Patent ID: 6908789

Claim:
A method of making a microelectronic assembly, comprising: improving wetting and flow characteristics of a no-flow underfill material by preheating the no-flow underfill material; assembling a construction including a carrier substrate, a microelectronic die having an integrated circuit, and the no-flow underfill material between the carrier substrate and the microelectronic die, the wetting characteristics having been improved before the construction, including the carrier substrate, the microelectronic die and the no-flow underfill material, is assembled; reflowing interconnection elements between the carrier substrate and the microelectronic die of the construction by heating and subsequently allowing the interconnection elements to cool; and curing the no-flow underfill material of the construction by heating the no-flow underfill material for a period of time sufficient to harden the no-flow underfill material.