Patent ID: 9646860
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A wafer bonding system, comprising: a first support having a first wafer mounting side for supporting a first wafer, and a first backside opposite the first wafer mounting side; a second support having a second wafer mounting side for supporting a second wafer, and a second backside opposite the second wafer mounting side; an infrared (IR) charge coupled device (CCD) configured to emit IR energy towards and through the first support and first wafer, the IR CCD being external to the first support and the second support and at least a portion of the IR CCD proximate the first backside of the first support, the IR CCD device configured to emit IR energy when the second wafer approaches the first wafer and when the second wafer makes contact and begins bonding with the first wafer; a motor coupled to the second support; a linear variable displacement transducer (LVDT) coupled to the first support or the second support and in communication with the IR CCD and the motor, wherein the LVDT is at least partially embedded in the first support or the second support, the LVDT configured to communicate with the IR CCD and the motor when the second wafer approaches the first wafer and when the second wafer makes contact with the first wafer; and a thermal control module coupled to the first support.