Heat sink sheet and fabrication method therefor
AssigneeMochida Corporation
InventorsFumitaka Ebihara, Masao Tatsuzawa, Masahiko Takahashi
Life of this patent
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Abstract
There is provided a heat sink sheet which can secure a heat source and a heat sink such as an aluminum cooling fin to each other and is superior in heat sink performance. The heat sink sheet is achieved by adhering a pressure sensitive adhesive layer adhered to the whole or part of a surface of a silicone heat sink layer. It is desirable that the pressure sensitive adhesion layer be made of an acrylic-containing adhesive or an urethane-containing adhesive, and a heat sink filler is advantageously blended with the pressure sensitive adhesive layer.
Claims3
A method for fabricating a heat sink sheet, comprising:
- forming a pressure sensitive adhesive layer onto a surface treated with a releasing agent, the adhesive layer comprising a heat sink filler blended with an adhesive containing an acrylic or an urethane;
- applying a silicone adherent primer onto the adhesive layer;
- passing a liquid heat sink silicone between rolls to coat the primer-treated surface of the adhesive layer at a predetermined thickness;
- and
- applying heat to form a heat sink sheet by causing the silicone to adhere to the adhesive layer by bridge bonding.
A method for fabricating a heat sink sheet, comprising:
- forming first and second pressure sensitive adhesive layers onto a respective surface treated with a releasing agent, each adhesive layer comprising a heat sink filler blended with an adhesive containing an acrylic or an urethane;
- applying a silicone adherent primer onto each adhesive layer;
- disposing the primer-treated surfaces of the adhesive layers opposite each other to form a volume therebetween;
- disposing a liquid heat sink silicone in the volume between the adhesive layers to contact their primer-treated surfaces;
- passing the adhesive layers and the silicone between rolls to form the silicone at a predetermined thickness;
- and
- applying heat to form a heat sink sheet by causing the silicone to adhere to the adhesive layers by bridge bonding.
Dependencies are inferred from the claim text.