Connector design for packaging integrated circuits
First Claim
Patent Images
1. A device comprising:
- a top dielectric layer having a top surface;
a metal pillar comprising a portion over the top surface of the top dielectric layer;
a metal cap over the metal pillar, wherein a portion of the metal cap is aligned to the metal pillar, and wherein the metal cap has a lateral size greater than a lateral size of the metal pillar;
a first non-wetting layer on a sidewall of the metal cap, wherein the first non-wetting layer is not wettable to molten solder; and
a solder region over and electrically coupled to the metal cap.
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Abstract
A device includes a top dielectric layer having a top surface. A metal pillar has a portion over the top surface of the top dielectric layer. A non-wetting layer is formed on a sidewall of the metal pillar, wherein the non-wetting layer is not wettable to the molten solder. A solder region is disposed over and electrically coupled to the metal pillar.
101 Citations
11 Claims
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1. A device comprising:
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a top dielectric layer having a top surface; a metal pillar comprising a portion over the top surface of the top dielectric layer; a metal cap over the metal pillar, wherein a portion of the metal cap is aligned to the metal pillar, and wherein the metal cap has a lateral size greater than a lateral size of the metal pillar; a first non-wetting layer on a sidewall of the metal cap, wherein the first non-wetting layer is not wettable to molten solder; and a solder region over and electrically coupled to the metal cap. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device comprising:
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a metal pillar comprising a portion over a top surface of a top dielectric layer; a metal cap over the metal pillar, wherein a portion of the metal cap is aligned to the metal pillar, and wherein the metal cap has a lateral size greater than a lateral size of the metal pillar; a first non-wetting layer on a sidewall of the metal cap, wherein the first non-wetting layer is not wettable to molten solder; and a solder region over and electrically coupled to the metal cap, wherein the first non-wetting layer does not extend between the metal cap and the solder region. - View Dependent Claims (8, 9, 10, 11)
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Specification