Patent ID: 7130191
Filing Date: 2006-10-31
Classification: H01L

Abstract:
1. A function module with built-in heat dissipation device, comprising: a first circuit board having a first surface, a first device, and a second device, wherein the first and second devices have different heights and are disposed on the first surface; a second circuit board having a second surface facing the first surface, a third device and a fourth device, wherein the third and the fourth devices have different heights and are disposed on the second surface; a first heat spreader having a first face and a third face, opposite to the first face, wherein the first face is a stepped face and contacts the first and second devices simultaneously, and the third face is a flat face; a second heat spreader having a second face and a fourth face, opposite to the second face, wherein the second face is a stepped face and contacts the third and fourth devices simultaneously, and the fourth face is a flat face; and a heat dissipation fin, disposed between the first circuit board and the second circuit board, abutting the third face of the first heat spreader and the fourth face of the second heat spreader layer respectively.