Patent ID: 7324343

Claim:
A thermally conductive holder for holding a heat-generating component, the thermally conductive holder comprising a material formed from a thermally conductive composition, the thermally conductive composition including: a silicone rubber; and a thermally conductive filler in a range of 40 to 70 percent by volume with respect to total volume of the silicone rubber and the thermally conductive filler, wherein from 35 to 100 percent by volume of the thermally conductive filler is composed of magnesium oxide of 5 μm or less in average particle size; wherein said material has a hardness in a range of 20 to 70 as measured by a Type A durometer, and has a rubber elasticity, thereby allowing elastic deformation thereof; wherein the holder further comprises: a proximal end, a distal end wall, a peripheral wall extending therebetween, and a receiving portion that is defined by the distal end wall and the peripheral wall and opens at the proximal end, wherein the receiving portion is a recess being able to receive at least a part of the heat-generating component and sized smaller than said at least a part of the heat-generating component in at least one dimension, and wherein elastic deformation of the peripheral wall allows the receiving portion to receive the heat-generating component within the recess, wherein the at least part of the heat-generating component is generally cylindrical in shape and the receiving portion is a generally cylindrical recess, and wherein the receiving portion is sized such that a ratio of an inside diameter of the receiving portion to an outside diameter of the at least part of the heat-generating component is in a range from 85 to 95 percent.