Patent ID: 9312292
Filing Date: 2016-04-12
CPC Classification: H01L

Claim Text:
1. A manufacturing method of a back side illumination (BSI) image sensor, comprising: providing a substrate having a plurality of photo-sensing elements and a plurality of multilevel interconnects formed on a first side of the substrate; forming a bonding pad and a first insulating layer covering the bonding pad on the first side of the substrate; forming a redistribution layer (RDL) and a second insulating layer covering the RDL on the first insulating layer, the RDL being electrically connected to the bonding pad; providing a carrier wafer formed on the first side of the substrate after forming the RDL and the second insulating layer; performing a wafer thinning process to a second side of the substrate after providing the carrier wafer, the second side being opposite to the first side; forming a color filter array (CFA) on the second side of the substrate after performing the wafer thinning process; removing the carrier wafer; and forming a second opening in the second insulating layer on the first side of the substrate for exposing the RDL after removing the carrier wafer.