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Low-stress transfer bonding using floatation
KTH, School of Electrical Engineering (EES), Microsystem Technology (Changed name 20121201).
KTH, School of Electrical Engineering (EES), Microsystem Technology (Changed name 20121201).ORCID iD: 0000-0002-0441-6893
KTH, School of Electrical Engineering (EES), Microsystem Technology (Changed name 20121201).
KTH, School of Electrical Engineering (EES), Microsystem Technology (Changed name 20121201).ORCID iD: 0000-0001-8248-6670
2012 (English)In: Journal of Micromechanics and Microengineering, ISSN 0960-1317, E-ISSN 1361-6439, Vol. 22, no 7, 075005-075011 p.Article in journal (Refereed) Published
Abstract [en]

A novel method for transferring thin, large-area polymer layers from a mould and its subsequent bonding to a destination substrate is presented here. Buoyancy is used for transfer via floatation to allow the release of internal stress in the polymer and to avoid induced strain. Additionally, floatation leads to wrinkle-free contact between the polymer layer and its destination substrate, an important feature for the transfer of large-area polymer sheets. Poly(vinyl alcohol) is used as a release film on the mould, from which the device polymer layer is released using ultrasonication. The polymer layer floats from the mould to a destination surface, to which it automatically aligns. Here, the method is demonstrated by the successful manufacturing of a 4 '' sized, triple microfluidic layer PDMS stack on a silicon wafer, containing a total of 48 large-area, fragile membranes, each with a thickness of 50 mu m.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2012. Vol. 22, no 7, 075005-075011 p.
Keyword [en]
poly(dimethylsiloxane), PDMS, transfer bonding, stress release, membrane, poly(vinyl alcohol), PVA, release layer, microfabrication, MEMS, soft lithography, microfluidics, lab-on-chip
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-95362DOI: 10.1088/0960-1317/22/7/075005ISI: 000305890600019Scopus ID: 2-s2.0-84863815943OAI: oai:DiVA.org:kth-95362DiVA: diva2:527947
Funder
EU, European Research Council
Note

QC 20120730

Available from: 2012-05-23 Created: 2012-05-23 Last updated: 2017-12-07Bibliographically approved
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Haraldsson, Tommyvan der Wijngaart, Wouter

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Karlsson, J. MikaelHaraldsson, TommyCarlborg, Carl Fredrikvan der Wijngaart, Wouter
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