Pulsed CO2laser etching of polyimide
作者:
J. H. Brannon,
J. R. Lankard,
期刊:
Applied Physics Letters
(AIP Available online 1986)
卷期:
Volume 48,
issue 18
页码: 1226-1228
ISSN:0003-6951
年代: 1986
DOI:10.1063/1.96989
出版商: AIP
数据来源: AIP
摘要:
Etching of thin polyimide films in air was investigated using a line tunable, pulsed CO2laser. The threshold fluence for etching at a wavelength of 944 cm−1(10.6 &mgr;m) exceeds that at 1087 cm−1(9.2 &mgr;m) by a factor of 4. This is consistent with the infrared absorption spectrum which shows polyimide to be significantly more absorbing at 1087 cm−1. As a result, etching at 1087 cm−1produces a cleaner, more precisely defined region. Analysis of the vapors generated during laser etching shows the simple gases CO2, H2O, and CO to be present.
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