In roll-to-roll continuous printing, given the limitations in the pattern engraving technique and the need for accurate contact angle control between the ink and substrate, printing fine lines in the 10-μm scale is a major hurdle that needs to be addressed to achieve mass production of printed electronic devices. To address this issue, we propose a novel printing method based on gradation engraving; this method allows for both greater control over the width decrement of printed patterns as well as narrower fine lines than those achieved using an engraved pattern in the printing roll. Our experimental results show that, using the proposed method, printed line widths could be decreased according to the curvature of the sidewall of the engraved cell, even in the same aspect ratio. Furthermore, the width of the printed pattern was decreased by up to 62%, as compared to that achieved via the engraved cell, and a fine printed line narrower than 10-μm could be achieved. The proposed method represents a suitable alternative for the fabrication of 10-μm, or even thinner, fine conductive lines via the roll-to-roll continuous printing process.

在卷对卷连续打印中，考虑到图案雕刻技术的局限性以及对油墨和基材之间精确接触角控制的需求，需要解决10微米规模的细线问题实现印刷电子设备的批量生产。为了解决这个问题，我们提出了一种基于灰度雕刻的新颖印刷方法。与在印刷辊中使用雕刻图案相比，该方法既可以更好地控制印刷图案的宽度减小，又可以实现较窄的细线。我们的实验结果表明，即使在相同的纵横比下，使用所提出的方法，也可以根据雕刻单元侧壁的曲率来减小印刷线宽。此外，与通过雕刻单元实现的印刷图案宽度相比，印刷图案的宽度最多减少了62％，并且可以实现窄于10μm的精细印刷线。所提出的方法代表了通过卷对卷连续印刷工艺制造10μm甚至更细的细导线的合适替代方法。