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Efficient pulsed laser removal of 0.2 &mgr;m sized particles from a solid surface

 

作者: W. Zapka,   W. Ziemlich,   A. C. Tam,  

 

期刊: Applied Physics Letters  (AIP Available online 1991)
卷期: Volume 58, issue 20  

页码: 2217-2219

 

ISSN:0003-6951

 

年代: 1991

 

DOI:10.1063/1.104931

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Laser cleaning with pulsed ultraviolet and infrared lasers is successfully employed to remove particulate contamination from silicon wafer surfaces and from delicate lithography membrane masks. Particulate material investigated include latex, alumina, silicon, and gold. Gold particles as small as 0.2 &mgr;m can be effectively removed. This new and highly efficient laser cleaning is achieved by choosing a pulsed laser with short pulse duration (without causing substrate damage), and a wavelength that is strongly absorbed by the surface; the removal efficiency is further enhanced by depositing a liquid film of thickness on the order of micron on the surface just before the pulsed laser irradiation.

 

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