Company Filing History:
Years Active: 1999-2001
Title: Innovations by Chia C Chang
Introduction
Chia C Chang is a notable inventor based in Berkeley Heights, NJ (US). She holds 2 patents that showcase her contributions to the field of semiconductor technology. Her work has significantly impacted the development of photodiodes and electrochemical deposition processes.
Latest Patents
One of her latest patents is for a "Pin photodiode having a wide bandwidth." This invention features a PIN photodiode that includes a p region with a p type dopant, an n region with an n type dopant, and an i region positioned between them. A relatively thick, undoped buffer region is placed between the n region and the i region, which effectively decreases the capacitance of the photodiode, maximizing its bandwidth. The buffer region is typically formed from a layer of indium phosphide that is at least approximately 0.5 µm thick.
Another significant patent is for an "Electrodeposition apparatus for coating wafers." This apparatus is designed to deposit metal or conductive layers onto semiconductor wafers through an electrochemical process. It consists of a housing that retains a first electrode (anode) and a second electrode (cathode) in a fixed spaced-apart relation. The anode's surface area exceeds that of the cathode, enhancing the uniformity of the current distribution and the production of reproducible films. The design includes a handling disk and a spring-loaded contact probe to minimize the risk of wafer damage.
Career Highlights
Chia C Chang has worked with prominent companies such as Agere Systems Inc. and Lucent Technologies Inc. Her experience in these organizations has contributed to her expertise in semiconductor technologies and innovations.
Collaborations
Throughout her career, she has collaborated with notable individuals, including Robert Eugene Frahm and Orval George Lorimor. These collaborations have further enriched her work and contributions to the field.
Conclusion
Chia C Chang's innovative patents and career achievements highlight her significant role in advancing semiconductor technology. Her contributions continue to influence the industry and inspire future innovations.