1. Surface Modification of Polytetrafluoroethylene Sheet by Atmospheric Pressure Plasma Treatment
- Author
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Kazuya Yamamura, Hitoshi Kanzaki, Masafumi Shibahara, and Masanori Akamatsu
- Subjects
Polytetrafluoroethylene ,Materials science ,General Engineering ,chemistry.chemical_element ,Atmospheric-pressure plasma ,Oxygen ,Copper ,Contact angle ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,chemistry ,Chemical engineering ,Surface modification ,Composite material ,Layer (electronics) - Abstract
Polytetrafluoroethylene (PTFE) sheet was treated in an atmospheric pressure plasma using a series of feed gases (Water, Methanol, Ethanol, and Acetone) and the resulting surface modifications were evaluated by water contact angle measurements and x-ray photoelectron spectroscopy (XPS). We found that all plasma treatments gave rise to the breakage of some C-F bond, resulting in defluorination and the formation of oxygen containing functional groups onto the PTFE surface. Electroless plating of copper (Cu) could be carried out effectively on the modified PTFE surface. The use of ethanol plasma caused unexpected improvement in the T-peel adhesion strength of the electrically deposited Cu layer on the treated PTFE substrate with approximately three-fold improvement over that for conventionally adopted sodium treatments.
- Published
- 2007
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