Kunio Sakuma

Title: Kunio Sakuma: Innovator in Circuit Substrate Technology

Introduction

Kunio Sakuma is a notable inventor based in Nagano, Japan. He has made significant contributions to the field of circuit substrate technology, particularly in the manufacturing of integrated circuit devices. His innovative approach has led to the development of a unique circuit substrate that enhances the efficiency of semiconductor elements.

Latest Patents

Kunio Sakuma holds a patent for a "Circuit substrate and method for forming bumps on the circuit substrate." This invention is designed for use in manufacturing integrated circuit devices through the strip-support method. The circuit substrate features a base layer and a conductive circuit layer that mechanically and electrically couples to the conductive pads of a semiconductor device. The conductive circuit layer includes multiple finger leads, each equipped with a bump for effective coupling. The bumps have a roughness ranging between 5 and 20 microns, which can be enhanced by plating with nickel and gold. The method for forming these bumps involves several steps, including coating, patterning, half-etching, and the application of protective resist.

Career Highlights

Kunio Sakuma is associated with Seiko Epson Corporation, where he has been instrumental in advancing circuit substrate technology. His work has not only contributed to the company's innovation portfolio but has also positioned Seiko Epson as a leader in the semiconductor manufacturing sector.

Collaborations

Kunio Sakuma has collaborated with Sadasumi Uchiyama, working together to push the boundaries of circuit substrate technology. Their partnership has fostered an environment of innovation and creativity within their projects.

Conclusion

Kunio Sakuma's contributions to circuit substrate technology exemplify the spirit of innovation in the semiconductor industry. His patent and collaborative efforts continue to influence advancements in integrated circuit manufacturing.