Hot embossing of micrographic elements in polypropylene |
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Authors: | Patrick W Leech Robert A Lee Brett A Sexton Fiona Smith |
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Affiliation: | CSIRO Manufacturing and Materials Technology, Private Bag 33, Clayton South MDC, 3169 Vic., Australia |
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Abstract: | Micrographic features generated by electron beam lithography have been hot embossed in biaxially-oriented polypropylene (BOPP). Each micrographic element consisted of a sub-field of 30 × 30 μm with a specific configuration of symbols, lettering and graphics. The micrographic elements were integrated with arrays of diffractive gratings in the form of an optically variable device. A high quality embossing of various micrographic elements has been demonstrated in features with a linewidth dimension ?365 nm and depth ?255 nm. The replication of arrays of micrographic elements was achieved uniformly over an area of 20 × 20 mm in the BOPP film by embossing at a temperature of 130 °C. |
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Keywords: | Hot embossing Micrographic BOPP |
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