Patent ID: 9636782
Date: 2017-05-02
CPC Classifications: B23K,G01R,H01L,Y10T

Claim:
1. A method for handling a device wafer, comprising: depositing a film of metal material on a surface of a silicon handler water to form a metal layer on the surface of the silicon handler wafer, wherein the metal layer serves as a releasable layer and has a thickness in a range of 5 nanometers to less than 100 nanometers; forming a polymer adhesive layer on at least one of the metal layer and a surface of a device wafer; bonding the device wafer to the silicon handler wafer using the polymer adhesive layer, wherein the device wafer and the silicon handler wafer are separate wafers; processing the device wafer while bonded to the silicon handler wafer; and debonding the device wafer and the silicon handler wafer by irradiating the metal layer with infrared energy through the silicon handler wafer to substantially or completely vaporize the metal layer such that the device wafer is released from the silicon handler wafer as a direct result of the substantial or complete vaporization of the metal layer, wherein a wavelength of the infrared energy is in a range of about 1.12 μm to about 5 μm.