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Method of and apparatus for forming three-dimensional structures integral with semiconductor based circuitry

  • US 20040004001A1
  • Filed: 05/07/2003
  • Published: 01/08/2004
  • Est. Priority Date: 05/07/2002
  • Status: Abandoned Application
First Claim
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1. An electrochemical fabrication process for producing a three-dimensional structure from a plurality of adhered layers, the process comprising:

  • (A) selectively depositing at least a portion of a layer onto the substrate, wherein the substrate may comprise previously deposited material;

    (B) forming a plurality of layers such that successive layers are formed adjacent to and adhered to previously deposited layers, wherein said forming comprises repeating operation (A) a plurality of times;

    wherein at least a plurality of the selective depositing operations comprise;

    (1) locating a mask on or in proximity to a substrate;

    (2) in presence of a plating solution, conducting an electric current between an anode and the substrate through the at least one opening in the mask, such that a selected deposition material is deposited onto the substrate to form at least a portion of a layer; and

    (3) separating the selected preformed mask from the substrate;

    wherein the substrate comprises a semiconductor wafer or single die containing electrical circuitry and having contact pads to which structural material is to connect; and

    wherein the process of contacting the contact pads with structural material comprises treating the wafer or die with a transition treatment and then applying a structural material to the contact pads by application of an electroless plating solution to the contact pads for a sufficient time to form a deposition of desired thickness.

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