Patent ID: 6916684
Filing Date: 2005-07-12
Classification: H01L,Y10T

Abstract:
1. A method of underfilling a bumped component with an underfill material, the method comprising the steps of: laminating a compound film to a surface of the component on which solder bumps are present, the compound film comprising a first layer containing the underfill material and a second layer on the first layer, the underfill material comprising a first polymer material and the second layer comprising a second polymer material that differs from the first polymer material, the compound film being laminated to the component so that the underfill material is forced between the solder bumps and fills spaces between the solder bumps but does not cover the solder bumps and so that the second layer covers the solder bumps; and then selectively removing the second layer to expose the solder bumps and the underfill material between the solder bumps.