This inventor holds 3 USPTO granted patents. Top assignee: Super Light Wave Corp.. Active years: 2002-2003.
Company Filing History:
Years Active: 2002-2003
Title: Innovations of Shyang Chang
Introduction
Shyang Chang is a notable inventor based in Hacienda, CA (US). He has made significant contributions to the field of technology, holding a total of 3 patents. His work primarily focuses on improving film deposition techniques and optical logic systems.
Latest Patents
One of his latest patents is an "Adjustable shadow mask for improving uniformity of film deposition using multiple monitoring points along radius of substrate." This invention involves a vacuum chamber that deposits thin films on a substrate by sputtering a target. The beam of atoms or ions from the target is partially blocked by a shadow or adjustable uniformity mask, which reduces the deposition rate onto the substrate. The adjustable uniformity mask features several adjustable fingers that can extend or retract to modify the size of the mask. Each finger covers a different annular region or radius of the substrate, allowing for adjustable deposition rates at various substrate radii. Optical beams monitor the film transmittance at different substrate radii, generating a transmittance profile during deposition. As the process continues, fingers are adjusted to ensure a more uniform film thickness across all radii.
Another significant patent is related to "All optical logic using cross-phase modulation amplifiers and Mach-Zehnder interferometers with phase-shift devices." This invention constructs optical logic gates from Mach-Zehnder Interferometer (MZI) optical circuits. A multi-mode interference (MMI) splitter divides a continuous-wave input into two branches of the interferometer, each equipped with a semiconductor optical amplifier (SOA). When a logic input is applied to one of the SOAs, cross-phase modulation occurs, resulting in a phase shift that enables the production of logic outputs through destructive interference.
Career Highlights
Shyang Chang is currently employed at Super Light Wave Corp., where he continues to innovate and develop new technologies. His work has significantly impacted the fields of optics and materials science.
Collaborations
He collaborates with notable colleagues, including Abraham C Ma and Tzu-Yih Chu, contributing to advancements in their respective fields.
Conclusion
Shyang Chang's innovative patents and contributions to technology demonstrate his expertise and commitment to advancing the field. His work continues to influence the development of new technologies and methodologies.