Study on Replication of Micro Channel Structures onto Polytetrafluoroethylene (PTFE) Substrate Employing Two-Stage Hot Embossing

Abstract:

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Replication of micro structures on a polymer substrate employing two-stage hot embossing is described in this paper. Linear channels with rectangular cross section were fabricated on a master mold of a brass plate by means of a computer numerical control (CNC) machining center using a micro end mill. In the first embossing process, the master mold with concavity features was embossed on a polycarbonate (PC) plate in order to make a “polymer replication mold”. Polytetrafluoroethylene (PTFE) was chosen as a material of polymer substrate used in the second embossing process. The replicated structure on PTFE substrate was observed and each dimension of its cross-sectional shape was also measured in order to assess the replication accuracy. According to the results, it was found that the depth of a replicated channel was near 90 % of that on the master mold. But roundness at each corner could be also found due to the insufficiency of plastic flow. Furthermore the deformation of the structures on a replication mold of PC before and after 2nd hot embossing process was also examined. As a result, it was found that the deformation ratio at temperatures below 145 oC was roughly smaller than 10 %.

Info:

Periodical:

Advanced Materials Research (Volumes 76-78)

Edited by:

Han Huang, Liangchi Zhang, Jun Wang, Zhengyi Jiang, Libo Zhou, Xipeng Xu and Tsunemoto Kuriyagawa

Pages:

526-531

DOI:

10.4028/www.scientific.net/AMR.76-78.526

Citation:

S.-I. Hira et al., "Study on Replication of Micro Channel Structures onto Polytetrafluoroethylene (PTFE) Substrate Employing Two-Stage Hot Embossing ", Advanced Materials Research, Vols. 76-78, pp. 526-531, 2009

Online since:

June 2009

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$35.00

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