Location History:
- Tokyo, JP (2009 - 2016)
- Ibaraki, JP (2017)
Company Filing History:
3 out of 7,529 
1 out of 3,781 
Years Active: 2009-2017
Title: Katsuhiro Torii: Innovator in Semiconductor Technology
Introduction
Katsuhiro Torii is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 4 patents. His work focuses on improving the reliability and efficiency of semiconductor devices.
Latest Patents
One of his latest patents is a semiconductor device and manufacturing method. This semiconductor device includes a semiconductor substrate, a pad electrode formed on the substrate, and a post electrode made of a copper film. Additionally, it features a solder ball electrode made of a ternary alloy containing tin, which is connected to a terminal on a wiring board. The design includes a sealing material that fills the gap between the semiconductor substrate and the wiring board. The post electrode is designed with a cylindrical stem portion and an overhanging portion that protrudes outward, ensuring effective contact with the sealing material.
Another notable patent is a manufacturing method for semiconductor devices. This method involves forming an Ni/Au film over a wiring that connects to multiple electrode pads on a semiconductor wafer. The process includes grinding the back surface of the wafer, performing reduction treatment on the Ni/Au film, and forming a solder bump over it. This method enhances bonding reliability in flip chip bonding of semiconductor devices.
Career Highlights
Katsuhiro Torii has worked with leading companies in the semiconductor industry, including Renesas Electronics Corporation and Renesas Technology Corporation. His experience in these organizations has allowed him to develop innovative solutions that address critical challenges in semiconductor manufacturing.
Collaborations
Throughout his career, Torii has collaborated with notable colleagues such as Akira Yajima and Hideki Harano. These partnerships have contributed to the advancement of semiconductor technologies and have fostered a collaborative environment for innovation.
Conclusion
Katsuhiro Torii's contributions to semiconductor technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence the development of reliable and efficient semiconductor devices.