Package-on-package interconnect stiffener
First Claim
1. A semiconductor assembly, comprising:
- a first semiconductor package having a plurality of inter-package contact pads on a top side and a plurality of second level interconnect (SLI) pads on a bottom side; and
a planar stiffener having a first plurality of planar contact pads on a top side of the stiffener electrically connected to a second semiconductor package, and a second plurality of planar contact pads on a bottom side of the stiffener electrically connected to the inter-package contact pads of the first semiconductor package by a solder having a melt temperature wherein said stiffener has an adhesive on the bottom side of the stiffener which attaches said stiffener to the top side of the first semiconductor package, said adhesive having a glass transition temperature between 90°
C.-180°
C. and a cure temperature below said melt temperature;
wherein said planar stiffener has a substrate comprising a polymeric core and an insulative plug material.
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Accused Products
Abstract
Embodiments of the invention relate to a package-on-package (PoP) assembly comprising a top device package and a bottom device package interconnected by way of an electrically interconnected planar stiffener. Embodiments of the invention include a first semiconductor package having a plurality of inter-package contact pads and a plurality of second level interconnect (SLI) pads; a second semiconductor package having a plurality of SLI pads on the bottom side of the package; and a planar stiffener having a first plurality of planar contact pads on the top side of the stiffener electrically connected to the SLI pads of the second package, and a second plurality of planar contact pads electrically connected to the inter-package contact pads of the first package.
42 Citations
18 Claims
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1. A semiconductor assembly, comprising:
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a first semiconductor package having a plurality of inter-package contact pads on a top side and a plurality of second level interconnect (SLI) pads on a bottom side; and a planar stiffener having a first plurality of planar contact pads on a top side of the stiffener electrically connected to a second semiconductor package, and a second plurality of planar contact pads on a bottom side of the stiffener electrically connected to the inter-package contact pads of the first semiconductor package by a solder having a melt temperature wherein said stiffener has an adhesive on the bottom side of the stiffener which attaches said stiffener to the top side of the first semiconductor package, said adhesive having a glass transition temperature between 90°
C.-180°
C. and a cure temperature below said melt temperature;wherein said planar stiffener has a substrate comprising a polymeric core and an insulative plug material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A semiconductor assembly comprising:
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a first semiconductor package having a plurality of inter-package contact pads on a top side and a plurality of second level interconnect (SLI) pads on a bottom side; and a planar stiffener having a plurality of contact pads on a top side of the stiffener electrically connected to a second semiconductor package, and a second plurality of contact pads on a bottom side of the stiffener electrically connected to the inter-package contact pads on the first semiconductor package by a solder having a melt temperature and an adhesive on the bottom side of the stiffener which attaches the stiffener to the top side of the first semiconductor package, said adhesive having a glass transition temperature between 90°
C.-180°
C. and a cure temperature below said melt temperature. - View Dependent Claims (16, 17, 18)
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Specification