Patterning of metallic electrodes on flexible substrates for organic thin-film transistors using a laser thermal printing method

Kun Tso Chen, Yu Hsuan Lin, Jeng Rong Ho, Chih Kant Chen, Sung Ho Liu, Jin Long Liao, Hua Chi Cheng

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We report on a laser thermal printing method for transferring patterned metallic thin films on flexible plastic substrates using a pulsed CO2 laser. Aluminium and silver line patterns, with micrometre scale resolution on poly(ethylene terephthalate) substrates, are shown. The printed electrodes demonstrate good conductivity and fulfil the properties for bottom-contact organic thin-film transistors. In addition to providing the energy for transferring the film, the absorption of laser light results in a rise in the temperature of the film and the substrate. This also further anneals the film and softens the plastic substrate. Consequently, it is possible to obtain a film with better surface morphology and with its film thickness implanted in part into the plastic surface. This implantation reveals excellent characteristics in adhesion and flexure resistance. Being feasible to various substrates and executable at ambient temperatures renders this approach a potential alternative for patterning metallic electrodes.

Original languageEnglish
Article number285401
JournalJournal of Physics D: Applied Physics
Volume44
Issue number28
DOIs
StatePublished - 20 Jul 2011

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