Connection component with releasable leads
First Claim
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1. A connection component for making a semiconductor assembly, said component including:
- (a) a support structure including a dielectric structure having a surface;
(b) a plurality of leads extending along the surface of said dielectric structure, each said lead having a first region and a second region, said first region of each said lead being permanently connected to said dielectric structure,(c) a release interface between said second region of said lead and said dielectric structure having a peel strength of less than about 0.35×
106 dynes/cm, whereby said release interface releasably connects said second region to said dielectric structure so that said second region can be detached from the dielectric structure by forcing the lead downwardly relative to the dielectric structure.
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Abstract
A connection component for a microelectronic device such as a semiconductor chip incorporates a dielectric layer and leads extending across a surface of the dielectric layer. Each lead has one end permanently fastened to the dielectric layer and another end releasably bonded to the dielectric layer. The releasable end is held in place by a bond having a relatively low peel strength, desirably less than about 0.35×106 dynes/cm.
126 Citations
21 Claims
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1. A connection component for making a semiconductor assembly, said component including:
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(a) a support structure including a dielectric structure having a surface; (b) a plurality of leads extending along the surface of said dielectric structure, each said lead having a first region and a second region, said first region of each said lead being permanently connected to said dielectric structure, (c) a release interface between said second region of said lead and said dielectric structure having a peel strength of less than about 0.35×
106 dynes/cm, whereby said release interface releasably connects said second region to said dielectric structure so that said second region can be detached from the dielectric structure by forcing the lead downwardly relative to the dielectric structure. - View Dependent Claims (2, 13, 14, 15, 16, 20)
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3. A connection component for making a semiconductor assembly, said component including:
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(a) a support structure including a dielectric structure having a surface and a polymeric material at said surface; (b) a plurality of leads extending along the surface of said dielectric structure, each said lead having a first region and a second region, said first region of each said lead being a permanently connected to said dielectric structure; (c) a release interface between said second region of said lead and said dielectric structure, said release interface releasably connecting said second region to said dielectric structure so that said second region can by detached from the dielectric structure by forcing the lead downwardly relative to the dielectric structure, said release interface including a release metal on said second region of said lead directly abutting said polymeric material at said surface, wherein said interface is formed by electroless plating of said release metal on said polymeric material. - View Dependent Claims (6, 7, 8, 9)
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4. A connection component for making a semiconductor assembly, said component including:
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(a) a support structure including a dielectric structure having a surface and a polymeric material at said surface; (b) a plurality of leads extending along the surface of said dielectric structure, each said lead having a first region and a second region, said first region of each said lead being a permanenty connected to said dielectric structure; (c) a release interface between said second region of said lead and said dielectric structure, said release interface releasably connecting said second region to said dielectric structure so that said second region can be detached from the dielectric structure by forcing the lead downwardly relative to the dielectric structure, said release interface including a release metal on said second region of said lead directly abutting said polymeric material at said surface, wherein said interface is formed by chemical vapor deposition of said release metal on said polymeric material.
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5. A connection component for making a semiconductor assembly, said component including:
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(a) a support structure including a dielectric structure having a surface and a polymeric material at said surface; (b) a plurality of leads extending along the surface of said dielectric structure, each said lead having a first region and a second region, said first region of each said lead being a permanently connected to said dielectric structure; (c) a release interface between said second region of said lead and said dielectric structure, said release interface releasably connecting said second region to said dielectric structure so that said second region can be detached from the dielectric structure by forcing the lead downwardly relative to the dielectric structure, said release interface including a release metal on said second region of said lead directly abutting said polymeric material at said surface, wherein said polymeric material in said release interface is substantially unoxidized.
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10. A connection component for making a semiconductor assembly, said component including:
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(a) a support structure including a dielectric structure having a surface and a polymeric material at said surface; (b) a plurality of leads extending along the surface of said dielectric structure, each said lead having a first region and a second region, said first region of each said lead being permanently connected to said dielectric structure, (c) a release interface between said second region of said lead and said dielectric structure, said release interface releasably connecting said second region to said dielectric structure so that said second region can be detached from the dielectric structure by forcing the lead downwardly relative to the dielectric structure, said release interface including a first release metal bonded to said polymeric material at said surface and a second release metal on said second region of said lead, said second release metal being releasable from said first release metal. - View Dependent Claims (11, 12, 17, 18, 19)
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21. A connection component for making a semiconductor assembly, said component including:
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(a) a support structure including a dielectric structure having a surface including, said first and second zones having different surface conditions; (b) a plurality of leads extending along the surface of said dielectric structure, each said lead having a first region and a second region, said first region of each said lead overlying said first zone of said surface, said second region of each said lead overlying said second zone of said surface, said different surface conditions in said first and second zones providing a release interface having a relatively low peel strength between said lead in said second region and said surface of the dielectric structure and a bond interface having a relatively high peel strength between said lead in said first region and said bottom surface of the dielectric structure, whereby said second region of each said lead can be peeled away from said bottom surface of said dielectric structure and the first region is securely anchored to said bottom surface.
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Specification