Laser induced thermal imaging of vacuum-coated OLED materials

Aryltriazene photopolymer thin films as sacrificial release layers for laser-assisted forward transfer systems: study of photoablative decomposition and transfer behavior

“…The use of thin intermediate films of metals (e.g., Ag, Au, Ti) or metal oxides (e.g., TiO 2 ) has been reported as absorbing layers for UV laser-based forward transfer applications of biomolecules [18][19][20][21] and cells [12,22], in the literature referred to as absorbing film assisted (AFA) LIFT [23][24][25] and Biological Laser Printing (BioLP TM ) [12,26]. Various polymeric composite materials (usually a binder matrix doped with dispersed absorber dyes) have been applied as DRL systems mostly in conjunction with powerful IR lasers, e.g., for highresolution full-color printing [27][28][29] and the microdeposition of electronic materials [30][31][32][33][34]. However, such intermediate absorbing light-to-heat conversion layers could not completely reduce the intrinsically high thermal load on sensitive transfer materials during the thermo-propulsive transfer process [31][32][33][34].…”

Spectrally narrowed leaky waveguide edge emission and transient electrluminescent dynamics of OLEDs

“…Laser thermal transfer method 54 Roll-to-roll processing is a technology still in development. The patterning of the device is obtained through modification of the rolls used to deposit the ink.…”

Unconventional, Laser Based OLED Material Direct Patterning and Transfer Methods

“…This dynamic release layer is the crucial part of the LIFT process and can be (a) a part of material of interest, (b) specially designed light absorbing thin intermediate layers in LITI (laser induced thermal imaging) (Lamansky et al 2005, Blanchet et al 2003a, Suh et al 2003 and LIPS (laser 197 induced pattern-wise sublimation) process (Hirano et al 2007) or (c) a mixture of active or sensitive material in a UV absorbent matrix in MAPLE DW(matrix assisted pulsed laser evaporation direct writing) (Piqué et al 1999, Arnold et al 2007 process. LIFT and several variations have demonstrated deposition of metals, metal oxide films, inorganic dielectric films, ceramics, and polymer and biomaterials.…”

“…(Blanchet et al 2003b) LITI is an emerging technology for high-resolution patterning of materials, including but not exclusive to both solution-and vacuum-processable OLED material sets. (Lamansky et al 2005) Base steps in the LITI process include deposition of the material to be patterned (transfer material) onto a specially designed donor film, precise optical alignment of a large format laser imaging system to device substrate (receptor) fiducials, lamination of the donor onto the substrate, and patterning of the transfer material onto the substrate by selective exposure of the donor-transfer material-receptor stack to laser radiation. Conversion of laser radiation to heat is achieved in a light-to-heat conversion (LTHC) layer(s), which typically utilizes carbon black as a black body absorber.…”

“…Other factors determining the viability of the patterning method for active matrix organic light emitting diode (AMOLEDs) depend on the given material set. (Lamansky et al 2005) Solution processible direct write technologies such as inkjet printing and screen printing are subject to a number of limitations such as the need for solvent removal and contamination into the deposited material. Additionally, the minimum feature size is heavily influenced by the properties of the fluid used to deliver the material of interest and multilayer structure fabrication is difficult.…”