Experimental and numerical investigation of nanoparticle removal using acoustic streaming and the effect of time

Title:
Experimental and numerical investigation of nanoparticle removal using acoustic streaming and the effect of time
Creator:
Bakhtari, Kaveh (Author)
Guldiken, Rasim O. (Author)
Makaram, Prashanth (Author)
Busnaina, Ahmed A. (Author)
Park, Jin-Goo (Author)
Language:
English
Publisher:
The Electrochemical Society
Copyright date:
20062006
Type of resource:
Text
Genre:
Articles
Format:
electronic
Digital origin:
born digital
Abstract/Description:
Theremoval of nanoparticles is becoming increasingly challenging as the minimumlinewidth continues to decrease in semiconductor manufacturing. In this paper,the removal of nanoparticles from flat substrates using acoustic streamingis investigated. Bare silicon wafers and masks with a 4 nmsilicon cap layer are cleaned. The silicon-cap films are usedin extreme ultraviolet masks to protect Mo-Si reflective multilayers. Theremoval of 63 nm polystyrene latex (PSL) particles from these substratesis conducted using single-wafer megasonic cleaning. The results show higherthan 99% removal of PSL nanoparticles. The results also showthat dilute SC1 provides faster removal of particles, which isalso verified by the analytical analysis. Particle removal from the4 nm Si-cap substrate is slightly more difficult as compared tobare silicon wafers. The experimental results show that the removalof nanoparticles takes a relatively long removal time. Numerical simulationsshowed that the long time is due to particle oscillatorymotion and redeposition, and that this phenomenon is not observedin the removal of sub-μm or larger size particles.

Comments:
Originally published in Journal of the Electrochemical Society, v.153, no.9, pp. G846-G850 (2006). doi:10.1149/1.2217287
Subjects and keywords:
Nanoparticles
Acoustic streaming
Semiconductors
molybdenum
silicon
elemental semiconductors
polymers
nanoparticles
acoustic streaming
optical multilayers
ultrasonic cleaning
masks
ultraviolet lithography
Electronic Devices and Semiconductor Manufacturing
Nanoscience and Nanotechnology
Permanent Link:
http://hdl.handle.net/2047/d20000924

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