Use of optoelectronic tweezers in manufacturing-accurate solder bead positioning
Use of optoelectronic tweezers in manufacturing-accurate solder bead positioning
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DOI：
10.1063/1.4971348
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发表时间：
2016-11-28
影响因子：
4
通讯作者：
Neale, Steven L.
中科院分区：
文献类型：
--
作者：
Zhang, Shuailong;Liu, Yongpeng;Neale, Steven L.
在这项工作中，我们分析了使用光电镊子（OSTO）操作45 μ m直径的Sn 62 Pb 36 Ag 2焊料珠与光诱导介电泳力，我们表现出很高的定位精度。结果发现，焊料珠的位置偏差随着陷阱尺寸的增加而增加。为了阐明潜在的机制，基于麦克斯韦应力张量的积分的模拟被用来研究具有不同尺寸的OET陷阱的力分布。据发现，焊料珠感觉到0.1 nN的静摩擦力或静摩擦力，由于电力拉他们向表面，这个力是不依赖于陷阱的大小。的静摩擦力限制了定位精度，但是，我们表明，通过选择一个陷阱，只是大于焊料珠亚微米的位置精度可以实现。(C)2016年作者。所有文章内容，除非另有说明，是根据知识共享署名（CC BY）许可证（http：//creativecommons.org/licenses/by/4.0/）。
In this work, we analyze the use of optoelectronic tweezers (OETs) to manipulate 45 mu m diameter Sn62Pb36Ag2 solder beads with light-induced dielectrophoresis force and we demonstrate high positioning accuracy. It was found that the positional deviation of the solder beads increases with the increase of the trap size. To clarify the underlying mechanism, simulations based on the integration of the Maxwell stress tensor were used to study the force profiles of OET traps with different sizes. It was found that the solder beads felt a 0.1 nN static friction or stiction force due to electrical forces pulling them towards the surface and that this force is not dependent on the size of the trap. The stiction limits the positioning accuracy; however, we show that by choosing a trap that is just larger than the solder bead sub-micron positional accuracy can be achieved. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).