Patent ID: 8242010
Filing Date: 2012-08-14
Classification: H01L,H05K,Y02P,Y10T

Abstract:
1. A method for forming an electrical structure comprising: providing a first substrate comprising a first electrically conductive pad, a second substrate comprising a second electrically conductive pad, and a transfer film comprising a non-solder metallic core structure, wherein said non-solder metallic core structure comprises a cylindrical shape; forming a first solder structure on said first electrically conductive pad; first positioning after said forming said first solder structure, said transfer film such that a first side of said non-solder metallic core structure is in contact with said first solder structure; first heating after said first positioning, said non-solder metallic core structure to a temperature sufficient to cause said first solder structure to melt and form an electrical and mechanical connection between said first side of said non-solder metallic core structure and said first electrically conductive pad; removing after said first heating, said transfer film from said non-solder metallic core structure; forming a second solder structure on said second electrically conductive pad; second positioning, after said forming said second solder structure, said first substrate comprising said non-solder metallic core structure such that a second side of said non-solder metallic core structure is in contact said second solder structure; and second heating after said second positioning, said non-solder metallic core structure to a temperature sufficient to cause said second solder structure solder to melt and form an electrical and mechanical connection between said second side of said non-solder metallic core structure and said second electrically conductive pad resulting in an electrical and mechanical connection between said first electrically conductive pad and said second electrically conductive pad.