Method to build robust mechanical structures on substrate surfaces
View Patent ↗A robust mechanical structure is provided to prevent small foundation structures formed on a substrate from detaching from the substrate surface. The strengthened structure is formed by plating a foundation metal layer on a seed layer and then embedding the plated foundation structure in an adhesive polymer material, such as epoxy. Components, such as spring probes, can then be constructed on the plated foundation. The adhesive polymer material better assures the adhesion of the metal foundation structure to the substrate surface by counteracting forces applied to an element, such as a spring probe, attached to the plated foundation.
1. A support structure comprising:
a substrate;
a metal foundation provided on the substrate and disposed on and entirely above an upper surface of said substrate; and
an adhesive material provided over the substrate contacting sides of the metal foundation,
wherein the metal foundation comprises a well disposed within the metal foundation.
2. The support structure of claim 1 , further comprising a spring probe attached to the metal foundation.
3. A support structure comprising:
a substrate;
a metal foundation provided on the substrate and disposed entirely on and entirely above an upper surface of said substrate; and
an adhesive material provided over the substrate contacting sides of the metal foundation,
wherein the metal foundation comprises:
a first metal seed layer overlying the substrate; and
a second metal layer overlying the first metal seed layer.
4. The structure of claim 3 , wherein the adhesive material layer further contacts a portion of the top surface of the first metal seed layer.
5. The support structure of claim 3 , wherein:
the substrate comprises an organic dielectric provided on a ceramic; and
the adhesive material comprises epoxy.
6. The support structure of claim 3 , wherein a first layer of the substrate comprises a material selected from a group consisting of: a multi-layer ceramic, a multi-layer organic, a metal matrix, a semiconductor, and a metal; and
wherein a second layer comprises a material selected from a group consisting of: polyimide, BCB, FR4, ceramic, a polymer, and a filled polymer.
7. The support structure of claim 3 , further comprising a spring probe attached to the metal foundation.
8. A support structure comprising:
a substrate;
a metal foundation provided on the substrate; and
an adhesive material provided over the substrate contacting sides of the metal foundation,
wherein the foundation has a central polygon shape with anchors extending from the central polygon.
9. The support structure of claim 8 , further comprising: a spring probe attached to the metal foundation.
10. A support structure comprising:
a substrate;
a metal foundation provided on the substrate;
a spring probe attached to the metal foundation; and
a dielectric material over the substrate contacting sides of the metal foundation.
11. The support structure of claim 10 , wherein the dielectric material comprises a polymer.
12. A support structure comprising:
a substrate;
a metal foundation provided on the substrate and disposed on and entirely above an upper surface of said substrate, wherein the metal foundation comprises a well disposed within the metal foundation; and
an adhesive material provided over the substrate contacting sides of the metal foundation,
wherein the adhesive material comprises an epoxy filled with a powder to act as a reinforcing agent.
13. The support structure of claim 12 , wherein the powder comprises at least one in a group consisting of silicon carbide, silicon oxide, silicon nitride, titanium carbide, titanium nitride, titanium oxide, aluminum oxide, and aluminum nitride.
14. The support structure of claim 12 , further comprising a spring probe attached to the metal foundation.
15. A support structure comprising:
a substrate;
a metal foundation provided on the substrate; and
an adhesive material provided over the substrate contacting sides of the metal foundation;
a wire bonded to the metal foundation; and
a resilient material coating the wire.
16. The support structure of claim 15 , wherein the wire and the coating compose a spring probe.