Patent ID: 8072060
Filing Date: 2011-12-06
Classification: G06K,H01L

Abstract:
1. A semiconductor fingerprint apparatus, comprising: a silicon substrate having a front side and a rear side; a plurality of fingerprint sensing members, disposed on the front side of the silicon substrate, for detecting skin textures of a finger placed on the fingerprint sensing members and thus generating a plurality of electric signals; a set of integrated circuits, formed on the front side of the silicon substrate, for processing the electric signals; a plurality of first bonding pads disposed on the front side of the silicon substrate and electrically connected to the set of integrated circuits; a first insulating layer disposed below the first bonding pads; a plurality of metal plugs penetrating through the silicon substrate and the first insulating layer and electrically connected to the first bonding pads, respectively; a second insulating layer formed on the rear side of the silicon substrate and between the metal plugs and the silicon substrate; a plurality of second bonding pads formed on a rear side of the second insulating layer, wherein the second bonding pads are electrically connected to the first bonding pads through the metal plugs, respectively; and a protection layer, disposed on the front side of the silicon substrate and covering the fingerprint sensing members, for forming a flat touch surface to be touched by the finger.