Patent ID: 7002247

Claim:
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, one opening extends through the lower plate, and the back surface of the semiconductor device is hermetically bonded to the bottom surface of the lower plate so as to completely cover the opening in the lower plate, so that a vapor chamber is formed by the semiconductor device and the upper and lower plates.