Patent ID: 7265027

Claim:
A method for bonding substrate structures, the method comprising: providing a transparent substrate structure, the transparent substrate structure comprising a face region and an incident light region; providing a spacer structure, the spacer structure comprising a selected thickness of material, the spacer structure having a spacer face region, a spacer device region, and a plurality of spacer side regions extending through the selected thickness of material between the spacer face region and the spacer device region; providing a device substrate structure, the device substrate having a device face region and a device backside region; applying a first glue material to the spacer face region; bonding the spacer face region to the face region of the transparent substrate structure; placing a mask in contact with the spacer device region, thereby defining a contact portion of the spacer device region; selectively applying a second glue material to a bonding portion of the spacer device region and a portion of the plurality of spacer side regions; removing the mask to thereby expose the contact portion of the spacer device region as substantially free from the second glue material; and bonding the spacer device region to the device face region.