Laser-driven hierarchical "gas-needles" for programmable and high-precision proximity transfer printing of microchips.

ABSTRACT: Micro-transfer printing (μTP) techniques are essential for advanced electronics. However, current contact/noncontact μTP techniques fail to simultaneously achieve high selectivity and transfer accuracy. Here, a laser projection proximity transfer (LaserPPT) technique is presented, which assembles the microchips in an approach-and-release manner, combining high-precision parallelism with individual chip control. An embedded carbon layer with a thin gas layer is generated by an ultraviolet laser, followed by absorbing heat from the infrared laser, to enable the sequential expansion of hierarchical "gas-needles." The level 1 large gas-needle with a substantially growing height can reduce the gap between the microchip and the receiver. Then, the level 2 small gas-needles enable the gentle rele

SUBMITTER: Chen F 

PROVIDER: S-EPMC10610906 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature