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US 12,509,616 B2Granted
Adhesive sheet, semiconductor module, and method for producing adhesive sheet
AssigneeNitto Shinko Corporation
InventorsTakeshi Yamaguchi, Maki Nakao
Life of this patent
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Abstract
An adhesive sheet according to the present invention is an adhesive sheet including a different material sheet configured to be flush with the rest of the adhesive sheet.
Claims5
An adhesive sheet comprising a first adhesive surface and a second adhesive surface on the opposite side to the first adhesive surface, each serving as an adhesive surface to be adhered to an adherend, the adhesive sheet comprising:
- a sheet body that is composed of an adhesive resin composition, and
- a different material sheet that is composed of a material other than the adhesive resin composition, has a thickness smaller than that of the sheet body, and has an area smaller than that of the sheet body,
- the different material sheet being embedded in the sheet body to be exposed on the first adhesive surface,
- the first adhesive surface having a first area part composed of the adhesive resin composition and a second area part composed of the material other than the adhesive resin composition,
- the second area part being flush with the first area part,
- the different material sheet being an electrolytic copper foil having a matte surface and a shining surface,
- the second area part being formed by the shining surface of the electrolytic copper foil.
4 more elements
A method for producing an adhesive sheet, the method comprising:
- producing a sheet body of a first state that has a double layer structure having one surface composed of a copper foil and the other surface composed of an adhesive resin composition;
- producing a sheet body of a second state by removing a part of the copper foil from the sheet body of the first state to have the one surface of the sheet body of the second state to have the one surface that includes a first area part on which the adhesive resin composition is exposed and a second area part on which the copper foil remains;
- and
- hot-pressing the sheet body of the second state to produce an adhesive sheet having the second area part being flush with the first area part.
1 more element
Dependencies are inferred from the claim text.