Patent ID: 7661463

Claim:
A cooling device comprising: a boiling chamber containing working fluid therein, the chamber comprising a bottom wall for contacting with a heat generating component and a cover hermetically connected with the bottom wall, the cover including a top wall and at least one bulge, the at least one bulge being extended upwardly above the top wall; a hollow buffering region defined in the at least one bulge of the cover, the at least one bulge having a top end and a bottom end, the top end being hermetically sealed, the bottom end being open and in fluid communication with the working fluid of the boiling chamber for receiving vapor generated by the working fluid when the working fluid is heated by the heat generating component and boils; and a heat sink arranged on and contacted with the top wall of the cover for dissipating heat transferred from the boiling chamber to environment; wherein the heat sink comprises a plurality of spaced fins extending upwardly from the top wall of the cover; and wherein at least one heat pipe connects an upper portion of at least one of the spaced fins with the buffering region, and a free end of the at least one heat pipe extends into the buffering region.