductor integrated circuit. This invention features a semiconductor integrated circuit with three or more layers of wiring, equipped with a plurality of lines of bonding pads arranged along the outer peripheral portion of a semiconductor chip. The bonding pads are arranged in a zigzag manner, facilitating efficient electrical connections between the bonding pads and internal circuits.

Career Highlights

Noriaki Oka is associated with Hitachi, Ltd., a leading company in the technology sector. His work at Hitachi has allowed him to push the boundaries of semiconductor technology, contributing to advancements that benefit various electronic applications.

Collaborations

Oka has collaborated with notable colleagues such as Shigeo Ogasawara and Shigeru Takahashi. These collaborations have fostered an environment of innovation and have led to the development of groundbreaking technologies in the semiconductor field.

Conclusion

Noriaki Oka's contributions to semiconductor technology through his patents and work at Hitachi, Ltd. highlight his role as a key innovator in the industry. His inventions continue to influence the development of modern electronic devices.