Wen H Hsieh

Title: Innovations of Wen H Hsieh in Microphone Technology

Introduction

Wen H Hsieh is a notable inventor based in Arcadia, CA (US), recognized for his contributions to microphone technology. He holds 2 patents that showcase his innovative approach to sound transduction.

Latest Patents

His latest patents focus on the development of thin film electret microphones. These microphones utilize micro-machining technology to create an electret formed on a support surface. The design includes a self-powered electret sound transducer, which is manufactured as a two-piece unit comprising a microphone membrane unit and a microphone back plate. This configuration allows the microphone to produce a signal without the need for external biasing, thus reducing system volume and complexity. The electret material used is a thin film of spin-on polytetrafluoroethylene (PTFE), and an electron gun is employed for charge implantation. The electret achieves a saturated charged density ranging from about 2×10 C/m to about 8×10 C/m. Thermal annealing is applied to stabilize the implanted charge, resulting in an open circuit sensitivity of approximately 0.5 mV/Pa for a hybrid microphone package.

Career Highlights

Wen H Hsieh is affiliated with the California Institute of Technology, where he continues to advance his research in microphone technology. His work has led to the fabrication and testing of prototype micro-machined electret microphones, further establishing his reputation in the field.

Collaborations

Wen has collaborated with notable colleagues, including Yu-Chong Tai and Tseng-Yang Hsu, who have contributed to his research endeavors.

Conclusion

Wen H Hsieh's innovative work in the field of microphone technology exemplifies the impact of micro-machining technology on sound transduction. His patents reflect a commitment to enhancing the quality and efficiency of electret microphones, paving the way for future advancements in audio technology.