Patent ID: 8852378

Claim:
A method of forming a metal alloy with a first coefficient of thermal expansion that can be directly attached, joined or bonded to a semiconductor or ceramic material, the metal alloy's first coefficient of thermal expansion substantially matching a second coefficient of thermal expansion of the semiconductor or ceramic material prior to the metal alloy being directly attached, joined or bonded to the semiconductor or ceramic material, the method comprising the steps of: selecting a semiconductor or ceramic material, determining the second coefficient of thermal expansion of the selected semiconductor or ceramic material prior to the metal alloy being directly attached, joined or bonded to the semiconductor or ceramic material, forming the metal alloy using a composition of titanium and tungsten in which relative percentages of titanium and tungsten in the metal alloy are selected so that the first coefficient of thermal expansion of the metal alloy prior to being directly attached, joined or bonded the semiconductor or ceramic material substantially matches the second coefficient of thermal expansion of the selected semiconductor or ceramic material prior to the metal alloy being directly attached, joined or bonded to the semiconductor or ceramic material, and wherein the titanium and tungsten alloy being a binary metal compound only.