Patent ID: 8748307

Claim:
A method for processing a wafer, the method comprising: forming a passivation over the wafer; forming a protection layer over at least a surface of the passivation facing away from the wafer, wherein the protection layer comprises a material that is selectively etchable to a material of the passivation; forming a mask layer over at least a surface of the protection layer facing away from the wafer, wherein the mask layer comprises a material that is selectively etchable to the material of the protection layer; etching the wafer using the mask layer as a mask; selectively etching the material of the mask layer to remove the mask layer from the protection layer, after etching the wafer; selectively etching the material of the protection layer to remove the protection layer from the passivation, after selectively etching the material of the mask layer; and disposing chip packaging material on the passivation after selectively etching the material of the protection layer.