Patent ID: 6910615
Filing Date: 2005-06-28
Classification: B23K,H01L,H05K,Y02P

Abstract:
1. In the fabrication of modular, interconnected components, electrical apparatus, wherein said interconnected components include integrated circuit and discrete types, and, wherein each component element is built into a reflow soldered joined connections, type modular structure, positioned on a substrate, assembly apparatus comprising in combination: means for providing a selectable fusion temperature excursion to said modular structure means for grouping, and positioning on said substrate, a first portion of said components, means for joining said reflow soldered connections of said first portion of said components by applying said fusion temperature excursion to said modular structure positioned on said substrate, means for flux cleaning said reflow soldered connections of said first portion of said components, means for testing said reflow soldered connections of said first portion of said components, means for grouping, and positioning on said substrate, at least one intermediate portion of said components, each said intermediate portion being according to the next to highest tolerable said selectable fusion temperature excursion, means for joining said reflow soldered connections of said intermediate portion of said components by applying said next to highest fusion temperature excursion to said modular structure positioned on said substrate, means for serially flux cleaning and testing in separated tandem stages said reflow soldered connections of each said intermediate portion of said components, means positioned between said flux cleaning and testing stages an inspection and replacement capability stage adapted to detect component connection breakage or absence, means for introducing underfill material into said modular structure positioned on said substrate in an encapsulation stage for said modular structure said introducing means including means adapted to force said underfill material into any space between said substrate and said component and surrounding all contact pads of said component, in the presence of the lowest fusion temperature excursion, means following said underfill introduction for any damage correction,