Patent ID: 7645410
Filing Date: 2010-01-12
Classification: H01L,Y10T

Abstract:
1. A method for making a preform of thermoplastic adhesive having a curved surface, said method including the steps of: placing a desired volume of thermoplastic adhesive in a mold having opposing concave inner surfaces; applying heat and pressure to the volume of thermoplastic adhesive until it conforms to the concave inner surfaces of the mold, thereby forming a thermoplastic preform having opposing convex outer surfaces; pinching the thermoplastic adhesive at the edges, thereby forcing the thermoplastic adhesive to flow to a center of the mold to form a shape having convexly curved opposing surfaces; establishing the desired volume of thermoplastic adhesive to form a bond and cutting a web with a punch blade against a die; and allowing gases to escape from the concave inner surfaces of the mold.