Patent ID: 9576825
Date: 2017-02-21
CPC Classifications: H01L

Claim:
1. Device for alignment of a first contact surface of a first substrate with a second contact surface of a second substrate, said device comprising: a first platform for holding the first substrate, a second platform for holding the second substrate, first detection means configured to detect first X-Y positions of first alignment keys located on the first contact surface of the first substrate in a first X-Y plane in a first X-Y coordinate system which is independent of the motion of the first substrate, second detection means configured to detect second X-Y positions of second alignment keys which correspond to the first alignment keys and which are located on the second contact surface of the second substrate in a second X-Y plane parallel to the first X-Y plane in a second X-Y coordinate system which is independent of the motion of the second substrate, and drive means for moving at least one of the first platform and the second platform to align the first contact surface of the first substrate with the second contact surface of the second substrate, wherein the drive means aligns the first contact surface based on the first X-Y positions in a first alignment position and aligns the second contact surface based on the second X-Y positions in a second alignment position, wherein the first and second X-Y planes in the detection of the first and second X-Y positions are at least quasi-identical to a contacting plane of the first and second contact surfaces during contacting.