Resin sheet with pressure sensitive adhesive layer

In electronic devices such as thin televisions, personal computers, mobile phones, or portable game consoles, the heat generated by heating components such as electronic components increases and has to be removed as the output of LEDs as light sources increase or cpus become highly integrated.

To this end, for example, the following methods have been used. The thermal conductor is arranged in the space between the heating part and the housing so that the heating part and the housing are integrated with each other. The heat generated by the heating part is transmitted to the housing using a hot conductor, and from the housing to the outside, thus cooling the heating part. Inorganic material sheets with high thermal conductivity, such as graphite sheets, have been frequently used as thermal conductors.

However, when using inorganic material sheets with high thermal conductivity, such as graphite sheets, the temperature of one part of the shell often becomes very high. In fact, when a person touches the shell with his or her hand, the temperature often reaches a level that makes the person uncomfortable. For example, temperature makes people feel at risk of burning. In particular, such high temperatures impede the operation of electronic devices that are individually portable, such as mobile phones.

Usually, the heating parts and the housing have their own concave and convex parts. In this case, the space between the heating parts and the housing has a complex shape due to their convex and convex parts. For example, the space has large parts and small parts. In this case, when the heat conductor is arranged in accordance with a small part of the space, a gap appears in the thick part of the space, making it difficult to conduct heat in that part. In contrast, when the heat conductor is arranged in accordance with the large part of the space, the housing and heating components cannot be integrated and fixed with each other in the thin part of the space.

In this case, large forces are required to store sheets of inorganic materials with high thermal conductivity, such as graphite sheets, in thin sections of the space. When a large force is applied, the shell, which often includes plastics, etc., cannot withstand the stress caused by the force and will crack or crack.

For such reasons as mentioned above, as in the past, when inorganic material sheets with high thermal conductivity, such as graphite sheets, are used as thermal conductors, the heating parts, the heat conductors and the housing do not contact each other in an integrated manner, but the heating parts, the heat conductors and the housing partly contact each other and heat removal is carried out only in the contact parts. A condition in which the temperature of a part of the shell becomes very high. In addition, when the heating component, the heat conductor, and the shell are only partially in contact with each other, the high heat conduction characteristics of the heat conductor cannot be fully demonstrated.