Location History:
- South Easton, MA (US) (2002)
- North Easton, MA (US) (2004)
Company Filing History:
Years Active: 2002-2004
Title: Innovations by Shirong Liao
Introduction
Shirong Liao is a notable inventor based in North Easton, MA (US). He has made significant contributions to the field of semiconductor technology, holding 2 patents that showcase his innovative approach to improving electronic devices.
Latest Patents
One of his latest patents is for an electrode for p-type gallium nitride-based semiconductors. This invention discloses an improved electrode that includes a layer of oxidized metal along with a first and second layer of metallic material. The electrode is formed by depositing three or more metallic layers over the p-type semiconductor layer, ensuring that at least one metallic layer is in contact with the p-type semiconductor layer. The process involves subjecting at least two of the metallic layers to an annealing treatment in the presence of oxygen, which oxidizes at least one of the metallic layers to form a metal oxide. This innovation provides good ohmic contacts to p-type gallium nitride-based semiconductor materials, thereby lowering the operating voltage of gallium nitride-based semiconductor devices.
Another significant patent by Liao is related to the method of manufacturing GaN-based p-type compound semiconductors and light-emitting diodes (LEDs). In this method, compound semiconductor material is irradiated with x-ray radiation to activate a dopant material. This approach improves active carrier concentration efficiency compared to known methods, including conventional thermal annealing. The method is applicable to III-V group compounds, including GaN-based semiconductors, doped with p-type material to form low resistivity p-GaN. It can also be employed to manufacture GaN-based LEDs, including blue LEDs, which exhibit improved forward bias voltage and light-emitting efficiency.
Career Highlights
Shirong Liao is currently associated with Kopin Corporation, where he continues to work on advancing semiconductor technologies. His expertise and innovative mindset have positioned him as a valuable asset in the field.
Collaborations
Liao has collaborated with notable colleagues, including Hong K Choi and John C C Fan, contributing to various projects that enhance semiconductor applications.
Conclusion
Shirong Liao's contributions to semiconductor technology through his patents reflect his commitment to innovation and excellence in the field. His work continues to influence the development of more efficient electronic devices.