Research of micropattern fabrication using functional material on a small area surrounding of which have highly uneven structures

本研究提出了一种新颖的泵送机制，利用油墨中瞬时磁场梯度产生的磁应力，在其周围的小区域上实现功能材料的微图案，其高可达几毫米的不均匀微结构。评价了功能墨滴在长距离飞行中具有高泵送功率和落地精度的能力。结构设计是该泵送机构的关键，明确了喷嘴尺寸与油墨通道宽度、与油墨槽入口夹角（75~80）之间存在最佳比例关系，并在喷嘴边界布置非磁性厚层（厚度约为喷嘴尺寸的一半）将最有效地实现这一目标。通过对包括加热机械在内的制造工艺开发衍生出的新知识，为实际实现提供指导。

In this research, a novel pumping mechanism, utilizing magnetic stress that generated by instantaneous magnetic filed gradient in ink, was proposed for the purpose to realize micro-patterns with functional materials on a small area surrounding of which is as high as several millimeters of uneven micro-structures. The capability of high pumping power and landing accuracy for the long flying distance of functional ink drop was evaluated. Structural design is the key for this pumping mechanism, and it was clear that there exist an optimum proportional relationship between the size of nozzle and ink channel span, and the angle to the channel entrance (75~80) in ink-tank, and arrangement of a non-magnetic thick layer in nozzle frontier (thickness: about half of the nozzle size) will be most effective to achieve the goal. Through fabrication process development including the heating mechanical derived new knowledge for the guidance of practical realization.