Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/30823

TitleOptimized SU-8 processing for low-cost microstructures fabrication without cleanroom facilities
Author(s)Pinto, V. C.
Sousa, Paulo J.
Cardoso, Vanessa Fernandes
Minas, Graça
KeywordsSU-8
UV photolithography
Low-cost microfabrication
Without cleanroom facility
Microfluidic
MEMS
Issue dateSep-2014
PublisherMDPI
JournalMicromachines
CitationMicromachines 2014, 5, 738-755
Abstract(s)The study and optimization of epoxy-based negative photoresist (SU-8) microstructures through a low-cost process and without the need for cleanroom facility is presented in this paper. It is demonstrated that the Ultraviolet Rays (UV) exposure equipment, commonly used in the Printed Circuit Board (PCB) industry, can replace the more expensive and less available equipment, as the Mask Aligner that has been used in the last 15 years for SU-8 patterning. Moreover, high transparency masks, printed in a photomask, are used, instead of expensive chromium masks. The fabrication of well-defined SU-8 microstructures with aspect ratios more than 20 is successfully demonstrated with those facilities. The viability of using the gray-scale technology in the photomasks for the fabrication of 3D microstructures is also reported. Moreover, SU-8 microstructures for different applications are shown throughout the paper.
TypeArticle
URIhttp://hdl.handle.net/1822/30823
DOI10.3390/mi5030738
ISSN2072-666X
Publisher versionwww.mdpi.com/journal/micromachines
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CAlg - Artigos em revistas internacionais/Papers in international journals
DEI - Artigos em revistas internacionais

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