Patent ID: 6319740
Filing Date: 2001-11-20
Classification: H01L

Abstract:
A method of forming a multilayer coating on a semiconductor integrated circuit device comprising the steps of:preparing first particles of a first coating composition;applying the first particles to a flame stream which is at a temperature sufficient to place the first particles in a molten state;building a specific thickness first layer of said first coating composition by passing the flame stream across the integrated circuit in successive passes over the integrated circuit;preparing second particles of a second coating composition;applying the second particles to a flame stream which is at a temperature sufficient to place the second particles in a molten state;building a specific thickness of a said second coating composition on said first layer by passing the flame stream across the integrated circuit in successive passes over the integrated circuit; andselecting the size of said first and second particles so that the particles attain a molten state in the flame stream and produce an impact force less than a specific level when striking the circuit in a molten state.