Abstract
Ultrasonic imprinting is a novel process in which micro-patterns can be replicated on thermoplastic polymer with short processing time and low energy consumption. Ultrasonic imprinting uses ultrasonic vibration energy to soften thermoplastic polymer, and to replicate micro-patterns on the softened polymer surface from a patterned horn or mold. In this study, a new patterning method based on ultrasonic imprinting is proposed to develop composite micro-patterns using a simply-patterned mold. The proposed patterning technology uses repetitive ultrasonic imprinting in which a patterned replica is imprinted repeatedly on a rotated position. To implement this process for the development of composite micro-patterns, two-step repetitive imprinting with 90° rotation was performed using a prism-patterned mold, from which pyramid patterns can be developed. This repetitive imprinting was then further applied to fabricate composite micro-patterns that contain prism and pyramid micropatterns on a single polymer film.
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Lee, HJ., Park, K. Development of composite micro-patterns on polymer film using repetitive ultrasonic imprinting. Int. J. of Precis. Eng. and Manuf.-Green Tech. 1, 341–345 (2014). https://doi.org/10.1007/s40684-014-0043-y
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DOI: https://doi.org/10.1007/s40684-014-0043-y