Key sheet
First Claim
1. A key sheet, comprising:
- a key top; and
a base sheet formed of a heat diffusion sheet in which a graphite sheet is covered with a polymer protective layer, with the key top being arranged on the polymer protective layer.
1 Assignment
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Accused Products
Abstract
Disclosed is a key sheet efficiently diffusing local heat generated by a device mounted on a board. A base sheet of a key sheet is provided with a heat diffusion sheet. The heat diffusion sheet is provided with a graphite sheet and a resin film and, in some cases, a thin metal plate. The base sheet itself thus constitutes the heat diffusion sheet, so even if no member for heat diffusion is provided between a board and the key sheet, it is possible to diffuse local heat generated by a semiconductor device in the face direction of the base sheet. Thus, with the key sheet, it is possible to meet the requirement for heat diffusion to eliminate local heat storage in electronic apparatuses and to meet the requirement for a reduction in the thickness and further in weight of electronic apparatuses.
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Citations
28 Claims
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1. A key sheet, comprising:
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a key top; and
a base sheet formed of a heat diffusion sheet in which a graphite sheet is covered with a polymer protective layer, with the key top being arranged on the polymer protective layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification