Patent ID: 8629011

Claim:
A method of manufacturing a microphone, the method comprising: providing a monolithic wafer structure including a wafer surface, the wafer surface including a first silicon type on the wafer surface in a first horizontal region and a second silicon type on the wafer surface in a second horizontal region surrounding a perimeter of the first horizontal region; epitaxially depositing a hybrid silicon layer monolithically on the wafer surface, the first silicon type acts as a seed material in areas where the hybrid silicon layer contacts the first silicon type on the wafer surface, the second silicon type acts as a seed material in areas where the hybrid silicon layer contacts the second silicon type on the wafer surface, and the hybrid silicon layer acquires characteristics of the seed material such that, after epitaxial deposition, the areas of the hybrid silicon layer above the first horizontal region on the wafer surface include the first silicon type and the areas above the second horizontal region on the wafer surface include the second silicon type; and depositing a CMOS/membrane layer monolithically on the hybrid silicon layer, the CMOS/membrane layer including a membrane positioned above the first horizontal region on the wafer surface, the membrane being supported by an oxide material.