Interposer with Electrical Contact Button and Method

Abstract

An interposer having one or more hollow electrical contact buttons disposed in a carrier. The interposer is formed by disposing sacrificial posts in vias of the carrier. The electrical contact buttons are formed on the sacrificial posts by a metallizing process in desired pattern using a mask. The sacrificial posts are made of a material that thermally decomposes upon application of heat without altering the carrier or the electrical contact buttons.

1 . A method for fabricating a plurality of electrical contacts in a land grid array comprising:
 laminating to a carrier a preformed metallic pattern of contact buttons in registry with a plurality of vias in said carrier; and   removing laminated metal from said carrier in between said contact buttons.   
   
   
       2 . The method of  claim 1 , wherein the metal of said pattern is selected from the group consisting of: foil and sheet metal.