Patent ID: 9748161
Date: 2017-08-29
CPC Classifications: F28D,H01L

Claim:
1. A heat dissipation device comprising: a base, the base having a top surface and a bottom surface, wherein a recess is defined in the bottom surface; a fin assembly mounted on the top surface of the base; and a heat absorber arranged at the bottom surface of the base and embedded in the recess, a fixing plate being positioned on the bottom surface to cover the recess and define a sealed and airtight cavity between the fixing plate and the base, a top end of the heat absorber being received in the sealed and airtight cavity and a bottom end of the heat absorber extending through the fixing plate to expose out of the sealed and airtight cavity, a flexible sheet being totally received in the sealed and airtight cavity to buffer a stress generated by assembling the heat dissipation device with external elements; wherein the heat absorber comprises a main body and two flanges arranged at opposite sides of the main body, the flanges being received in the recess, a side surface of each flange away from the fin assembly being coplanar with the bottom surface of the base, the flanges directly resisting inner surface of the recess, the flanges, the flexible sheet and the fixing plate cooperatively positioning the heat absorber to the base.