Patent ID: 9412717
Filing Date: 2016-08-09
CPC Classification: B29C,H01L

Claim Text:
1. A method, comprising: loading a flip chip substrate comprising at least one flip chip mounted integrated circuit on the flip chip substrate into a selected one of an upper mold chase and a lower mold chase of a mold press at a first temperature, the at least one flip chip mounted integrated circuit electrically coupled to the flip chip substrate; positioning a molded underfill material in at least one of the upper and lower mold chases overlying the flip chip substrate and the at least one flip chip mounted integrated circuit, the molded underfill material contacting the at least one flip chip mounted integrated circuit, while maintaining the upper and lower mold chases at the first temperature which is lower than a melting temperature of the molded underfill material; after the positioning the molded underfill material, closing the upper and lower mold chases together to form a sealed mold cavity and after closing, removing air from the mold cavity to create a vacuum in the mold cavity; after the removing air from the mold cavity, raising the temperature of the molded underfill material to a second temperature greater than the melting temperature of the molded underfill material to cause the molded underfill material to flow over the flip chip substrate and beneath the at least one flip chip mounted integrated circuit, forming an underfill layer and forming an overmolded layer; cooling the flip chip substrate and the mold cavity to a third temperature substantially lower than the melting temperature of the molded underfill material; and subsequently opening the upper and lower mold chases to expose the flip chip substrate for unloading.