Memory module assembly including heat sink attached to integrated circuits by adhesive and clips
First Claim
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1. A memory module assembly comprising:
- a memory module printed circuit board assembly (PCBA) including;
a substrate having opposing first and second surfaces, a plurality of wiring traces formed on the first and second surfaces, at least some of the wiring traces being connected to metal contact pads formed along a connector edge of the substrate, anda plurality of first integrated circuit (IC) devices mounted on the first surface of the substrate such that an upper surface of each of the plurality of first IC devices faces away from the substrate, anda plurality of second IC devices mounted on the second surface of the substrate such that an upper surface of each of the plurality of second IC devices faces away from the substrate;
a first heat-sink plate having a first outer surface and an opposing first underside surface;
a second heat-sink plate having a second outer surface and an opposing second underside surface;
a plurality of adhesive portions including a first adhesive portion sandwiched between the first underside surface of the first heat-sink plate and the upper surface of an associated IC device of said plurality of first IC devices, and a second adhesive portion sandwiched between the second underside surface of the second heat-sink plate and the upper surface of an associated IC device of said plurality of second IC devices; and
means for pressing the first and second heat-sink plates onto the first and second surfaces, respectively, such that the first and second heat-sink plates are rigidly secured to the substrate,wherein a first plurality of said first integrated circuit (IC) devices and a second plurality of said first IC devices are disposed on the first surface of the substrate such that upper surfaces of the first and second pluralities of first IC devices define a first plane that is parallel to the first surface of the substrate,wherein the memory module PCBA further comprises a third IC device disposed on the first surface between the first and second pluralities of first devices, the second IC device having an upper surface defining a second plane that is parallel to the first surface of the substrate, wherein the first plane is located between the second plane and the first surface of the substrate, andwherein the first heat-sink plate includes a first recessed region having a first upper surface region and an opposing first planar underside surface region, a second recessed region having a second upper surface region and an opposing second planar underside surface region, and a raised pocket structure defining a third upper surface region and an opposing third planar underside surface region, the pocket region being disposed between the first and second recessed regions.
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Abstract
A memory module assembly includes two-plate heat sink attached to one or more of the integrated circuits (e.g., memory devices) of a memory module PCBA by adhesive. The adhesive is either heat-activated or heat-cured. The adhesive is applied to either the memory devices or the heat-sink plates, and then compressed between the heat-sink plates and memory module using a fixture. The fixture is then passed through an oven to activate/cure the adhesive. The two heat sink plates are then secured by a clip to form a rigid frame.
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Citations
16 Claims
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1. A memory module assembly comprising:
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a memory module printed circuit board assembly (PCBA) including; a substrate having opposing first and second surfaces, a plurality of wiring traces formed on the first and second surfaces, at least some of the wiring traces being connected to metal contact pads formed along a connector edge of the substrate, and a plurality of first integrated circuit (IC) devices mounted on the first surface of the substrate such that an upper surface of each of the plurality of first IC devices faces away from the substrate, and a plurality of second IC devices mounted on the second surface of the substrate such that an upper surface of each of the plurality of second IC devices faces away from the substrate; a first heat-sink plate having a first outer surface and an opposing first underside surface; a second heat-sink plate having a second outer surface and an opposing second underside surface; a plurality of adhesive portions including a first adhesive portion sandwiched between the first underside surface of the first heat-sink plate and the upper surface of an associated IC device of said plurality of first IC devices, and a second adhesive portion sandwiched between the second underside surface of the second heat-sink plate and the upper surface of an associated IC device of said plurality of second IC devices; and means for pressing the first and second heat-sink plates onto the first and second surfaces, respectively, such that the first and second heat-sink plates are rigidly secured to the substrate, wherein a first plurality of said first integrated circuit (IC) devices and a second plurality of said first IC devices are disposed on the first surface of the substrate such that upper surfaces of the first and second pluralities of first IC devices define a first plane that is parallel to the first surface of the substrate, wherein the memory module PCBA further comprises a third IC device disposed on the first surface between the first and second pluralities of first devices, the second IC device having an upper surface defining a second plane that is parallel to the first surface of the substrate, wherein the first plane is located between the second plane and the first surface of the substrate, and wherein the first heat-sink plate includes a first recessed region having a first upper surface region and an opposing first planar underside surface region, a second recessed region having a second upper surface region and an opposing second planar underside surface region, and a raised pocket structure defining a third upper surface region and an opposing third planar underside surface region, the pocket region being disposed between the first and second recessed regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A memory module assembly comprising:
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a memory module printed circuit board assembly (PCBA) including; a substrate having opposing first and second surfaces, a plurality of first wiring traces formed on at least one of the first and second surfaces, each of the first wiring traces being connected to an associated metal contact pad formed along a connector edge of the substrate, the substrate also having opposing first and second side edges disposed at opposing ends of the connector edge, wherein each of said first and second side edges defines a notch; and a first plurality of first integrated circuit (IC) devices and a second plurality of said first IC devices disposed on the first surface of the substrate such that upper surfaces of the first and second pluralities of first IC devices define a first plane that is parallel to the first surface of the substrate, and a second IC device disposed on the first surface between the first and second pluralities of first devices, the second IC device having an upper surface defining a second plane that is parallel to the first surface of the substrate, wherein the first plane is located between the second plane and the first surface of the substrate; a first heat-sink plate including; a first recessed region having a first planar upper surface and an opposing first planar underside surface, the first recessed region having a first side wall structure contacting the first surface of the substrate adjacent to a first side edge, and a tab extending into the notch defined by the first side edge; a second recessed region having a second planar upper surface and an opposing second planar underside surface, the second recessed region having a first side wall structure contacting the first surface of the substrate adjacent to a second side edge, and a tab extending into the notch defined by the second side edge; a raised pocket region defining a third planar upper surface and an opposing third planar underside surface, the pocket region being disposed between the first and second recessed regions; and an adhesive portion disposed between at least one of the first and second planar underside surfaces of said first heat sink plate and the upper surface of at least one of said first and second pluralities of said first IC devices. - View Dependent Claims (15, 16)
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Specification