Packaged die on PCB with heat sink encapsulant
First Claim
1. A semiconductor assembly comprising:
- a substrate having at least one contact pad thereon;
a semiconductor chip having a first surface and a second surface, said first surface and said second surface each having a periphery, at least a portion of said first surface attached to a portion of said substrate and having at least one connection to a portion of said substrate, said semiconductor chip having at least one bond pad on said second surface thereof;
a barrier material adhered to a portion of said periphery of said second surface of said semiconductor chip for substantially forming a wall, said barrier material for substantially contacting a portion of said substrate;
a recess formed by said wall about said periphery of said second surface of said semiconductor chip; and
a heat-dissipating material disposed within said recess.
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0 Petitions
Accused Products
Abstract
An apparatus and a method for providing a heat sink on an upper surface of a semiconductor chip by placing a heat-dissipating material thereon which forms a portion of a glob top. The apparatus comprises a semiconductor chip attached to and in electrical communication with a substrate. A barrier glob top material is applied to the edges of the semiconductor chip on the surface (“opposing surface”) opposite the surface attached to the substrate to form a wall around a periphery of the opposing surface of the semiconductor chip wherein the barrier glob top material also extends to contact and adhere to the substrate. The wall around the periphery of the opposing surface of the semiconductor chip forms a recess. A heat-dissipating glob top material is disposed within the recess to contact the opposing surface of the semiconductor chip.
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Citations
69 Claims
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1. A semiconductor assembly comprising:
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a substrate having at least one contact pad thereon;
a semiconductor chip having a first surface and a second surface, said first surface and said second surface each having a periphery, at least a portion of said first surface attached to a portion of said substrate and having at least one connection to a portion of said substrate, said semiconductor chip having at least one bond pad on said second surface thereof;
a barrier material adhered to a portion of said periphery of said second surface of said semiconductor chip for substantially forming a wall, said barrier material for substantially contacting a portion of said substrate;
a recess formed by said wall about said periphery of said second surface of said semiconductor chip; and
a heat-dissipating material disposed within said recess. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of making a semiconductor assembly comprising:
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providing a substrate having at least one contact pad;
providing a semiconductor chip having a first surface, a second surface, and at least one bond pad on said second surface thereof attaching at least a portion of said first surface of said semiconductor chip to at least a portion of said substrate;
forming an electrical connection between said semiconductor chip and said substrate;
forming a wall substantially around a periphery of said second surface of said semiconductor chip using a barrier material, said wall forming a recess;
extending said barrier material to contact said substrate; and
disposing a heat-dissipating material substantially within said recess. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A semiconductor assembly comprising:
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a substrate having at least one contact pad;
a semiconductor chip having a first surface, having a second surface, and having at least one bond pad on said second surface thereof, said first surface attached to at least a portion of said substrate and connected to a portion of said substrate forming a connection;
a barrier material adhered to a periphery of said second surface of said semiconductor chip substantially forming a wall, a portion of said wall extending beyond said semiconductor chip to form a recess located above said second surface of said semiconductor chip, said barrier material substantially extending to and contacting portions of said substrate; and
a heat-dissipating material disposed within said recess. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method for making an assembly comprising:
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providing a substrate having at least one contact pad thereon;
providing a semiconductor chip having a first surface, having a second surface, and having at least one bond pad thereon;
attaching at least a portion of said first surface of said semiconductor chip to at least a portion of said substrate;
disposing an underfill material substantially between said substrate and said semiconductor chip;
forming an electrical connection between said at least one bond pad of said semiconductor chip and said at least one contact pad of said substrate;
forming a wall substantially around a periphery of said second surface of said semiconductor chip using a barrier material, said wall and said second surface of said semiconductor chip defining a recess;
extending said barrier material to contact at least a portion of said substrate; and
disposing a heat-dissipating material substantially within said recess. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. An assembly comprising:
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a substrate having at least one contact pad thereon;
a semiconductor chip having a first surface, having a second surface, and having at least one bond pad thereon, a portion of said first surface attached to and electrically connected to said substrate forming an electrical connection;
an underfill material substantially filling a space between said substrate and said semiconductor chip;
a barrier material substantially adhered to a periphery of said second surface of said semiconductor chip substantially forming a wall, a portion of said wall extending beyond said semiconductor chip to form a recess located above said second surface of said semiconductor chip, said barrier material substantially extending to and contacting said substrate; and
a heat-dissipating material disposed within said recess. - View Dependent Claims (33, 34, 35, 36, 37, 38)
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39. An assembly comprising:
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a substrate having at least one contact pad thereon;
at least one semiconductor chip having a first surface, having a second surface, and having at least one bond pad thereon, said first surface attached to and electrically connected to said substrate forming an electrical connection;
a barrier material adhered to a periphery of said second surface of said semiconductor chip substantially forming a wall, said barrier material substantially extending to and contacting a portion of said substrate;
a recess defined by said wall about said periphery of said second surface of said semiconductor chip; and
a heat-dissipating material disposed within said recess. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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47. An assembly comprising:
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a substrate having at least two contact pads thereon;
at least two semiconductor chips, each semiconductor chip having a first surface, having a second surface, and having at least one bond pad on said first surface thereof, said first surface of each semiconductor chip attached to and electrically connected to said substrate forming an electrical connection;
a barrier material adhered to a periphery of said second surface of each semiconductor chip substantially forming a wall, said barrier material substantially extending to and contacting a portion of said substrate;
a recess defined by said wall; and
a heat-dissipating material disposed within said recess of said each semiconductor chip. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54)
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55. An assembly comprising:
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a substrate having a plurality of contact pads thereon;
a plurality of semiconductor chips, each semiconductor chip of said plurality having a first surface, having a second surface, and having at least one bond pad thereon, said first surface attached to and electrically connected to said substrate forming an electrical connection;
a barrier material adhered to a periphery of said second surface of said each semiconductor chip substantially forming a wall, said barrier material substantially extending to and contacting a portion of said substrate;
a recess defined by said wall; and
a heat-dissipating material disposed within said recess of said each semiconductor chip. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62)
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63. A method of making an assembly comprising:
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providing a substrate having a plurality of contact pads thereon;
providing a plurality of semiconductor chips, each semiconductor chip of said plurality having a first surface, having a second surface, and having at least one bond pad on said second surface thereof;
attaching a portion of said first surface of said each semiconductor chip to a portion of said substrate;
disposing an underfill material substantially between said substrate and said each semiconductor chip;
forming an electrical connection between said each semiconductor chip and said substrate;
forming a wall substantially around a periphery of said second surface of said each semiconductor chip using a barrier material, said wall and said second surface of said each semiconductor chip defining a recess;
extending said barrier material for contacting and adhering to said substrate; and
disposing a heat-dissipating material substantially within said recess. - View Dependent Claims (64, 65, 66, 67, 68, 69)
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Specification