HEAT DISSIPATING STRUCTURE OF ELECTRONIC APPARATUS
First Claim
1. A heat dissipation structure of an electronic device, comprising:
- a substrate having an IC chip, which is an electronic component that becomes a heat generating element, mounted thereon;
a cover member that covers a mounting surface of the substrate and that has a heat dissipation characteristic; and
a heat dissipation sheet interposed and pressed between the IC chip and the cover member, the heat dissipation structure dissipating heat through the heat dissipation sheet and the cover member,wherein the heat dissipation sheet has a double-layered structure in which a first dissipation sheet and a second heat dissipation sheet are laminated in a thickness direction, andwherein a rubber hardness of the first heat dissipation sheet differs from that of the second heat dissipation sheet so that a softer heat dissipation sheet and a harder heat dissipation sheet are laminated in a direction of a gap between the IC chip and the cover member.
1 Assignment
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Accused Products
Abstract
Disclosed is a heat dissipation structure of an electronic device that has an IC chip that is a heat generating element mounted on a substrate and a heat dissipation sheet disposed between the IC chip and a cover member so as to dissipate heat. In such a heat dissipation structure, even if variation in a gap between the IC chip and the cover member is generated, the heat dissipation sheet can come in contact with the IC chip and with the cover member with appropriate pressure. This way, heat is sufficiently dissipated, and therefore, reliability of the electronic device can be improved. A heat dissipation sheet (1) has a double-layered structure in which a first heat dissipation sheet (11) and a second heat dissipation sheet (12) are laminated in a thickness direction. A rubber hardness of the first heat dissipation sheet is set different from that of the second heat dissipating sheet, and a softer heat dissipation sheet and a harder heat dissipation sheet are laminated in a direction of the gap between an IC chip (3) and a cover member (4).
7 Citations
14 Claims
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1. A heat dissipation structure of an electronic device, comprising:
- a substrate having an IC chip, which is an electronic component that becomes a heat generating element, mounted thereon;
a cover member that covers a mounting surface of the substrate and that has a heat dissipation characteristic; and
a heat dissipation sheet interposed and pressed between the IC chip and the cover member, the heat dissipation structure dissipating heat through the heat dissipation sheet and the cover member,wherein the heat dissipation sheet has a double-layered structure in which a first dissipation sheet and a second heat dissipation sheet are laminated in a thickness direction, and wherein a rubber hardness of the first heat dissipation sheet differs from that of the second heat dissipation sheet so that a softer heat dissipation sheet and a harder heat dissipation sheet are laminated in a direction of a gap between the IC chip and the cover member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a substrate having an IC chip, which is an electronic component that becomes a heat generating element, mounted thereon;
Specification