Patent ID: 7341761
Filing Date: 2008-03-11
Classification: C23C

Abstract:
1. A method of preparing a carbon doped silicon oxide (CDO) film on a substrate, the method comprising: (a) providing the substrate to a deposition chamber; and (b) contacting the substrate with a primary CDO precursor and a secondary CDO precursor, wherein the primary CDO precursor is an alkylsiloxane and wherein the secondary precursor contains a carbon—carbon triple bond, under process conditions whereby the CDO film is formed on the substrate, and whereby the CDO film contains carbon—carbon triple bonds and the CDO film has a dielectric constant of less than 2.7, wherein the secondary CDO precursor comprises one or more compounds selected from the list consisting of Ethynyltrimethylsilane (ETMS), Propargyltrimethylsilane (PTMS), Propargyloxytrimethylsilane (POTMS), Bis(trimethylsilyl)acetylene (BTMSA), 1,3-Diethynyltetramethyldisiloxane (DTDS), Dimethylmethoxysilaneacetylene (DMMOSA), Methyldimethoxysilaneacetylene (MDMOSA), Dimethylethoxysilaneacetylene (DMEOSA), Methyldiethoxysilaneacetylene (MDEOSA), Ethyldiethoxysilaneacetylene (EDEOSA), and Dimethylsilane-diacetylene (DMSDA).