Patent ID: 7180179
Filing Date: 2007-02-20
Classification: H01L

Abstract:
1. An integrated circuit device comprising: a semiconductor device having a front surface containing active devices and a back surface that does not contain active devices, the semiconductor device being made of a material having a coefficient of thermal expansion; an upper plate having a bottom surface with a plurality of grooves and a top surface, the upper plate being made of a material having high thermal conductivity; and a lower plate having a top surface with a plurality of grooves and a bottom surface, the lower plate being made of a material having a coefficient of thermal expansion that is substantially the same as the coefficient of thermal expansion of the material of which the semiconductor device is made, wherein the bottom surface of the upper plate is hermetically bonded to the top surface of the lower plate so that a vapor chamber is formed by the upper and lower plates, the grooves on the top surface of the lower plate comprise a plurality of first walls, the grooves on the bottom surface of the upper plate comprise a plurality of second walls that extend to within less than 250 microns from the first walls, at least one of the second walls of the upper plate is not aligned with any of the first walls of the lower plate, and the back surface of the semiconductor device is bonded to the bottom surface of the lower plate.