Use of an Elastomeric Donor for LIFT of Metal Foils
Use of an Elastomeric Donor for LIFT of Metal Foils
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使用弹性体供体提升金属箔
DOI：
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发表时间：
2018
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影响因子：
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通讯作者：
A. Piqué
中科院分区：
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作者：
K. Charipar;R. Auyeung;Heungsoo Kim;N. Charipar;A. Piqué
随着增材制造扩展到功能结构的制造，激光诱导正向转移 (LIFT) 技术在传感器和电子应用打印材料中的使用越来越多。在许多 LIFT 应用中，尽管牺牲层或施主层在激光脉冲照射时完全汽化后必须进行补充，但仍然需要牺牲层或施主层。更好的解决方案是采用可重复使用的供体层，可转印油墨或金属箔附着在该供体层上，然后通过激光脉冲释放，但供体不会受到损坏，因此允许在后续转印中重复使用。在这项工作中，我们描述了使用基于聚（二甲基硅氧烷）或 PDMS 的弹性体供体层通过 UV（λ = 355 nm）激光脉冲进行 LIFT。将不同尺寸和厚度的金属箔附着到 PDMS 脱模层上，最初将其旋涂到玻璃基板上，然后通过 LIFT 印刷到硅基板上。进行了涉及激光脉冲强度以及供体基板和接收基板之间的间隙的参数研究，以确定作为激光能量密度和间隙距离的函数的放置精度。讨论了注量和间隙这两个参数对 25 和 50 μm 厚铜箔转印的影响，以及该技术在金属和其他材料的更复杂箔形状印刷中的应用。
The use of laser induced forward transfer (LIFT) techniques for printing materials for sensor and electronics applications is growing as additive manufacturing expands into the fabrication of functional structures. In many LIFT applications, a sacrificial or donor layer is required despite the fact that it must be replenished after being completely vaporized when illuminated with a laser pulse. A better solution would be to employ a reusable donor layer to which the transferable ink or metal foil is attached and then released by a laser pulse but without the donor undergoing damage, therefore allowing repeated use for subsequent transfers. In this work, we describe the use of an elastomeric donor layer based on poly(dimethylsiloxane) or PDMS for LIFT with UV (λ = 355 nm) laser pulses. Metal foils of varying size and thickness were attached to PDMS release layers initially spin-coated onto glass substrates and then printed onto silicon substrates by LIFT. A parametric study involving both the laser pulse intensity and the gap between the donor substrate and receiving substrate was conducted to determine placement accuracy as a function of laser fluence and gap distance. The effect of these two parameters, fluence and gap is discussed for the transfers of 25 and 50 μm thick copper foils, together with the applications of this technique for the printing of more complex foil shapes of metals and other materials.