Patent ID: 9685187
Date: 2017-06-20
CPC Classifications: B32B,G11B,H01L

Claim:
1. A bonding tool for alignment comprising: a stage and a carrier; wherein: the stage comprises a stage top surface, a stage bottom surface, and a plurality of vacuum apertures extending therebetween, wherein the stage top surface comprises one or more rough stage surface portions having an average roughness of between 50 nm and 150 nm; the carrier comprises a carrier bottom surface, wherein the carrier bottom surface comprises one or more smooth carrier surface portions having an average roughness of less than 50 nm and one or more rough carrier surface portions having an average roughness of between 50 nm and 150 nm; at least one smooth carrier surface portion of the one or more smooth carrier surface portions having an average roughness of less than 50 nm laterally aligns to at least one vacuum aperture of the plurality of vacuum apertures when the carrier bottom surface couples to and opposes the stage top surface; and at least one rough carrier surface portion of the one or more rough carrier surface portions having an average roughness of between 50 nm and 150 nm frictionally couples to the at least one rough stage surface portion having an average roughness of between 50 nm and 150 nm such that frictional force counteracts lateral movement of the carrier relative to the stage.