Hisayoshi Ohba

Title: **Hisayoshi Ohba: An Innovator in Capacitance Extraction Technologies**

Introduction

Hisayoshi Ohba is a distinguished inventor based in Kawasaki, Japan, with a remarkable portfolio of seven patents. His work primarily revolves around methods and programs that enhance the capabilities of capacitance extraction in electrical engineering, particularly in complex integrated circuits.

Latest Patents

Ohba's latest innovative contributions include a "Method of generating capacitance value rule table for extraction of wiring capacitance" and a corresponding "capacitance value rule table generation program." This invention simplifies the process of generating capacitance value rule tables for multilayer wiring that features complex dielectric constant structures. By extracting construction data of wires adjacent to the wire of interest, the method calculates a common dielectric constant for several insulating films and creates a capacitance value rule table based on this constant.

Another significant patent by Ohba is the "Method of extraction of wire capacitances in LSI devices having diagonal wires and extraction program for the same." This innovation presents a method and program that mitigate the necessity for segmenting during capacitance extraction in LSI devices equipped with diagonal wires. By generating a wire model wherein either the wire of interest or an adjacent wire is adjusted to be parallel to the other, Ohba's method significantly reduces the number of processes required for capacitance extraction.

Career Highlights

Ohba has made significant strides in his career while working at Fujitsu Corporation. His inventive spirit has greatly contributed to advancements in the field of electrical engineering and integrated circuit design. With a keen focus on practical solutions, his patents reflect a deep understanding of the challenges faced in capacitance extraction and electrical wiring.

Collaborations

Throughout his career, Hisayoshi Ohba has collaborated with notable colleagues, including Jun Watanabe and Hideaki Yamauchi. Their teamwork has been instrumental in driving innovation and addressing complex engineering problems, further enhancing the capabilities and efficacy of electrical designs.

Conclusion

Hisayoshi Ohba stands out as a key figure in the world of inventions related to capacitance extraction technologies. With his impressive patent portfolio and dedication to innovation at Fujitsu Corporation, he continues to influence the field and inspire future generations of engineers and inventors.