Company Filing History:
Years Active: 2008-2011
Title: Koji Shimosako: Innovator in Semiconductor Memory Technology
Introduction
Koji Shimosako is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of semiconductor memory technology, holding a total of 2 patents. His innovative work focuses on improving the efficiency and reliability of memory cells.
Latest Patents
Shimosako's latest patents include advancements in semiconductor memory. One patent describes a design where dummy memory cells are strategically placed outside of real memory cells in a matrix. This configuration allows for first contacts that couple two wiring layers on a semiconductor substrate to be shared among adjacent real and dummy memory cells. By reducing the number of first contacts in dummy memory cells compared to real memory cells, the design effectively prevents abnormal power supply currents from affecting the dummy cells, thus avoiding latch-up occurrences.
Another patent addresses the write margin of SRAM cells by controlling power supply voltages to inverters through corresponding bit lines. Each memory cell consists of a pair of inverters that hold complementary data in their storage nodes. During write operations, the power control circuit adjusts the power supply voltage of the inverter receiving a low level to be lower than that of the inverter receiving a high level. This adjustment enhances the write margin of the memory cell, facilitating easier transitions to low levels.
Career Highlights
Throughout his career, Koji Shimosako has worked with notable companies, including Fujitsu Corporation and Fujitsu Semiconductor Limited. His experience in these organizations has allowed him to refine his expertise in semiconductor technologies and contribute to various innovative projects.
Collaborations
Shimosako has collaborated with several professionals in the field, including Yasuhiko Maki. Their joint efforts have further advanced the development of semiconductor memory technologies.
Conclusion
Koji Shimosako's contributions to semiconductor memory technology demonstrate his innovative spirit and commitment to enhancing memory cell efficiency. His patents reflect a deep understanding of the complexities involved in semiconductor design, making him a valuable figure in the industry.