Interface structures for electronic devices
First Claim
1. An interface comprising:
- a base surface having an electrically conductive base pad;
a compliant coating over the base surface and base pad, the compliant coating having a coating via extending therethrough to the base pad;
base metallization patterned over the compliant coating and extending into the coating via;
a low modulus dielectric interface layer overlying the compliant coating and having at least one dielectric interface via extending therethrough to the base metallization; and
a floating pad structure comprising floating pad metallization patterned over the dielectric interface layer, a first portion of the floating pad metallization forming a central pad and a second portion of the floating pad metallization forming at least one extension from the central pad and extending into the at least one dielectric interface via, the floating pad structure capable of accommodating thermal and material stresses and permitting movements of the central pad independent of the base pad.
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Accused Products
Abstract
An interface includes a surface having an electrically conductive pad; a compliant coating over the surface having a via extending to the pad; metallization patterned over the compliant coating and extending into the via; a low modulus dielectric interface layer overlying the compliant coating and having an interface via extending to the metallization; and a floating pad structure including floating pad metallization patterned over the dielectric interface layer with a first portion forming a central pad and a second portion forming an extension from the central pad extending into the interface via. Another interface includes a substrate including a low modulus dielectric interface material having a hole extending at least partially therethrough and a floating contact structure including electrically conductive material coating the hole with at least some of the floating pad metallization forming an extension from the hole. A conductive contact area interface may include an electrically conductive first contact area; an electrically conductive second contact area facing and being substantially aligned with the first contact area; and at least one interface structure coupled between the first and second contact areas and including an electrical conductor having a partially open interior to form a compliant joint between the first and second contact areas.
162 Citations
28 Claims
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1. An interface comprising:
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a base surface having an electrically conductive base pad; a compliant coating over the base surface and base pad, the compliant coating having a coating via extending therethrough to the base pad; base metallization patterned over the compliant coating and extending into the coating via; a low modulus dielectric interface layer overlying the compliant coating and having at least one dielectric interface via extending therethrough to the base metallization; and a floating pad structure comprising floating pad metallization patterned over the dielectric interface layer, a first portion of the floating pad metallization forming a central pad and a second portion of the floating pad metallization forming at least one extension from the central pad and extending into the at least one dielectric interface via, the floating pad structure capable of accommodating thermal and material stresses and permitting movements of the central pad independent of the base pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An interface comprising:
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a base surface having an electrically conductive base pad; a compliant coating over the base surface and base pad, the compliant coating having a coating via extending therethrough to the base pad; base metallization patterned over the compliant coating and extending into the coating via; a floating pad structure situated above the base metallization and compliant coating and comprising floating pad metallization, a first portion of the floating pad metallization forming a central pad and a second portion of the floating pad metallization forming at least two extensions from the central pad, the at least two extensions being coupled to the base metallization, the floating pad structure capable of accommodating thermal and material stresses and permitting movements of the central pad independent of the base pad.
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17. A method for fabricating an interface comprising the steps of:
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applying a compliant coating over a base surface having an electrically conductive base pad; forming a coating via extending in the compliant coating extending to the base pad; applying and patterning a base metallization over the compliant coating and into the coating via; applying a low modulus dielectric interface layer over the compliant coating; forming at least one dielectric interface via extending through the dielectric interface layer to the base metallization; and applying a floating pad structure comprising floating pad metallization patterned over the dielectric interface layer, a first portion of the floating pad metallization forming a central pad and a second portion of the floating pad metallization forming at least one extension from the central pad and extending into the dielectric interface via, the floating pad structure capable of accommodating thermal and material stresses and permitting movements of the central pad independent of the base pad. - View Dependent Claims (18, 19, 20)
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21. An interface comprising:
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a substrate including a low modulus dielectric interface material having at least one hole extending at least partially therethrough; and a metallized floating pad contact structure comprising electrically conductive material coating the at least one hole, at least some of the metallized floating pad contact structure forming at least one extension from the at least one hole. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification