Abstract: A thermal conductor includes a plurality of thermal conducting portions; and joint portions made of a material having flexibility and configured to join the respective thermal conducting portions with each other, having voids where neither the thermal conducting portion nor the joint portion is present, and satisfying a condition of 0.5?[(S1?S0)/S0]×100?20 when an area of the thermal conductor in a planar view in a first direction is expressed by S0 [cm2] and an area of the thermal conductor in the planar view in the first direction in a pressed state that the thermal conductor is pressed by 0.2 MPa in the first direction is expressed by S1 [cm2]. Accordingly, the thermal conductor satisfies both ensuring adhesiveness to a member in contact with the thermal conductor in use and suppressing excessive deformation of the thermal conductor in a compressed state.

Abstract: A thermal conductor includes a plurality of thermal conducting portions; and joint portions made of a material having flexibility and configured to join the respective thermal conducting portions with each other, having voids where neither the thermal conducting portion nor the joint portion is present, and satisfying a condition of 0.5 ? [(S1 -S0)/ S0] x 100 ? 20 when an area of the thermal conductor in a planar view in a first direction is expressed by SO [cm2] and an area of the thermal conductor in the planar view in the first direction in a pressed state that the thermal conductor is pressed by 0.2 MPa in the first direction is expressed by S1 [cm2]. Accordingly, the thermal conductor satisfies both ensuring adhesiveness to a member in contact with the thermal conductor in use and suppressing excessive deformation of the thermal conductor in a compressed state.

Abstract: A heat conducting sheet has an overall sheet structure with a plurality of heat conducting regions. Each heat conducting region is continuous between the two primary surfaces of the heat conducting sheet, and connecting regions connect adjacent side-walls of the plurality of heat conducting regions stacked laterally between the primary surfaces. The heat conducting regions include vacancies. The connecting regions consist of material that includes flexible resin material and unfilled layers are formed in part of the connecting regions. Some of the resin material can ingress into part of heat conducting region vacancies. This structure can achieve a highly elastic and flexible heat conducting sheet due to vacancies in the heat conducting regions and unfilled layers in the connecting region.