期刊
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
卷 19, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0960-1317/19/4/047002
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资金
- National Science Foundation [0238861]
- Army research Office [W911NF0410176]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0238861] Funding Source: National Science Foundation
PDMS films of 10 mu m thickness can be patterned within 30 min by combining dry etching to achieve substantially vertical sidewalls with wet etching to achieve high etch rates and to protect the underlying substrate from attack. Dry etching alone would have taken 5 h, and wet etching alone would produce severe undercutting. In addition, using either technique alone produces undesirable surface morphologies. The mask used during etching is critical to a successful patterning outcome. E-beam evaporated Al was found to work well, adhering strongly to oxygen-plasma-treated PDMS and holding up well during both dry and wet etching. To prevent wrinkling of the PDMS, a fast deposition rate should be used.
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