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A study on the relationship between print-ability and flash light sinter-ability of Cu nano/micro-ink for printed electronics.
- Source :
-
Thin Solid Films . Feb2019, Vol. 671, p36-43. 8p. - Publication Year :
- 2019
-
Abstract
- Abstract In this study, the effect of rheological properties of Cu nano/micro (NP/MP)-inks with various amounts of dispersant on the print-ability and sinter-ability for flash light sintering was investigated. The rheological properties such as viscosity, viscoelasticity and thixotropic index of Cu NP/MP-inks were measured using a rheometer. The fabricated Cu NP/MP-inks were printed on polyimide substrate using a screen printing method. The 3D profile of printed Cu NP/MP-ink pattern was measured using surface profiler. In order to sinter the printed Cu NP/MP-inks, flash light sintering technique was employed. The flash light irradiation conditions (pulse power, pulse number, on-time, and off-time) were optimized to obtain the high sintering characteristic of Cu NP/MP-inks. In order to characterize the microstructures and transformation crystal phase of the sintered Cu NP/MP-inks, scanning electron microscopy, focused ion-beam and X-ray diffraction analysis were performed. From the results, the optimal sintered Cu NP/MP-ink film had a 6.16 μΩ·cm resistivity and 5B level of adhesion strength. Highlights • We investigated the effect of dispersant on print-ability and sinter-ability. • 2.6 wt% of dispersant enhanced the printing uniformity and aspect ratio. • Enhanced print-ability improved the flash light sinter-ability. • The sintered Cu film showed the low resistivity and high adhesion strength. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SINTERING
*COPPER alloys
*METAL nanoparticles
*RHEOLOGY
*POLYIMIDES
Subjects
Details
- Language :
- English
- ISSN :
- 00406090
- Volume :
- 671
- Database :
- Academic Search Index
- Journal :
- Thin Solid Films
- Publication Type :
- Academic Journal
- Accession number :
- 134184994
- Full Text :
- https://doi.org/10.1016/j.tsf.2018.12.021