Patent ID: 8809923
Filing Date: 2014-08-19
Classification: H01L

Abstract:
1. A backside illuminated imaging sensor, comprising: a semiconductor substrate having a front surface and a back surface, the semiconductor substrate having at least one imaging array and peripheral circuitry of the imaging array formed on the front surface of the semiconductor substrate; a carrier substrate to provide structural support to the semiconductor substrate, the carrier substrate having a material that extends between a first surface and a second surface of the carrier substrate, wherein the first surface of the carrier substrate is bonded to the front surface of the semiconductor substrate, such that the first surface is in direct contact with the front surface; and a re-distribution layer formed in the carrier substrate, wherein the redistribution layer provides a bonding area for the imaging sensor at the second surface of the carrier substrate and routes electrical signals between the peripheral circuitry and the bonding area to transform off-chip connections of the semiconductor substrate from chip scale to board scale, wherein the re-distribution layer comprises a metal trace, a first metal pad, and a second metal pad, wherein the first metal pad is disposed in the carrier substrate at the first surface to couple the metal trace to the peripheral circuitry, and wherein the second metal pad is disposed in the carrier substrate at the second surface coupled to the metal trace to provide the bonding area.