Heat sink
A heat sink, including a base section in contact with a heating unit, and a heat-dissipating section for dissipating heat received from the heating unit by the base section, in which the base section includes at least one metal layer, and the heat-dissipating section includes a laminate prepared by laminating a metal layer and a graphite layer through an adhesive layer formed by using a composition containing a polyvinyl acetal resin, or a heat sink for dissipating heat from a heating unit, in which the heat sink includes a laminate prepared by laminating a metal layer and a graphite layer through an adhesive layer formed by using a composition containing a polyvinyl acetal resin, and is arranged so as to cover the heating unit.
1. A heat sink, comprising a base section in contact with a heating unit, and a heat-dissipating section for dissipating heat received from a heating unit by the base section, wherein
the base section includes at least one metal layer, and
the heat-dissipating section includes a laminate prepared by laminating a metal layer and a graphite layer through an adhesive layer formed by using a composition containing a polyvinyl acetal resin.
2. The heat sink according to claim 1 , wherein the heat-dissipating section is bellows-like.
3. A heat sink for dissipating heat from a heating unit, wherein
the heat sink includes a laminate prepared by laminating a metal layer and a graphite layer through an adhesive layer formed by using a composition containing a polyvinyl acetal resin, and is arranged so as to cover the heating unit.
4. The heat sink according to claim 1 , wherein the polyvinyl acetal resin comprises the following constitutional units A, B and C:
wherein, in constitutional unit A, R is independently hydrogen or alkyl;
5. The heat sink according to claim 4 , wherein the polyvinyl acetal resin further comprises the following constitutional unit D:
wherein, in constitutional unit D, R 1 is independently hydrogen or alkyl having 1 to 5 carbons.
6. The heat sink according to claim 1 , wherein a thickness of the adhesive layer is 30 micrometers or less.
7. The heat sink according to claim 3 , wherein the polyvinyl acetal resin comprises the following constitutional units A, B and C:
wherein, in constitutional unit A, R is independently hydrogen or alkyl;
8. The heat sink according to claim 7 , wherein the polyvinyl acetal resin further comprises the following constitutional unit D:
wherein, in constitutional unit D, R 1 is independently hydrogen or alkyl having 1 to 5 carbons.
9. The heat sink according to claim 3 , wherein a thickness of the adhesive layer is 30 micrometers or less.