Patent ID: 7791209

Claim:
A method of underfill encapsulation of a flip-chip assembly comprising: providing a semiconductor die having a top surface and a bottom surface wherein said bottom surface is in physical communication with a machine stage; wherein the semiconductor die further comprises a laminate having a through hole, dispensing underfill resin in a continuous manner at all peripheral edges of said semiconductor die; providing a vacuum suction device, wherein the vacuum suction device provides a suction force on the laminate to enable underfill to spread from all peripheral edges simultaneously such that an excessive underfill resin protrudes from the through hole; wherein the machine stage comprises a head mechanism having a pressure sensor and re-usable tape which attracts the excessive underfill resin; and disposing a cleaning pad at a bottom side of said head mechanism to contact the re-usable tape and clean the excessive underfill resin off of the re-usable tape.