Location History:
- South Whitehall Township, Lehigh County, PA (US) (1988)
- Allentown, PA (US) (1994 - 1996)
Company Filing History:
1 out of 4,208 
1 out of 3,345 
1 out of 745 Years Active: 1988-1996
Title: Che-Tsung Chen: Innovator in Integrated Circuit Protection
Introduction
Che-Tsung Chen is a notable inventor based in Allentown, PA (US). He has made significant contributions to the field of integrated circuits, particularly in the area of electrostatic discharge (ESD) protection. With a total of 3 patents, his work has had a considerable impact on the reliability and performance of electronic devices.
Latest Patents
One of Che-Tsung Chen's latest patents addresses the issue of bipolar ESD protection for integrated circuits. CMOS integrated circuit buffers typically utilize a dual-diode ESD protection technique. However, this method can inadvertently cause one of the diodes to conduct when a desired signal voltage is present on the bondpad, leading to signal clipping. This problem often arises when an output buffer on an unpowered device is connected to an active bus or when the input buffer of a 3-volt device receives a 5-volt signal. Chen's invention resolves this issue by employing a bipolar (e.g., pnp) protection transistor connected between the bondpad and a power supply bus (e.g., V.sub.SS). The base of the transistor is linked to the bondpad through a resistor, which introduces a time delay due to the R-C time constant that includes distributed capacitance. This time delay allows for a high conduction period during which an ESD event is conducted through the bipolar transistor, effectively protecting the input or output buffer.
Career Highlights
Throughout his career, Che-Tsung Chen has worked with prominent companies such as AT&T Corp. and AT&T Bell Laboratories. His experience in these organizations has contributed to his expertise in integrated circuit technology and ESD protection.
Collaborations
Some of his notable coworkers include Thaddeus John Gabara and Bernard L. Morris. Their collaboration has likely fostered innovation and advancements in their respective fields.
Conclusion
Che-Tsung Chen's contributions to the field of integrated circuits, particularly in ESD protection, highlight his innovative spirit and technical expertise. His patents reflect a commitment to enhancing the reliability of electronic devices, making him a significant figure in the world of inventions.