EP4359165A1 - Laser-induzierter vorwärtstransfer (lift) mit angepasster dampfblase - Google Patents
Laser-induzierter vorwärtstransfer (lift) mit angepasster dampfblaseInfo
- Publication number
- EP4359165A1 EP4359165A1 EP22736228.2A EP22736228A EP4359165A1 EP 4359165 A1 EP4359165 A1 EP 4359165A1 EP 22736228 A EP22736228 A EP 22736228A EP 4359165 A1 EP4359165 A1 EP 4359165A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser beam
- carrier
- transfer
- pulsed
- focused laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
- C23C14/048—Coating on selected surface areas, e.g. using masks using irradiation by energy or particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/28—Vacuum evaporation by wave energy or particle radiation
Definitions
- LIFT Laser-induced forward transfer
- the present invention relates to a method for the laser-induced transfer of different materials, in which a pulsed, tunable laser beam source is used and the radiation energy is absorbed and a vapor bubble is formed directly in the transfer material.
- a pulsed, tunable laser beam source is used and the radiation energy is absorbed and a vapor bubble is formed directly in the transfer material.
- thin absorber layers are used to absorb the energy of a laser beam.
- DRL dynamic release layers
- the absorption of the radiation energy in the absorber layer between the carrier substrate and the transfer material results in focused local heating and the formation of a vapor bubble, which causes a jet of transfer material, resulting in a targeted transfer of transfer material and/or materials in the transfer material over a short distance between the transfer carrier and the transfer material Receiver carrier is enabled.
- the absorption of the radiant energy locally destroys or damages the thin absorber layer between the carrier substrate and the transfer material, so that a repeated transfer from the same position is no longer possible.
- particles released from the absorber layer can also be transferred and contaminate the printed material in the form of nanoparticles or larger fragments.
- the presence of an absorber layer also reduces control over the generated vapor bubble geometry, since penetration of the laser radiation into the transfer material itself is prevented and the laser beam profile used is only insufficiently reflected in the geometry of the vapor bubble.
- the absorber layer can be composed of different materials.
- metallic absorber layers such as titanium, gold and silver
- hot particles from the absorber layer can penetrate deep into the transfer material and create smaller additional vapor bubbles there, which have a negative effect on the transfer process.
- the hot particles can also damage thermally sensitive materials.
- hydrogels such as collagen and Matrigel
- UV lasers with wavelengths below 200 nm are usually used. Due to the short wavelength of UV light, damage to the DNA can occur during the transfer process of biological materials.
- the purity and integrity of the transferred material and precise control over the volumes of the transferred liquid droplets are particularly relevant.
- the applications range from printing imperfection-free optical elements to the transfer of individual living cells in the field of cell sorting and tissue printing (tissue engineering).
- the transfer of liquid quantities in the range from 10 fL to 7000 pL has been shown in the so-called laser-induced forward transfer (LIFT).
- LIFT laser-induced forward transfer
- different structures and layer thicknesses of the transfer material are required for different droplet sizes.
- a precise adjustment of the droplet size over a large range as well as the expansion of the previously established process to smaller and larger amounts of liquid is of increasing importance for current applications of the technology.
- the attempt to reduce the droplet volume is mainly driven by the increasing miniaturization of components.
- An example of this is the gluing of the smallest components with high precision, in which individual drops of glue are to be transferred automatically and without contact.
- New requirements for the maximum amount of liquid that can be transferred are made, for example, in Laser Assisted Bioprinting (LAB) for the construction of artificial tissues.
- LAB Laser Assisted Bioprinting
- the number of cells transferred per unit of time must be increased.
- Precisely adjustable droplet sizes enable precise positioning of the required cell types and cell counts, while liquid quantities of over 7000 pL enable rapid area filling.
- FF-LIFT film-free LIFT
- Patrascioiu et al. Laser-generated liquid microjets. Correlation between bubble dynamics and liquid ejection, Microfluid Nanofluid, 2014, 16 (1-2), pp. 55-63) a method in which the laser radiation from below through the basin of the transfer material just below the surface is focused.
- high fluences in the range of 10 12 W/cm 2 are required in order to convert sufficient energy of the laser radiation into the vapor bubble kinetics via non-linear absorption.
- the transfer material is exposed outside of the focus, which can lead to undesirable aging processes in the case of photo-sensitive transfer materials.
- Zhang et al. In the case of the in Zhang et al.
- BA-LIFT blister actuated LIFT process
- a polymer layer with a layer thickness of 1 to 10 ⁇ m is used instead of a metallic or organic absorber layer.
- the vapor bubble that triggers the transfer does not form in the transfer material itself, but rather between the carrier and the polymer layer, with the latter being irreversibly deformed into a blister.
- the momentum of the sudden expansion is passed on to the transfer material, where a jet is formed.
- the jet formation is analogous to the usual LIFT process using a metallic or organic absorber layer to absorb the radiant energy.
- the BA-LIFT process reduces or eliminates the risk of particle contamination from the absorber layer in the printed material, as the polymer layer separates the vapor bubble from the transfer material itself.
- this strict separation also has the disadvantage that the possibility of controlling the transfer jet is severely restricted by complex vapor bubble geometries.
- multiple printing at the same position is not possible due to the irreversible deformation of the polymer layer at the location of the laser focus. There is therefore a need for an improved method for laser-induced transfer of materials that allows contamination-free and precise transfer over a wide range of adjustable transfer volumes.
- the present invention solves the problem on which it is based by the subject matter of the independent claims.
- the present invention describes in particular a method in which a specific absorber layer can be dispensed with and the amount of material transferred from a transfer carrier to a receiver carrier can be set precisely and over a large range in a LIFT process.
- the invention relates in particular to a method for laser-induced transfer of material comprising the steps: a) providing a transfer carrier comprising a carrier substrate transparent to laser radiation and a carrier material comprising the material to be transferred and a pulsed, tunable laser beam source, b) adjusting the properties of at least one pulsed, focused laser beam, c) emitting the at least one pulsed, focused laser beam through the carrier substrate into the carrier material, the at least one pulsed, focused laser beam having the properties set in step b) and leading to the formation of at least one vapor bubble in the carrier material, and d) transmission of the material to be transferred from the transfer medium to a receiver medium.
- the method according to the invention is a LIFT method that is based on the use of a pulsed, tunable laser beam source and the setting of the properties of a pulsed focused laser beam used to transfer material from a transfer medium to a receiving medium, in particular its laser wavelength, Rayleigh length , Pulse length, pulse energy, focus position and/or laser beam profile, so that the targeted formation of a vapor bubble, in particular a vapor bubble with predetermined localization, dimensions and geometry, can be achieved directly in the carrier material, in particular in the volume of the carrier material, without a separate one Require absorber layer on the transfer carrier.
- the method according to the invention is more economical, in particular less labor-intensive and cheaper, than LIFT methods in which a transfer carrier coated with an absorber layer is used to absorb the radiation energy.
- the method also offers great flexibility in terms of setting the desired amount of material to be transferred.
- the method according to the invention allows material to be transferred to be transferred several times in succession from the same position on the transfer carrier to a receiving carrier. This flexibility enables the user to use the method according to the invention in numerous technical fields of application.
- the method can be used for bioprinting, such as cell sorting, organ printing and tissue engineering.
- the method according to the invention also allows miniaturization in the targeted transfer of material, as is required, for example, for the precise positioning of the smallest drops of adhesive or the printing of micro-optics.
- the transfer carrier has no absorber layer.
- the carrier material additionally has at least one substance suitable for absorbing the pulsed laser beam.
- the carrier material additionally has at least one substance suitable for absorbing the pulsed laser beam.
- no other substance suitable for absorbing the pulsed laser beam is particularly preferably used in the method according to the invention.
- the carrier substrate of the transfer carrier which is transparent to laser radiation, consists of glass, preferably of quartz.
- the carrier material of the transfer carrier particularly preferably has a layer thickness of 1 to 500 ⁇ m, preferably 5 to 400 ⁇ m, preferably 10 to 300 ⁇ m, preferably 20 to 200 ⁇ m, preferably 30 to 150 ⁇ m, preferably 50 to 100 ⁇ m.
- the carrier material of the transfer carrier preferably has a layer thickness of at most 500 ⁇ m, preferably at most 450 ⁇ m, preferably at most 400 ⁇ m, preferably at most 350 ⁇ m, preferably at most 300 ⁇ m, preferably at most 250 ⁇ m, preferably at most 200 ⁇ m, preferably at most 150 ⁇ m, preferably at most 100 ⁇ m, preferably at most 75 ⁇ m, preferably at most 50 ⁇ m.
- the carrier material is a liquid or an aqueous gel.
- the water-containing gel particularly preferably comprises at least one substance selected from the group consisting of gelatin, agarose, chitosan, matrigel, collagen and methyl cellulose.
- the carrier material is a solid.
- the pulsed, tunable laser beam source is a laser selected from the group of optical parametric oscillators (OPO), in particular an OPO that emits in the infrared spectral range.
- OPO optical parametric oscillators
- the pulsed, tunable laser beam source is particularly preferably an OPO with an emission in the range from 2 to 5 ⁇ m, preferably 2.5 to 4.5 ⁇ m, preferably 2.6 to 4.2 ⁇ m, preferably 2.7 to 3.9 ⁇ m, preferably 2.8 to 3.4 ⁇ m, preferably 2.9 to 3.0 ⁇ m, particularly preferably 2.94 ⁇ m.
- the pulsed, tunable laser beam source is an OPO pumped by a laser source with 800 to 1400 nm, preferably 900 to 1200 nm, preferably 1000 to 1100 nm, particularly preferably 1064 nm.
- the pulsed, tunable laser beam source is preferably an OPO, which is generated by a laser source with a pulse duration of at least 0.1 ns, preferably at least 0.5 ns, preferably at least 1 ns, preferably at least 5 ns, preferably at least 10 ns. preferably at least 20 ns, preferably at least 30 ns, preferably at least 40 ns.
- the pulsed, tunable laser beam source is an OPO, which is emitted by a laser source with a pulse duration of at most 50 ns, preferably at most 45 ns, preferably at most 40 ns, preferably at most 35 ns, preferably at most 30 ns, preferably at most 25 ns, preferred at most 20 ns, preferably at most 15 ns, preferably at most 10 ns, preferably at most 5 ns, preferably at most 2 ns, preferably at most 1 ns.
- the pulsed, tunable laser beam source is particularly preferably an OPO, which is generated by a laser source with a pulse duration of 0.1 to 50 ns, preferably 0.5 to 40 ns, preferably 1 to 30 ns, preferably 5 to 20 ns. is pumped.
- the at least one pulsed, tunable laser beam source is a laser selected from the group of optical parametric oscillators (OPO) with an emission in the range from 2.7 to 3.9 ⁇ m, which is emitted by a laser source is pumped with a wavelength of 1000 to 1100 nm with a pulse duration of 0.1 to 50 ns.
- OPO optical parametric oscillators
- the properties of the at least one pulsed focused laser beam set in step b) are selected from the group consisting of laser wavelength, Rayleigh length, pulse length, pulse energy, focal position and laser beam profile.
- the properties of the at least one pulsed focused laser beam set in step b) are preferably at least two, preferably at least three, preferably at least four properties selected from the group consisting of laser wavelength, Rayleigh length, pulse length, pulse energy, focus position and laser beam profile.
- the properties of the at least one pulsed focused laser beam set in step b) include the wavelength.
- the wavelength set in step b) is preferably in the range from 2.5 to 3.5 ⁇ m, preferably from 2.75 to 3.25 ⁇ m.
- the wavelength set in step b) is particularly preferably at most 5 ⁇ m, preferably at most 4.5 ⁇ m, preferably at most 4 ⁇ m, preferably at most 3.5 ⁇ m, preferably at most 3.25 ⁇ m, preferably at most 3 ⁇ m.
- the wavelength set in step b) is at least 0.5 ⁇ m, preferably at least 1 ⁇ m, preferably at least 1.25 ⁇ m, preferably at least 1.5 ⁇ m, preferably at least 1.75 ⁇ m, preferably at least 2 ⁇ m, preferably at least 2.25 ⁇ m, preferably at least 2.5 ⁇ m.
- the properties of the at least one pulsed focused laser beam set in step b) include the Rayleigh length.
- the Rayleigh length set in step b) is particularly preferably in a range from 10 ⁇ m to 10 mm, preferably 100 ⁇ m to 10 mm, preferably 150 ⁇ m to 5 mm, preferably 200 ⁇ m to 1 mm, preferably 250 ⁇ m to 1 mm, preferably 500 ⁇ m to 1 mm.
- the Rayleigh length set in step b) is at least 10 ⁇ m, preferably at least 50 ⁇ m, preferably at least 100 ⁇ m, preferably at least 150 ⁇ m, preferably at least 200 ⁇ m, preferably at least 250 ⁇ m, preferably at least 500 ⁇ m. preferably at least 1 mm.
- the Rayleigh length set in step b) is at most 10 mm, preferably at most 8 mm, preferably at most 6 mm, preferably at most 4 mm, preferably at most 2 mm, preferably at most 1 mm, preferably at most 750 ⁇ m, preferably at most 500 ⁇ m, preferably at most 250 ⁇ m, preferably at most 200 ⁇ m, preferably at most 150 ⁇ m, preferably at most 100 ⁇ m, preferably at most 50 ⁇ m, preferably at most 25 ⁇ m.
- the properties of the at least one pulsed focused laser beam set in step b) include the pulse length.
- the pulse length set in step b) is preferably in the range from 1 fs to 500 ns, preferably 10 fs to 250 ns, preferably 50 fs to 100 ns, preferably 100 fs to 1 ns.
- the pulse length set in step b) is particularly preferably in the range from 0.01 to 10 ns, preferably 0.05 to 5 ns, preferably 0.1 to 1 ns.
- the pulse length set in step b) is at most 500 ns, preferably at most 250 ns, preferably at most 100 ns, preferably at most 50 ns, preferably at most 25 ns, preferably at most 10 ns, preferably at most 5 ns, preferably at most 2 .5 ns, preferably at most 1 ns.
- the pulse length set in step b) is at most 500 ps, preferably at most 250 ps, preferably at most 100 ps, preferably at most 50 ps, preferably at most 25 ps, preferably at most 10 ps, preferably at most 5 ps, preferably at most 2.5 ps, preferably at most 1 ps.
- the in is preferably Step b) set pulse length at most 500 fs, preferably at most 250 fs, preferably at most 100 fs, preferably at most 50 fs, preferably at most 25 fs, preferably at most 10 fs, preferably at most 5 fs.
- the properties of the at least one pulsed focused laser beam set in step b) include the pulse energy.
- the pulse energy set in step b) is 1 pj to 20 ⁇ J, preferably 1 pj to 15 ⁇ J, preferably 1 pj to 10 ⁇ J, preferably 1 pj to 5 ⁇ J, preferably 2 pj to 10 ⁇ J 2 ⁇ J to 5 ⁇ J, preferably 3 ⁇ J to 10 ⁇ J, preferably 3 ⁇ J to 5 ⁇ J, preferably 5 ⁇ J to 10 ⁇ J, preferably 6 ⁇ J to 10 ⁇ J, preferably 8 ⁇ J to 10 ⁇ J.
- the properties of the at least one pulsed focused laser beam set in step b) include the focal position.
- the focus of the pulsed focused laser beam set in step b) is preferably in the carrier material at a distance of at least 0.1 ⁇ m, preferably at least 0.25 ⁇ m, preferably at least 0.5 ⁇ m, preferably at least 1 ⁇ m, preferably at least 2 ⁇ m at least 3 ⁇ m, preferably at least 4 ⁇ m, preferably at least 5 ⁇ m, preferably at least 10 ⁇ m, preferably at least 15 ⁇ m, preferably at least 20 ⁇ m, preferably at least 25 ⁇ m, preferably at least 30 ⁇ m, preferably at least 35 ⁇ m, preferably at least 40 ⁇ m, preferably at least 45 ⁇ m, preferably at least 50 ⁇ m, away from the interface between carrier substrate and carrier material of the transfer carrier.
- the properties of the at least one pulsed focused laser beam set in step b) include the diameter of the focal spot, in particular the diameter of the laser beam profile.
- the diameter of the laser focal spot in particular the diameter of the laser beam profile, is 10 ⁇ m to 400 ⁇ m, preferably 10 ⁇ m to 300 ⁇ m, preferably 10 ⁇ m to 250 ⁇ m, preferably 10 ⁇ m to 200 ⁇ m, preferably 15 ⁇ m to 150 ⁇ m. preferably 20 ⁇ m to 100 ⁇ m, preferably 25 ⁇ m to 90 ⁇ m, preferably 30 ⁇ m to 80 ⁇ m, preferably 40 ⁇ m to 80 ⁇ m, preferably 50 ⁇ m to 70 ⁇ m.
- at least one pulsed focused laser beam is emitted in step c) in the form of at least one ultrashort pulse.
- At least one pulsed focused laser beam is particularly preferably emitted in the form of at least one short pulse, in particular a short pulse with a pulse length of 0.1 to 50 ns, preferably 0.5 to 40 ns, preferably 1 to 30 ns 5 to 20 ns.
- the at least one pulsed focused laser beam emitted in step c) has an oval beam profile.
- the at least one pulsed, focused laser beam emitted in step c) particularly preferably has a circular beam profile.
- the at least one pulsed focused laser beam emitted in step c) has an annular beam profile.
- a toroidal vapor bubble can be generated in the transfer material by using a pulsed, focused laser beam with a ring-shaped beam profile.
- At least two, preferably at least three, preferably at least four, pulsed focused laser beams are emitted in step c).
- at least two, preferably at least three, preferably at least four, pulsed focused laser beams are emitted simultaneously.
- At least two, preferably at least three, preferably at least four, pulsed, focused laser beams are emitted with a time offset, in particular at a distance of 5 ns to 100 ps, preferably 10 ns to 50 ps, preferably 10 ns to 10 ps.
- At least two, preferably at least three, preferably at least four, pulsed, focused laser beams are emitted with a time offset at a distance of at least 5 ns, preferably at least 10 ns, preferably at least 20 ns, preferably at least 30 ns, preferably at least 40 ns, preferably at least 50 ns, preferably at least 100 ns, preferably at least 1 ps, preferably at least 2 ps, preferably at least 3 ps, preferably at least 4 ps, preferably at least 5 ps, preferably at least 10 ps, preferably at least 25 ps, preferably at least 50 ps.
- multi-spot optics and/or diffractive beam splitters By using multi-spot optics and/or diffractive beam splitters, it is possible in this way to transmit the data to be transmitted at different points at the same time or at different times Material from the transfer carrier to a receiver carrier.
- the arrangement of the individual pulsed, focused laser beams can be fixed or set flexibly by a spatial modulator (spatial light modulator, SLM).
- the center of the vapor bubble formed in step c) is in the carrier material at a distance of at least 0.1 ⁇ m, preferably at least 0.25 ⁇ m, preferably at least 0.5 ⁇ m, preferably at least 1 ⁇ m at least 2 ⁇ m, preferably at least 3 ⁇ m, preferably at least 4 ⁇ m, preferably at least 5 ⁇ m, preferably at least 10 ⁇ m, preferably at least 15 ⁇ m, preferably at least 20 ⁇ m, preferably at least 25 ⁇ m, preferably at least 30 ⁇ m, preferably at least 35 ⁇ m, preferably at least 40 ⁇ m, preferably at least 45 ⁇ m, preferably at least 50 ⁇ m, away from the interface between the carrier substrate and
- Carrier material of the transfer carrier is particularly preferably formed in the volume of the carrier material and not at the interface between the carrier substrate and the carrier material of the transfer carrier.
- the vapor bubble formed in step c) in the carrier material, in particular in the volume of the carrier material, is particularly preferably a vapor bubble with a predetermined localization, dimensioning and geometry. It is thus possible with the aid of the method according to the invention, by a suitable choice of the properties of the laser beam emitted by the pulsed, tunable laser beam source, in particular by a suitable choice of the laser wavelength, Rayleigh length, pulse length, pulse energy, locus position and/or the laser beam profile, in the carrier material of the transfer carrier to form a vapor bubble in a targeted manner, which has a predetermined localization, dimensioning and geometry.
- the formation of the jet in particular the jet volume, the jet length, the jet speed and/or the jet shape, and the associated quantity and speed of the material to be transferred from the transfer carrier to the receiver carrier can be controlled in a targeted manner.
- the distance between the transfer carrier and the receiver carrier in step d) is 20 ⁇ m to 6000 ⁇ m, preferably 20 ⁇ m to 5000 ⁇ m, preferably 20 ⁇ m to 4000 ⁇ m, preferably 20 ⁇ m to 3000 ⁇ m, preferably 20 ⁇ m to 2000 ⁇ m, preferably 25 ⁇ m to 1800 ⁇ m, preferably 30 ⁇ m to 1600 ⁇ m, preferably 40 ⁇ m to 1400 ⁇ m, preferably 50 ⁇ m to 1200 ⁇ m, preferably 60 ⁇ m to 1100 ⁇ m, preferably 70 ⁇ m to 1100 ⁇ m, preferably 80 ⁇ m to 1000 ⁇ m, preferably 90 ⁇ m to 1000 ⁇ m, preferably 100 ⁇ m to 1000 ⁇ m, preferably 200 ⁇ m to 900 ⁇ m, preferably 300 ⁇ m to 800 ⁇ m, preferably 400 ⁇ m to 800 ⁇ m.
- the distance between the transfer carrier and the receiver carrier in step d) is preferably at least 20 ⁇ m, preferably at least 25 ⁇ m, preferably at least 50 ⁇ m, preferably at least 100 ⁇ m, preferably at least 200 ⁇ m, preferably at least 250 ⁇ m, preferably at least 500 ⁇ m, preferably at least 750 ⁇ m, preferably at least 1000 ⁇ m, preferably at least 1500 ⁇ m, preferably at least 2000 mm, preferably at least 3000 ⁇ m, preferably at least 4000 ⁇ m, preferably at least 5000 ⁇ m.
- the distance between the transfer carrier and the receiver carrier in step d) is at most 6000 ⁇ m, preferably at most 5000 ⁇ m, preferably at most 4000 ⁇ m, preferably at most 3000 ⁇ m, preferably at most 2500 ⁇ m, preferably at most 2000 ⁇ m, preferably at most 1750 ⁇ m, preferably at most 1500 ⁇ m, preferably at most 1250 ⁇ m, preferably at most 1000 ⁇ m, preferably at most 750 ⁇ m, preferably at most 500 ⁇ m, preferably at most 250 ⁇ m, preferably at most 100 ⁇ m.
- the subject matter of the present invention is also a device for laser-induced transfer of material, comprising: an optical system comprising a pulsed, tunable laser beam source and a holder for receiving a transfer carrier. wherein the laser wavelength, Rayleigh length, pulse length, pulse energy, focus position and/or the laser beam profile of at least one pulsed focused laser beam emitted by the laser beam source can be set in the device.
- the device for laser-induced transfer of material is a device for carrying out the method according to the invention.
- the present invention also relates to the use of a pulsed, focused laser beam with a set laser wavelength, Rayleigh length, pulse length, pulse energy, focus position and laser beam profile in a LIFT method for forming at least one vapor bubble with defined localization, dimensions and geometry in a carrier material of a transfer carrier, in particular in the volume the carrier material of a transfer carrier.
- the terms “comprising” and “having” mean that in addition to the elements explicitly covered by these terms, other elements that are not explicitly mentioned can also occur. In connection with the present invention, these terms also mean that only the elements explicitly mentioned are covered and no further elements are present. In this particular embodiment, the meaning of the terms “comprising” and “comprising” is synonymous with the term “consisting of”. In addition, the terms “comprising” and “having” also include compositions that, in addition to the elements explicitly mentioned, also contain other elements that are not mentioned, but which are of a functionally and qualitatively subordinate nature. In this embodiment, the terms “comprising” and “comprising” are synonymous with the term “consisting essentially of”.
- the first and second decimal place or the second decimal place are/is not specified, they are/is to be set as 0.
- an absorber such as that required in the AFA-LIFT or BA-FIFT can advantageously be dispensed with. It was shown that biological material can be reliably transferred from a transfer carrier to a receiver carrier using the method according to the invention and that mammalian cells transferred in this way have a significantly higher survival rate during the transfer than with AFA-LIFT with a wavelength of 355 nm and a titanium absorber layer.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Toxicology (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21181813.3A EP4108376A1 (de) | 2021-06-25 | 2021-06-25 | Laser-induzierter vorwärtstransfer (lift) mit angepasster dampfblase |
| PCT/EP2022/067002 WO2022268876A1 (de) | 2021-06-25 | 2022-06-22 | Laser-induzierter vorwärtstransfer (lift) mit angepasster dampfblase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4359165A1 true EP4359165A1 (de) | 2024-05-01 |
Family
ID=76999581
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21181813.3A Withdrawn EP4108376A1 (de) | 2021-06-25 | 2021-06-25 | Laser-induzierter vorwärtstransfer (lift) mit angepasster dampfblase |
| EP22736228.2A Pending EP4359165A1 (de) | 2021-06-25 | 2022-06-22 | Laser-induzierter vorwärtstransfer (lift) mit angepasster dampfblase |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21181813.3A Withdrawn EP4108376A1 (de) | 2021-06-25 | 2021-06-25 | Laser-induzierter vorwärtstransfer (lift) mit angepasster dampfblase |
Country Status (2)
| Country | Link |
|---|---|
| EP (2) | EP4108376A1 (de) |
| WO (1) | WO2022268876A1 (de) |
-
2021
- 2021-06-25 EP EP21181813.3A patent/EP4108376A1/de not_active Withdrawn
-
2022
- 2022-06-22 WO PCT/EP2022/067002 patent/WO2022268876A1/de not_active Ceased
- 2022-06-22 EP EP22736228.2A patent/EP4359165A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022268876A1 (de) | 2022-12-29 |
| EP4108376A1 (de) | 2022-12-28 |
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