Patent ID: 6875632

Claim:
A method for underfilling a semiconductor device assembly comprising at least one semiconductor device conductively mounted on a carrier substrate in spaced relationship thereto, comprising: securing the carrier substrate to a tiltable support with the at least one semiconductor device above the carrier substrate; tilting the tiltable support to orient the carrier substrate at a nonhorizontal angle; progressively immersing the oriented carrier substrate and the at least one semiconductor device in a reservoir of photopolymerizable liquid resin to cause the liquid resin to flow between the carrier substrate and the at least one semiconductor device; reorienting the carrier substrate to a substantially horizontal attitude and to a selected depth within the liquid resin; and exposing selected portions of the liquid resin over the carrier substrate and adjacent a lateral periphery of the at least one semiconductor device on the carrier substrate to a directed radiation beam to initiate polymerization of the liquid resin and form at least a semisolid peripheral dam structure about the at least one semiconductor device with a pool of the liquid resin lying within the dam structure and between the at least one semiconductor device and the carrier substrate.