Company Filing History:
Years Active: 1997-1998
Title: Innovations of Hideko Okada in Memory Device Technology
Introduction
Hideko Okada is a prominent inventor based in Osaka, Japan. She has made significant contributions to the field of memory device technology, holding 2 patents that showcase her innovative approach to electronic components.
Latest Patents
Okada's latest patents include a method for forming a memory device by utilizing variations in resistance. This method involves forming first aluminum interconnections on an insulating substrate. In openings created in a silicon dioxide film, unit cells are formed, each consisting of a tungsten electrode and an aluminum alloy electrode containing silicon. A large number of linear second aluminum interconnections are formed over the silicon dioxide film, orthogonal to the first aluminum interconnections. At the intersections of these interconnections, unit cells are arranged to create a memory cell array. When a large current flows through the unit cell, silicon in the aluminum alloy electrode moves in the opposite direction of the current flow, precipitating in the aluminum electrode near the tungsten electrode interface, which increases the resistance value. Conversely, when the current flows in the opposite direction, silicon diffuses, reducing the resistance value. Data can be read by measuring the resistance value with a small current, determining whether it is in a high or low state.
Another notable patent is for a memory device with tungsten and aluminum interconnects, which follows a similar structure and operational principle as the previous patent. This innovation further enhances the efficiency and functionality of memory devices.
Career Highlights
Hideko Okada is currently employed at Matsushita Electric Industrial Co., Ltd., where she continues to develop cutting-edge technologies in the field of electronics. Her work has significantly impacted the advancement of memory devices, making them more efficient and reliable.
Collaborations
Okada has collaborated with notable coworkers such as Shuji Hirao and Kousaku Yano, contributing to a dynamic and innovative work environment.
Conclusion
Hideko Okada's contributions to memory device technology exemplify her innovative spirit and dedication to advancing electronic components. Her patents reflect a deep understanding of materials and their applications in modern technology.