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Ultimate-low-k SiOCH film (k=3D1.3) with sufficient modulus (>5 GPa) and ultra-high thermal stability formed by low-temperature pulse-time-modulated neutral-beam-enhanced CVD

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9 Author(s)
Yasuhara, S. ; Inst. of Fluid Sci., Tohoku Univ., Sendai, Japan ; Sasaki, T. ; Shimayama, T. ; Tajima, K.
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We investigated a pulse-time-modulated neutral-beam-enhanced CVD at a low substrate temperature of -70°C with dimethoxy-tetramethyl-disiloxane to form low-k SiOCH film. This method provided an ultimate low-k SiOCH film with a k-value of 1.3, a sufficient modulus of more than 5 GPa, and ultra-high thermal stability (no desorption of CH3 and H2O by 400°C annealing). This result is explained by the extremely high polymerization due to a drastic increase in absorption probability of the precursor combined with the pulse-time-modulated neutral beam irradiation and low substrate temperature of -70°C.

Published in:

Interconnect Technology Conference (IITC), 2010 International

Date of Conference:

6-9 June 2010

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