Patent ID: 9648427
Date: 2017-05-09
CPC Classifications: H01L,H04R

Claim:
1. A MEMS microphone comprising: an ASIC chip; a MEMS chip located directly on the ASIC chip and electrically connected to the ASIC chip via a connector, the MEMS chip comprising a substrate having a cavity, a back plate and a diaphragm formed in the cavity for forming a capacitor structure; an injection molding package embedding the MEMS chip and the ASIC chip therein; wherein the cavity is divided by the capacitor structure into a rear acoustic cavity facing the ASIC chip and a front acoustic cavity opposite to the rear acoustic cavity, the rear acoustic; the rear acoustic cavity is formed by the capacitor structure and a part of the substrate, and the front acoustic cavity is formed by the capacitor structure and another part of the substrate: a separation net is located on the another part of the substrate and covering the front acoustic cavity.