Alan W Mitchell

Title: Alan W Mitchell: Innovator in Capacitive Microphone Technology

Introduction

Alan W Mitchell is a notable inventor based in Rio Rancho, NM (US). He has made significant contributions to the field of microphone technology, particularly through his innovative work in capacitive microphones. His expertise and inventions have paved the way for advancements in audio technology.

Latest Patents

Alan W Mitchell holds a patent for the "Fabrication of a surface micromachined capacitive microphone." This patent describes a process for fabricating capacitive microphones using etch-release of sacrificial silicon by an isotropic dry etchant. The method allows for the production of microphones primarily from chemical vapor deposition (CVD) processes, offering flexibility in material selection. Notably, the dry etch chemistry used in this process does not require freeze-drying after release, and it does not attack electrodes or metallized circuitry. This enables the placement of electrodes between the backplate and diaphragm dielectric layers. The inclusion of diffusion barrier layers between the sacrificial and electrode layers protects both materials from interdiffusion during device fabrication. This innovative process is particularly suitable for microphones that utilize silicon nitride dielectric layers with aluminum electrodes.

Career Highlights

Throughout his career, Alan W Mitchell has worked with several prominent organizations. He has been associated with the Alberta Microelectronic Centre and Harris Canada, Inc. These experiences have contributed to his expertise in microelectronic fabrication and microphone technology.

Collaborations

Alan has collaborated with notable individuals in his field, including Yuebin B Ning and R Niall Tait. These collaborations have further enriched his work and contributed to advancements in microphone technology.

Conclusion

Alan W Mitchell's contributions to the field of capacitive microphones demonstrate his innovative spirit and technical expertise. His patent and career achievements reflect a commitment to advancing audio technology through inventive solutions.