Adhesive film, semiconductor apparatus using the same, and semiconductor package including the same

Patent metadata

Field	Value
Publication number	US-11355413-B2
Application number	US-201916540495-A
Country	US
Kind code	B2
Filing date	Aug 14, 2019
Priority date	Dec 28, 2018
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

An adhesive film includes a porous metal layer having a plurality of pores therein, a first adhesive layer on one side of the porous metal layer, an adhesive substance at least partially filling the pores of the porous metal layer, and a plurality of first thermal conductive members distributed in the first adhesive layer.

First claim

What is claimed is:

1. An adhesive film, comprising:
a porous metal layer consisting of a sponge made entirely of metal, the sponge including pores distributed as an open cell structure throughout an entire thickness of the sponge;
an adhesive substance filling the pores of the porous metal layer;
a first adhesive layer on one side of the porous metal layer, the first adhesive layer including a plurality of first thermal conductive members distributed in the first adhesive layer; and
a second adhesive layer on an other side of the porous metal layer, the other side being opposite to the first adhesive layer.

2. The adhesive film as claimed in claim 1 , wherein a porosity of the porous metal layer is about 30% to less than 100%.

3. The adhesive film as claimed in claim 1 , wherein:
at least one of the pores is open at a surface of the porous metal layer, and
the adhesive substance filling the at least one of the pores is exposed at the surface of the porous metal layer.

4. The adhesive film as claimed in claim 1 , wherein:
the adhesive substance and the first adhesive layer are in contact with each other at an interface between the porous metal layer and the first adhesive layer, and
the adhesive substance and the first adhesive layer are provided in the form of a single body including the same material.

5. The adhesive film as claimed in claim 1 , wherein a major axis of the pores has a length of about 5 μm to about 3000 μm.

6. The adhesive film as claimed in claim 1 , wherein the porous metal layer includes one or more of copper, nickel, iron, or silver.

7. The adhesive film as claimed in claim 1 , wherein the first thermal conductive members have one or more of a bead shape, a wire shape, or a rod shape.

8. The adhesive film as claimed in claim 1 , wherein the first thermal conductive members occupy a volume fraction of about 1% to about 50% of a total volume of the first adhesive layer.

9. The adhesive film as claimed in claim 1 , wherein the first thermal conductive members are distributed in the adhesive substance.

10. The adhesive film as claimed in claim 1 , wherein the first thermal conductive members include one or more of amorphous silicon oxide, crystalline silicon oxide, aluminum oxide, magnesium oxide, zinc oxide, silicon carbide, aluminum nitride, beryllium oxide, boron nitride, or diamond.

11. The adhesive film as claimed in clam 1 , wherein:
the second adhesive layer includes a plurality of second thermal conductive members distributed therein,
the first adhesive layer includes a different material from that of the adhesive substance, and
the second adhesive layer includes a different material from that of the adhesive substance.

12. The adhesive film as claimed in claim 11 , further comprising:
a first removable polyethylene terephthalate (PET) or paper layer covering the second adhesive layer; and
a second removable polyethylene terephthalate (PET) or paper layer covering the first adhesive layer.

13. A semiconductor apparatus, comprising:
a substrate;
an exothermic device on the substrate; and
the adhesive film as claimed in claim 1 between the substrate and the exothermic device.

14. The semiconductor apparatus as claimed in claim 13 , wherein one side of the exothermic device is in contact with the adhesive film, the one side of the exothermic device being an inactive surface of the exothermic device.

15. The semiconductor apparatus as claimed in claim 13 , wherein:
the porous metal layer is in contact with the substrate, and
the first adhesive layer is in contact with the exothermic device.

16. The semiconductor apparatus as claimed in claim 13 , further comprising a semiconductor device between the substrate and the exothermic device,
wherein the adhesive film is disposed between the exothermic device and the semiconductor device, and attaches the exothermic device to the semiconductor device.

17. The semiconductor apparatus as claimed in claim 13 , wherein the adhesive film further includes a second adhesive layer on an other side of the porous metal layer, the other side being opposite the first adhesive layer.

18. The semiconductor apparatus as claimed in claim 13 , wherein the adhesive film further includes a plurality of first thermal conductive members distributed in the first adhesive layer.

19. A semiconductor package, comprising:
a package substrate;
a semiconductor chip on the package substrate;
a heat radiator covering the semiconductor chip; and
the adhesive film as claimed in claim 1 between the semiconductor chip and the heat radiator.

20. The semiconductor package as claimed in claim 19 , wherein the adhesive film is in contact with the heat radiator and an inactive surface of the semiconductor chip.

21. The semiconductor package as claimed in claim 19 , wherein a space between the package substrate and the heat radiator is filled with a mold layer.

22. The semiconductor package as claimed in claim 19 , wherein the second adhesive layer is in contact with the heat radiator.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Joungphil
• Kang Myung-Sung
• Kim Yeongseok
• Seo Gwangsun
• Yoo Hyein
• Choi Yongwon

Classifications

• H10W90/736

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W90/732

  between stacked chips · CPC title

• H10W72/884

  Die-attach connectors and bond wires · CPC title

• H10W72/877

  Bump connectors and die-attach connectors · CPC title

• H10W72/357

  Multiple die-attach connectors having different materials · CPC title