This inventor holds 5 USPTO granted patents. Top assignees: Nec Corporation, Elpida Memory, Inc., Renesas Eastern Japan Semiconductor, Inc.. Active years: 1998-2009.
Company Filing History:
3 out of 36,636 
2 out of 1,458 
1 out of 30 
Years Active: 1998-2009
Title: The Innovations of Hisashi Abo: A Pioneer in Semiconductor Technology
Introduction
Hisashi Abo is a distinguished inventor based in Tokyo, Japan, recognized for his contributions to semiconductor technology. With a remarkable portfolio of five patents, Mr. Abo has an impressive track record of developing innovative solutions that enhance memory devices and data bus systems.
Latest Patents
One of Mr. Abo's latest patents involves a semiconductor unit characterized by having two device terminals for every one input/output signal. This innovation features a memory chip along with a package substrate that incorporates three wiring layers. The power-supply surfaces, referred to as the VDD surface and the GND surface, are meticulously wired on the package substrate. An intra-package DQ bus is integrated on an intermediate layer between both power-supply surfaces. Furthermore, the memory device boasts two DQ pins for each intra-package DQ bus, which connects to a signal terminal pad of the memory chip via a specially designed via hole.
Another significant patent addresses a method, memory system, and memory module board aimed at preventing local impedance mismatches around memory chips. This inventive approach entails a data bus signal line comprising first wires on a first board and a second wire on a second board. The second board is affixed to the first board, facilitating a serial connection between the two wires. The impedance of the second wire is cleverly determined by the additional capacitance of the semiconductor device installed on the second board, ensuring harmonic compatibility with the first board's impedance.
Career Highlights
Throughout his career, Hisashi Abo has lent his expertise to leading companies in the semiconductor industry, notably NEC Corporation and Elpida Memory, Inc. His work within these renowned organizations has significantly impacted the advancement of memory technologies in the market.
Collaborations
Mr. Abo has collaborated with several talented individuals in the field, among whom are Seiji Funaba and Takao Ono. These collaborations have fostered the exchange of ideas and innovations that have propelled the development of cutting-edge semiconductor solutions.
Conclusion
Hisashi Abo continues to be a driving force in semiconductor innovations, with a remarkable ability to bridge technical challenges through inventive solutions. His extensive portfolio and collaborative spirit reflect his dedication to advancing technology, making him a notable figure in the field of semiconductor engineering.