Company Filing History:
7 out of 42,508 
4 out of 182 
1 out of 4 Years Active: 1987-1996
Title: Masahiro Yoshida: Innovator in Semiconductor Memory Technology
Introduction
Masahiro Yoshida is a prominent inventor based in Tachikawa, Japan. He has made significant contributions to the field of semiconductor memory devices, holding a total of eight patents. His innovative work has advanced the capabilities of memory technology, particularly in enhancing speed and efficiency.
Latest Patents
One of Yoshida's latest patents involves a multiport semiconductor memory device that allows for both random access and serial access. This invention aims to reduce parasitic capacitance and improve operating speed by dividing the serial input/output lines into two parts at their midpoints. The design includes sense amplifiers positioned at both ends of the serial access memory elements to amplify signals from the divided lines. Additional features enhance both serial and random operations. For instance, during the serial read mode, the column selector for random access operates simultaneously, allowing read data to be utilized as head data for the serial output operation. Furthermore, a serial selector can be controlled by a select signal generated by a Gray Code counter, which improves operating speed. The invention also incorporates a redundancy system to address defective bits, utilizes common bit lines to enhance integration density, and features an improved refreshing arrangement to minimize power consumption during refresh modes.
Career Highlights
Yoshida has had a distinguished career, working with notable companies such as Hitachi, Ltd. and Hitachi VLSI Engineering Corporation. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
Throughout his career, Yoshida has collaborated with talented individuals, including Katsuyuki Sato and Miki Matsumoto. These partnerships have fostered a creative environment that has led to significant advancements in memory technology.
Conclusion
Masahiro Yoshida's contributions to semiconductor memory devices have made a lasting impact on the industry. His innovative patents and collaborative efforts continue to shape the future of memory technology.