Patent ID: 8252682
Filing Date: 2012-08-28
Classification: H01L

Abstract:
1. A method for thinning a wafer, comprising: providing a wafer having a plurality of semiconductor chips, the wafer having a first side and a second side opposite the first side, wherein each of the chips includes a set of device structures, each of the device structures being substantially sealed by a liner layer and a barrier layer; providing a wafer carrier, wherein the wafer carrier is attached to the second side of the wafer; thinning the first side of the wafer to a predetermined thickness; recessing the first side of the wafer to partially expose top portions of the liner layer, barrier layer, and the device structures; depositing an isolation layer over the first side of the wafer and the top portions of the liner layer, barrier layer, and the device structures; depositing an insulation layer over the isolation layer; planarizing the insulation layer to expose top portions of the device structures for electrical connection; and depositing a dielectric layer over the planarized first side of the wafer.