NEUTRAL AND ION EMISSIONS ACCOMPANYING PULSED EXCIMER-LASER IRRADIATION OF POLYTETRAFLUOROETHYLENE

被引：41

作者：

DICKINSON, JT ^{[1
]}

SHIN, JJ ^{[1
]}

JIANG, W ^{[1
]}

NORTON, MG ^{[1
]}

机构：

[1] WASHINGTON STATE UNIV,DEPT MECH & MAT ENGN,PULLMAN,WA 99164

来源：

JOURNAL OF APPLIED PHYSICS | 1993年 / 74卷 / 07期

关键词：

D O I：

10.1063/1.354341

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The neutral and charged species emitted by pulsed-laser irradiation of polytetrafluoroethylene (PTFE) at 248 nm in vacuum have been examined. In particular, the species and properties of the emission products produced at typical fluence regimes used in the pulsed-laser deposition of PTFE thin films have been characterized. The relative intensities of the major products as well as their dependence on laser fluence are presented, and a simple model is used to fit the observed fluence dependence. Evidence that the major neutral component, the monomer (C2F4), is formed from a thermally activated unzipping reaction is presented. The ionic species are derived from the neutral decomposition products, apparently ionized by electron collisions in the weak plasma generated at the target surface.

引用

页码：4729 / 4736

页数：8

共 28 条

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