Patent ID: 7144471

Claim:
A method for bonding an integrated circuit to a substrate using heat without deforming an adjacent part of said substrate having a color filter bonded thereto and a polarizer bonded onto a face of said color filter opposite said substrate, said substrate comprising an epoxy resin reinforced with fiberglass, said method comprising the steps of: positioning a face of said integrated circuit adjacent to a face of said substrate with a thermosetting resin between said integrated circuit and said substrate; supporting an opposite face of said substrate; positioning a face of a resilient sheet adjacent to an opposite face of said integrated circuit; positioning a block against an opposite face of said resilient sheet and pressing said block against said resilient sheet to force said integrated circuit toward said substrate; heating said block to heat said opposite face of said integrated circuit; applying heat to said opposite face of said substrate concentrated in a region opposite said integrated circuit by irradiating said substrate with near infrared light while avoiding direct heating of said substrate peripheral of said region opposite said color filter and said polarizer, some energy of said light being absorbed by said substrate and some energy of said light passing through said substrate to said resin; and during the steps of heating said block and applying heat to said opposite face of said substrate, cooling a portion of said resilient sheet peripheral to said integrated circuit adjacent to said color filter and said polarizer to reduce indirect heating of said color filter and said polarizer from said block via said resilient sheet; wherein the step of cooling comprises the step of discharging a gas against said portion of said resilient sheet peripheral to said integrated circuit adjacent to said color filter and said polarizer.