Patent ID: 6511759
Filing Date: 2003-01-28
Classification: B23K,C22C,H01L,H05B,Y10T

Abstract:
An apparatus for the precise thermal treatment of a material selected from the group consisting of sheets of glass, semiconductor substrates, chemical compounds and biological materials, comprising:a first outer plate, a first braze alloy layer, a core construction having a first face adjacent said first outer plate and a second face adjacent a second outer plate and including heating or cooling means substantially positioned within a central plane located between said first face and said second face, a second braze alloy layer and said second outer plate in overlying relationship, said first outer plate, first braze alloy layer, second braze alloy layer and second outer plate being of a size which is peripherally larger than said core construction; wherein said apparatus is formed by first edge welding said first outer plate and said second outer plate thereby forming a sealed pouch enclosing said core construction; subsequently attaching to one of said outer plates an evacuation tube in fluid communication with an interior area of said pouch; evacuating said interior area by fluidly coupling a source of vacuum to said evacuation tube; and furnace brazing said evacuated sealed pouch by heating to a temperature sufficient to liquify said brazing alloy within a controlled atmosphere furnace, wherein differential pressure creates a dynamic loading condition; whereby a bonded unitary multi-laminar element containing substantially no voids between said elements is formed.