Patent ID: 9748206
Date: 2017-08-29
CPC Classifications: H01L

Claim:
1. A method for forming a stacking structure, comprising: providing a first wafer with a first bonding structure, wherein the first wafer has at least one first bonding region and at least one first non-bonding region; forming an anti-bonding layer in the at least one first non-bonding region of the first wafer and covering top surfaces of contact pads of the first bonding structure; providing a second wafer with a second bonding structure, wherein the second wafer has at least one second bonding region and at least one second non-bonding region; bonding the second bonding structure of the second wafer with the first bonding structure of the first wafer; forming grooves in the second wafer between the at least one second bonding region and the at least one second non-bonding region; removing the at least one second non-bonding region of the second wafer and exposing the anti-bonding layer in the at least one first non-bonding region of the first wafer; forming a material layer covering the remained second wafer and the anti-bonding layer in the at least one first non-bonding region of the first wafer; and etching the material layer to form a spacer protective structure surrounding the remained second wafer and remove at least a portion of the anti-bonding layer to expose the top surfaces of the contact pads.