Location History:
- Ibaraki, JP (1993)
- Fujishiro-machi, JP (1998 - 2000)
- Ibaraki-ken, JP (1996 - 2005)
Company Filing History:
11 out of 29,297 
9 out of 42,517 
1 out of 832,912 Years Active: 1993-2005
Title: Innovations of Songsu Cho in Semiconductor Technology
Introduction
Songsu Cho is a prominent inventor based in Ibaraki-ken, Japan, known for his significant contributions to semiconductor technology. With a total of 13 patents to his name, Cho has made remarkable advancements in the field of integrated circuit devices, particularly in memory devices.
Latest Patents
One of Cho's latest patents focuses on a method of manufacturing semiconductor integrated circuit devices that feature a memory device with reduced bit line stray capacity. In this innovation, a DRAM is designed with multiple word lines, each covered with a first insulating film. Additionally, the design includes a plurality of bit lines that are insulated from and transverse to the word lines, covered with a second insulating film. Memory cells are strategically placed at the intersections of the word and bit lines, incorporating capacitors and memory cell selection transistors. The contact holes for connections between semiconductor regions and capacitors, as well as between semiconductor regions and bit lines, are formed in self-alignment. Notably, the second insulating film is made from a material with a permittivity smaller than that of the first insulating film.
Career Highlights
Throughout his career, Songsu Cho has worked with notable companies such as Texas Instruments Corporation and Hitachi, Ltd. His experience in these leading technology firms has greatly influenced his innovative work in semiconductor devices.
Collaborations
Cho has collaborated with esteemed colleagues, including Yoshitaka Tadaki and Toshihiro Sekiguchi, contributing to the advancement of semiconductor technologies through teamwork and shared expertise.
Conclusion
Songsu Cho's contributions to semiconductor technology, particularly in the development of memory devices, highlight his role as a key innovator in the field. His patents reflect a deep understanding of integrated circuit design and manufacturing processes, paving the way for future advancements in technology.