Polymeric dielectric layers having low dielectric constants and improved adhesion to metal lines
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United States of America Patent
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Sep 19, 2000
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app pub date -
Jun 19, 1997
filing date -
Jun 19, 1997
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Abstract
A thermally stable inter-metal dielectric for interlayer dielectric material has enhanced adhesiveness by introduction of an adhesive material. The adhesive material may reside only at the interface of the inter-metal dielectric or interlayer dielectric with adjacent metalization and polysilicon layers. A disclosed thermally stable intermetal dielectric is a fluorinated polymer such as polyfluoropyreline. A disclosed adhesive material is a highly polar material such as a thiofluorocarbon. These materials may be deposited by chemical vapor deposition by first activating fluoropyreline monomer and di(thiodifluoromethane) in a heated activation chamber to convert them to a form suitably reactive to form a polymeric dielectric on a wafer surface.
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