Pei Hsien Fang

Title: Pei Hsien Fang: Innovator in Sapphire Substrate Scribing Technology

Introduction

Pei Hsien Fang is a notable inventor based in Los Altos Hills, California. He has made significant contributions to the field of laser technology, particularly in the scribing of sapphire substrates. With a total of three patents to his name, Fang's work has advanced the capabilities of laser applications in various industries.

Latest Patents

Fang's latest patents include innovative processes for scribing sapphire substrates using solid-state UV lasers. One of his patents describes a system that involves mounting a sapphire substrate, which carries an array of integrated device die, on a movable X-Y stage equipped with a vacuum chuck. The process directs UV pulses of laser energy at the surface of the sapphire substrate, utilizing a solid-state laser. The cutting process is precisely controlled by locating the edges of the substrate to prevent damage to background elements. The laser pulses have a wavelength below about 560 nanometers, with specific energy density, spot size, and pulse duration parameters established to induce ablation of sapphire effectively.

Another patent focuses on the control of the system, allowing for the movement of the stage while maintaining a stationary beam path for the laser pulses. This enables the pulses to contact the sapphire substrate in a scribe pattern, ensuring that successive pulses overlap sufficiently to create precise scribe lines.

Career Highlights

Pei Hsien Fang is currently associated with New Wave Research, a company known for its advancements in laser technology. His work has positioned him as a key figure in the development of innovative solutions for sapphire substrate processing.

Collaborations

Fang has collaborated with notable colleagues, including Kuo-Ching Liu and Jenn Liu, who contribute to the innovative environment at New Wave Research.

Conclusion

Pei Hsien Fang's contributions to the field of laser technology, particularly in sapphire substrate scribing, highlight his role as an influential inventor. His patents reflect a commitment to advancing technology and improving processes in the industry.