Patent ID: 8736014
Filing Date: 2014-05-27
Classification: C23C,H01L

Abstract:
1. A method comprising: preparing a precursor solution, wherein the precursor solution comprises a main matrix including at least one monomer and at least one porogen; adding, during an aging process and after the precursor solution has been prepared, at least one additive including a bridging organic functional group to the precursor solution; forming an adhesion promoter layer over a substrate; after forming the adhesion promoter layer, depositing the precursor solution over the adhesion promoter layer, wherein the deposited precursor solution forms a precursor film; and curing the precursor film to form a porous low-k film with a composite bonding structure, wherein the at least one monomer is formed of a tetramethoxysilane (TMOS) monomer and at least one of a methyltrimethoxysilane (MTMS) and methyltriethoxysilane (MTES) monomer, and the at least one additive is selected from the group consisting of bis(triethoxysilyl)methane (BTSM), bis(triethoxysilyl)ethane (BTSE), and bis(triethoxysilyl)benzene (BTSB).