Abstract:
Compliant electrically conductive connection bumps (10) for an adhesive flip chip (12) integrated circuit device and various methods for forming the bumps include the steps of forming polymer bumps (24) on a substrate (12) or an integrated circuit die and coating the polymer bumps with a metallization layer (26). The polymer bump forming step includes the steps of coating a polymer material on a substrate, curing the polymer, and etching the bump pattern from the polymer material. The overcoating step includes electrolessly plating a ductile metal such as gold on the polymer bump.
Abstract:
Compliant electrically conductive connection bumps (10) for an adhesive flip chip (12) integrated circuit device and various methods for forming the bumps include the steps of forming polymer bumps (24) on a substrate (12) or an integrated circuit die and coating the polymer bumps with a metallization layer (26). The polymer bump forming step includes the steps of coating a polymer material on a substrate, curing the polymer, and etching the bump pattern from the polymer material. The overcoating step includes electrolessly plating a ductile metal such as gold on the polymer bump.