Patent ID: 6391211
Filing Date: 2002-05-21
Classification: H01L,H05K

Abstract:
A method for making a multi-layer circuit board assembly comprising the steps of:providing a first circuit portion having a first conductive surface wherein the first circuit portion comprises a core metal member; providing a second circuit portion having a second conductive surface; selectively applying first solder material to said first conductive surface; inserting said first circuit portion and said second circuit portion into a heated environment effective to cause said first solder material to be substantially liquefied; and moving said first circuit portion and said second circuit portion together in a manner which causes said first solder material to engage portions of said second conductive surface, thereby causing said first solder material to metallurgically bond to said portions of said first and second conductive surfaces, thereby automatically aligning said first circuit portion and said second circuit portion and selectively applying an etch resistant material to portions of said core metal member; and selectively forming at least one first aperture within said core metal member by an etching process; selectively forming a pass through member within said core metal member, wherein the pass through member is formed by use of an etching process and wherein a portion of said first solder material functions as an etchant mask during said etching process, thereby forming said pass through member.