Figure 1 | Concept and experimental results of TCGC-assisted self-aligned laser transfer printing. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 1 | Concept and experimental results of TCGC-assisted self-aligned laser transfer printing.

Caption

Figure 1 | Concept and experimental results of TCGC-assisted self-aligned laser transfer printing. a, Schematic illustration of the stamp with TCGC: (i) Schematic of the self-aligned mechanism of TCGC. (ii) Conversion of an asymmetric light intensity input to an even heat output by TCGC. (iii) Composition of TCGC: the upper layer is graphene with ordered atomic arrangement and high phonon transport efficiency; the lower layer is amorphous carbon with disordered atomic structure and low phonon transport efficiency. (iv) Schematic of thermal homogenization by light absorption and directional heat conduction through TCGC. b, Schematic illustration of the pick-up and printing process of SALT: (i) Heated stamp is in contact with the chip. (ii) The stamp picks up the chip from the donor substrate using negative pressure. (iii) IR laser irradiation enables chip transfer from the stamp. c, Schematic illustration of chip transfer errors caused by irradiation deviations in conventional laser transfer techniques. d, Adhesion strength test results at different temperature states. e, Comparison of chip transfer accuracy under IR laser offset irradiation, conventional approaches (without TCGC) and this work. f, SEM images of different patterned chips (triangles, circles and squares) transferred by SALT.

Credit

YongAn Huang et al.

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