Optimization of SiCOH dielectrics for integration in a 90nm CMOS technology
ABSTRACT The research integration of SiCOH films in a reliable ULSI integrated circuit chip imposes many requirements on the properties of the dielectric material. This paper describes a selection and optimization process for choosing the best film to be integrated in Cu wiring levels of ULSI CMOS chips in the 90 nm technology node.
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ABSTRACT: Porous insulators are utilized in the wiring structure of microelectronic devices as a means of reducing, through low dielectric permittivity, power consumption and signal delay in integrated circuits. They are typically based on low density modifications of amorphous SiO2 known as SiCOH or carbon-doped oxides, in which free volume is created through the removal of labile organic phases. Porous dielectrics pose a number of technological challenges related to chemical and mechanical stability, particularly in regard to semiconductor processing methods. This review discusses porous dielectric film preparation techniques, key issues encountered, and mitigation strategies.Materials. 01/2010;