Patent ID: 8722446
Filing Date: 2014-05-13
Classification: H04R,Y10T

Abstract:
1. A method of manufacturing an acoustic sensor, the method comprising: forming a recess region in a substrate and an acoustic chamber definition layer surrounding the recess region and having a lower bottom surface than the recess region; forming a lower electrode including a first hole provided in the substrate of the recess region and a second hole provided inside the acoustic chamber definition layer at the external of the recess region; forming a diaphragm facing the lower electrode with a vibration space therebetween, on a lower electrode corresponding to the recess region, the diaphragm including a lower surface facing the lower electrode and an upper surface opposite to the lower surface, and a side connecting the lower surface and the upper surface; forming diaphragm supporters on the lower electrode, the diaphragm supporters including a bottom surface facing the lower electrode and a top surface opposite to the bottom surface, a side connecting the bottom surface and the to surface, wherein the diaphragm and the diaphragm supports are disposed side by side such that the side of the diaphragm comes in contact with the side of the diaphragm supporters; and forming an acoustic chamber by etching the substrate inside the acoustic chamber definition layer through an etching window provided at a side of the diaphragm and the first and second holes connected to the vibration space.