Patent ID: 7172927

Claim:
A method for controlling warpage of a package strip during curing, the package strip including a plurality of integrated circuit dies encapsulated on a package substrate, the method comprising: clamping edges of the package substrate to hold the package substrate in a position to decrease cure-induced warpage of the package substrate during curing of the encapsulant, wherein clamping comprises engaging a major surface portion of the package substrate near an edge of the package substrate with non-zero angled fins disposed at a non-zero angle to the major surface to apply a force to the package substrate to cause an initial deformation to the package substrate to counter an expected cure-induced warpage of the encapsulant on the package substrate; curing the encapsulant; releasing the edges of the cured package substrate; and partially curing the encapsulant before clamping the edges of the package substrate.