Heat dissipation apparatus

摘要

A heat dissipation apparatus including an insulation substrate, a heat sink, and a stress reduction member. The insulation substrate includes a first surface serving as a heated body receiving surface and a second surface opposite to the first surface. The heat sink is thermally coupled to the second surface of the insulation substrate. The heat sink, which includes an upper case and a lower case, serves as a liquid cooling device including a cooling passage. The stress reduction member is arranged between the insulation substrate and the upper case. The stress reduction member includes stress absorption hollows. The upper case includes a first portion that contacts the stress reduction member and a second portion defined by the remaining part of the upper case. The first portion has a thickness that is less than that of the second portion.