A soot bonding method has been developed that solves the economic and limited-diameter problems associated with the conventional dielectrically isolated substrate. In this method, the Si-B-O soot particles used as adhesive agents are generated by essentially the same flame-hydrolysis technology used for fabricating optical waveguides. This soot bonding method is effective even for joining a surface with deep V-grooves or trenches, as well as for rough poly-Si-deposited surfaces. The ability to bond substrates with any joining surface conditions is expected to lead to wide application of this process and to a reduction of the steps, resulting in cost reduction
Published in:
Power Semiconductor Devices and ICs, 1991. ISPSD '91., Proceedings of the 3rd International Symposium on
Date of Conference: 22-24 Apr 1991