Method of making an electronic contact
AssigneeTessera, Inc.
InventorsJoseph Fjelstad, John W. Smith, Thomas H. DiStefano, James Zaccardi, A. Christian Walton
Life of this patent
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Abstract
Microelectronic contacts, such as flexible, tab-like, cantilever contacts, are provided with asperities disposed in a regular pattern. Each asperity has a sharp feature at its tip remote from the surface of the contact. As mating microelectronic elements are engaged with the contacts, a wiping action causes the sharp features of the asperities to scrape the mating element, so as to provide effective electrical interconnection and, optionally, effective metallurgical bonding between the contact and the mating element upon activation of a bonding material.
Claims5
A method of making a microelectronic connector comprising the steps of:
- (a) providing a sheet having a polymeric bottom layer, and at least one metallic layer on said bottom layer;
- (b) selectively removing metallic material from said at least one metallic layer so as to leave a conductive layer thinner than said bottom layer overlying the bottom layer and a plurality of asperities protruding upwardly from said conductive layer;
- and
- (c) subdividing said conductive layer and said bottom layer to form at least one elongated tab, each such tab having at least one said asperity.
A method of making a microelectronic connector comprising the steps of providing a sheet including a metallic layer and a polymeric bottom layer, selectively etching said metallic layer so as to form a plurality of tabs and channel openings between said tabs and thereby expose said bottom layer at the channel openings, and then directing radiant energy through said channel openings so as to ablate the bottom layer in said channel openings, whereby said metallic layer will block radiant energy directed to portions of said bottom layer in said tabs.
Dependencies are inferred from the claim text.