Patent ID: 7433187

Claim:
A heat spreader module comprising active hard brazing materials, each containing Ti, between a pedestal, a heat spreader member, an insulating board, and a metal plate, said pedestal, said heat spreader member, said insulating board, and said metal plate being pressed and heated, thereby joining said pedestal, said heat spreader member, said insulating board, and said metal plate together, said active hard brazing materials each being one of (i) Ag—Cu—In—Ti and (ii) a mixture of hard brazing material of Ag—Cu—In and Ti, each of said active hard brazing materials being supplied in an amount ranging from 4.85 to 19.4 mg/cm 2 , said active element of said active hard brazing materials being contained in an amount ranging from 426.8 to 1358 μg/cm 2 , said metal plate including a marginal edge of alloy extending inward from a distal side edge of said metal plate a distance no greater than 200 μm, said marginal edge of alloy being created by an amount of said active hard brazing materials squeezed out beyond said distal side edge of said metal plate, and said heat spreader member having a thermal conductivity of 150 W/mK or greater.