Patent ID: 9241221
Filing Date: 2016-01-19
CPC Classification: H04R

Claim Text:
1. A thermoacoustic chip comprising a shell and a speaker located in the shell, the shell having a hole, the speaker comprising: a substrate, wherein the substrate comprises a silicon wafer defining a concave-convex structure comprising a plurality of grooves and a plurality of bulges alternately located on a surface of the silicon wafer and an insulating layer located on and covering the surface of the silicon wafer; a sound wave generator located on the substrate and opposite to the hole of the shell; a first electrode; and a second electrode, wherein the first electrode and the second electrode are spaced from each other and electrically connected to the sound wave generator, and the first electrode, the second electrode, and the sound wave generator are located on a surface of the insulating layer and insulated from the silicon wafer through the insulating layer.