Patent ID: 6732588
Filing Date: 2004-05-11
Classification: G01L,H04R

Abstract:
A transducer comprisinga first Si-based chip with a first upper surface and a first lower surface opposite the first upper surface and enclosing a first chamber extending from a first opening of the first chamber at the first upper surface and through the first Si-based chip to a second opening at the first lower surface, said first Si-based chip further comprising a first diaphragm that is positioned at the first lower surface and covering the second opening, a second Si-based chip with a second upper surface and a second lower surface, the second Si-based chip enclosing a second chamber extending into the second Si-based chip from a third opening at the second upper surface, the first Si-based chip being positioned on the second Si-based chip with the second opening aligned with the third opening, wherein the second Si-based chip further comprises a Si-based integrated circuit, said Si-based integrated circuit being electrically connected to the first diaphragm via one or more contact elements, and said Si-based integrated circuit being integrated with the second Si-based chip and being positioned at the second upper surface of the second Si-based chip.