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Plasma Enhanced Chemical Vapor Deposition of Porous Organosilicate Glass ILD Films With k ≤ 2.4.

Published online by Cambridge University Press:  01 February 2011

Raymond N. Vrtis ,
Mark L. O'Neill ,
Jean L. Vincent ,
Aaron S. Lukas ,
Brian K. Peterson ,
Mark D. Bitner  and
Eugene J. Karwacki
Raymond N. Vrtis
Affiliation:
Air Products and Chemicals, Inc. Allentown PA
Mark L. O'Neill
Affiliation:
Air Products and Chemicals, Inc. Allentown PA
Jean L. Vincent
Affiliation:
Air Products and Chemicals, Inc. Allentown PA
Aaron S. Lukas
Affiliation:
Air Products and Chemicals, Inc. Allentown PA
Brian K. Peterson
Affiliation:
Air Products and Chemicals, Inc. Allentown PA
Mark D. Bitner
Affiliation:
Air Products and Chemicals, Inc. Allentown PA
Eugene J. Karwacki
Affiliation:
Air Products and Chemicals, Inc. Allentown PA
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Abstract

We report on our work to develop a process for depositing nanoporous organosilicate (OSG) films via plasma enhanced chemical vapor deposition (PECVD). This approach entails codepositing an OSG material with a plasma polymerizable hydrocarbon, followed by thermal annealing of the material to remove the porogen, leaving an OSG matrix with nano-sized voids. The dielectric constant of the final film is controlled by varying the ratio of porogen precursor to OSG precursor in the delivery gas. Because of the need to maintain the mechanical strength of the final material, diethoxymethylsilane (DEMS) is utilized as the OSG precursor. Utilizing this route we are able to deposit films with a dielectric constant of 2.55 to 2.20 and hardness of 0.7 to 0.3 GPa, respectively.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 766: Symposium E – Materials, Technology and Reliability for Advanced Interconnects and Low-k Dielectrics - 2003 , 2003 , E7.4
Copyright
Copyright © Materials Research Society 2003

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