06531226 is referenced by 10 patents and cites 3 patents.

A multilayer brazeable metallization structure for diamond components is described. The brazeable metallization finds particular application for the attachment of diamond components such as heat spreaders in electronic packages that incorporate high power semiconductor devices. In the present invention, a diamond component is provided with a multilayer coating of metals including a first layer of chromium for adhesion, a second barrier layer of a refractory metal for a barrier that may be alloyed with chromium, and a top layer of copper, silver or gold for wetting. The refractory metals for the second layer include tungsten, molybdenum, tantalum and niobium. Tungsten or tungsten-chromium alloy is preferred as the second layer. This multilayer metallization structure provides a robust interface between diamond and standard brazing alloys which are used to join the diamond to electrical leads or a flange made of metals such as copper-tungsten. The interfacial adhesion between the metallization and the diamond is sufficient to withstand exposure to brazing at temperatures less than or equal to 1100° C. in inert gas atmospheres that may contain hydrogen.

Title
Brazeable metallizations for diamond components
Application Number
9/584762
Publication Number
6531226 (B1)
Application Date
May 30, 2000
Publication Date
March 11, 2003
Inventor
Ronald R Petkie
Macungie
PA, US
Agent
Kilpatrick Stockton
US
Agent
Kristin D Mallatt
US
Bruce D Gray
US
Assignee
Morgan Chemical Products
NJ, US
IPC
B32B 9/00
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