LAUSR

Abstract Laser induced forward transfer technology has been reported to print various patterns of 2D and 3D structures in microfabrication for its fascinating characteristics such as non-contact and simple fabrication process. However, the efficiency and throughput are the drawback especially for manufacture of periodical polymer micro-stripes. Here, we proposed a laser interference induced forward transfer (LIIFT) technique, which could produce periodical polymer micro-stripes with high efficiency. The experiment results showed that the good micro-stripe of the polyimide (PI) had been transferred from the PI film, in which the thickness of the PI film, the laser fluence and the pulse number were ~1.2 µm, 39 mJ·cm−2 and 50, respectively. In addition, the relationship of the micro-stripes was systematically analyzed with the laser fluence, the pulse number and the thickness of donor film, respectively. Furthermore, the Fourier transform infrared(FT-IR)spectra showed that these characteristic valleys of the micro-stripe were coincident with those of the PI film, indicating that the micro-stripes transferred were not changed for their composition during the laser processing. Finally, the transferring process was discussed to analyze the formation of the transferred micro-stripes.