Direct Laser Interference Patterning of Nickel Molds for Hot Embossing of Polymers
Direct Laser Interference Patterning of Nickel Molds for Hot Embossing of Polymers
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DOI：
10.1002/adem.201600068
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发表时间：
2016-07-01
影响因子：
3.6
通讯作者：
Lasagni, Andres F.
中科院分区：
文献类型：
--
作者：
Rank, Andreas;Kunze, Tim;Lasagni, Andres F.
在这项研究中，作者提出了一个单一的步骤的方法制造微米结构的金属热压模具使用直接激光干涉图案。具有1.8和2.5 μ m的空间周期的图案被构造在Ni模具上并用于压印PET箔。研究了激光参数对结构高度随空间周期变化的影响。观察到的结构高度的快速增加到一个特定的激光能量密度。热模拟表明，结构高度和熔融材料的量之间的线性相关性。考虑压印时间和温度的PET箔的热压被成功地执行。结果表明，压印温度和压印时间对压印结构高度没有显著影响。
In this study, the authors present a single-step approach for fabricating micrometer structures on metallic hot embossing molds using direct laser interference patterning. Patterns with spatial periods of 1.8 and 2.5 mu m are structured on a Ni-mold and used for embossing PET-foils. The influence of the laser parameters on the structure height as function of the spatial period is investigated. A rapid increase in structure height is observed up to a specific laser fluence. Thermal simulations show a linear correlation between the structure height and the amount of molten material. Hot embossing of PET-foils considering the imprint time and temperature is successfully performed. The results show that both the imprint temperature and time do not have any significant influence on the structure height of the imprints.