Fabrication of multilayer metamaterials by femtosecond laser-induced forward-transfer technique

2D and 3D Interconnect Fabrication by Picosecond Laser Induced Forward Transfer

Introduction Interconnects are an important cost driver in advanced 3D chip packaging. This holds for Through Silicon Vias (TSV) for chip stacking, but also for other integrated Sitechnology. Especially in applications with a low number (<100 mm) of relatively large (10-20 μm diameter), high aspect ratio (1:5-1:20) interconnects, conventional wafer level plating processes are slow and become cu...

Laser-induced Forward Transfer of Ag Nanopaste

Over the past decade, there has been much development of non-lithographic methods(1-3) for printing metallic inks or other functional materials. Many of these processes such as inkjet(3) and laser-induced forward transfer (LIFT)(4) have become increasingly popular as interest in printable electronics and maskless patterning has grown. These additive manufacturing processes are inexpensive, envi...

Laser-Induced Forward Transfer of Pure Metals

Influence of optical standing waves on the femtosecond laser-induced forward transfer of transparent thin films.

The effects of the formation of an optical standing wave during femtosecond laser-induced forward transfer of transparent films is analyzed using a numerical interference model. The dependence of the intensity distribution on a number of easily controllable experimental parameters is investigated. Results of the model are compared to experimental studies of the transfer of gadolinium gallium ox...

LiCoO2 Texturing by Laser Induced Forward Transfer for Printed Microbatteries

Laser induced forward transfer (LIFT) is used to print Li-ion battery electrodes. We show a preferred orientation of LiCoO2 particles in the (003) direction relative to non-laser transferred materials. While the laser energy does not alter the degree of orientation, the number of passes and transfer distance both have a significant influence on the observed texturing. We use a geometric argumen...