344results about "3-dimensional image production" patented technology

The present invention relates to photohardenable compositions and methods of forming an object, the method preferably including a photohardenable composition described herein. Preferred photohardenable compositions and methods include a photohardenable resin component, a first photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength, and a second photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength. Preferred first photoinitators include photoswitchable photoinitiators. Preferably the second light-activated photoinitiator comprises a free-radical photoinitiator. Hardenable resin compositions and methods of forming an object including the hardenable resin composition are also disclosed.

Provided are photocurable resins comprising a poly(siloxane)-based copolymer together with a photoinitiator, and other optional ingredients such as a photocurable diluent, a photoabsorber, a photosensitizer, or a hydrophillic additive. Also provided are methods of stereolithographically printing a 3-D object from a disclosed resin. Also provided is an improved method for stereolithographically printing a 3-D object, the improvement comprising the use of a disclosed photocurable resin. Further provided is a 3-D microfluidic device such as an artificial lung prepared from a disclosed photocurable resin.

The present invention includes methods for forming an object in a volume including a photohardenable composition described herein that includes a photohardenable resin component and a photoswitchable photoinitiator comprising a P-type photochromic molecule. The present invention also includes photoswitchable photoinitiators comprising a P-type photochromic molecule, preferably comprising a P-type diarylethene molecule, and photohardenable compositions and methods including such photoswitchable photoinitiators.

A device for modelling physiological and pathophysiological states of the brain is provided. The device comprises a hydrogel with micropattern channels having a length, width and depth. The micropattern channels comprise cells selected from the group consisting of neurons, astrocytes, microglia, oligodendrocytes, neuronal organoids, cancer cells, cancer spheroids, brain tumoral cells and combinations thereof.

The present invention relates to photohardenable compositions and methods of forming an object, the method preferably including a photohardenable composition described herein. Preferred photohardenable compositions and methods include a photohardenable resin component, a first photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength, and a second photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength. Preferred first photoinitators include photoswitchable photoinitiators. Preferably the second light-activated photoinitiator comprises a free-radical photoinitiator. Hardenable resin compositions and methods of forming an object including the hardenable resin composition are also disclosed.

1. A resin composition for 3D printing of objects, comprising: a photocurable component A serving as a 3D structurable matrix; a component B serving as a synergistic combination of flame retardants; and at least one photoinitiator suitable for polymerization by light excitation, wherein, based on the total weight of components A and B, the amount of curable component A is in the range of 60% to 95% by weight, preferably 65% ​​to 90% by weight, and more preferably 70% to 85% by weight; the amount of flame retardant component B is in the range of 5% to 40% by weight, preferably 10% to 35% by weight, and more preferably 15% to 30% by weight, based on the total weight of components A and B; and the amount of photoinitiator is in the range of 0.01% to 10% by weight, based on the weight of component A alone.

Photoswitchable photoinitiators comprising a photochromic molecule including one or more substituents at least one of which comprises a substituted or unsubstituted alpha-diketone moiety represented by general formula Ar1—C(═O)—C(═O)—Ar2, wherein Ar1 and Ar2 are the same or different and are independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group. Preferably the photochromic molecule comprises a benzospiropyran molecule, a naphthopyran molecule, or a spironaphthoxazine molecule. Photohardenable compositions, hardenable resin compositions, and methods for forming an object, which photohardenable compositions, hardenable resin compositions, and methods include a photoswitchable photoinitiator described herein, are also disclosed.

The present invention relates to a process, an apparatus and photoswitchable photoinitiators for locally polymerizing a starting material by dual color photopolymerization and a method for volumetric printing of a shaped body (xolography). In particular, photoinitiators are provided, which cause raring of photopolymerizable formulations upon irradiation with two different wavelengths and which maybe used for volumetric printing (xolocure initiators).

This disclosure provides laser markable polymerizable resin compositions comprising infrared absorbing marking additives to achieve improved laser markability of 3-D printed objects obtained from these polymerizable resin composition, and methods for marking the cured resin compositions using an infrared laser.

A method for manufacturing a low-angle blazed grating on a semiconductor or silicon substrate, includes spin-coating the substrate with resist layer or hydrogen or polysilsesquioxane, being 100-1000 nm or few hundred nanometers thick, applying grayscale irradiation lithography exposure to the resist layer, generating a dose modulated pattern therein, varying in response to absorbed energy density from irradiation lithography exposure. The coated, irradiated substrate is developed in solution, such as TMAH or NaOH, enabling a blazed profile having structures of thickness-dependent diffusion barriers or SiO2, with 0-1000 nm height to emerge. Thermal oxidation in oxygen atmosphere at elevated temperature with the developed substrate, converts the upper silicon substrate layer into SiO2 to a depth depending on the thickness of the pattern in the resist layer above. Hydrofluoric acid fluid removes the SiO2, creating low-angle low-roughness blazed grating structure on silicon substrate.

Improved systems and methods for performing multi-photon lithography are presented. The line-scan time-focused two-photon lithography (LS-TFTPL) technique enables the patterning of three-dimensional structures at high throughput. An example LS-TFTPL system may include: a pulsed laser; a first optical component for expanding the light pulse into an elongated or linear cross-section; a digital micromirror device for modulating the light pulse in a linear pattern and dispersing spectral components of the modulated light pulse; and a second optical component for focusing the dispersed spectral component of the modulated light pulse at a line in or on the target material. The focused spectral component may alter the target material within a selected voxel along the line, where the selected voxel spatially corresponds to the linear pattern.

Photohardenable compositions comprising a photohardenable component and a photoswitchable photoinitiator, wherein the photoswitchable photoinitiator is activatable by exposure to light having a first wavelength and light having a second wavelength to induce a crosslinking or polymerization reaction in the photohardenable component, and wherein the photohardenable composition displays non-Newtonian rheological behavior are disclosed. Methods including such photohardenable compositions for printing one or more objects are also disclosed.

An actinic radiation curable composition includes one or more oxetane functional compounds; b) one or more epoxy functional compounds; c) one or more (meth) acry late functional compounds; and d) one or more photoinitiators. The oxetane functional compounds are present in the composition at from 55% to 90%, preferably from 60% to 90%, more preferably from 70% to 90%, by weight based on the total weight of the oxetane functional compounds and the epoxy functional compounds in the composition.

To provide a method for manufacturing a three-dimensional horology component of a shape that is complex on a micrometric or nanometric scale.SOLUTION: A method for manufacturing a horology component 6 at least comprises: a step of manufacturing, from a first photosensitive resin, a first structure comprising at least one photosensitive resin layer comprising a first pattern obtained by polymerizing the first photosensitive resin by irradiation through at least one mask, and then developing the first photosensitive resin; and a step of transforming the first structure into a second structure by structuring at least one surface of the first structure by addition of a second photosensitive resin to the at least one surface, the second structure being intended to at least partially form a manufacturing mold for the horology component.SELECTED DRAWING: Figure 2

The disclosure relates to the field of micro-nano structure-enhanced heat transfer surfaces and provides a 3D printing-assisted multi-scale metal three-dimensional surface structure preparation method and product. The method includes the following steps. A micron-level and highly-precise three-dimensional structure mask is prepared through a 3D printing technology, the hollow portion of mask is matched with the target structure model. Material conversion is performed on a metal matrix fixed with the mask, and a target metal is obtained. Herein, the metal matrix is machined first, and a surface of the target metal is matched with the structure model. In the preparation method provided in the disclosed embodiment, the precision of the metal structure is improved by improving the precision of the template. The multi-scale and multi-material heat exchange structure with micron-level precision and a complex structure is prepared on the metal surface to improve the heat exchange efficiency of phase change

The present invention includes methods for forming an object in a volume including a photohardenable composition described herein that includes a photohardenable resin component and a photoswitchable photoinitiator comprising a P-type photochromic molecule. The present invention also includes photoswitchable photoinitiators comprising a P-type photochromic molecule, preferably comprising a P-type diarylethene molecule, and photohardenable compositions and methods including such photoswitchable photoinitiators.

The invention discloses a manufacturing method of a three-dimensional gray scale structure and a three-dimensional micro-nano structure based on low-voltage ice gel electron beam exposure. The manufacturing method comprises the following steps: depositing an ice layer on a processing surface; then, low-energy electron beam layered exposure is utilized, the ice layer of the specific part of each layer is removed, and finally a three-dimensional gray scale ice sculpture structure with a specific gray scale pattern is formed; selectively depositing a material on the three-dimensional ice sculpture structure by adopting physical vapor deposition to form a three-dimensional micro-nano structure; the ice layer is water ice; and the energy of the low-voltage electron beam is lower than 5keV. According to the method, a three-dimensional ice sculpture structure without a supporting structure can be obtained by utilizing the characteristics of iEBL and low-energy exposure in water ice, and gray scale ice sculpture can be successfully converted into a high-purity three-dimensional metal structure. The breakthrough provides potential for improving nano device manufacturing by adopting a water ice resist, and establishes a key technical position of the iEBL in construction of a fine and pollution-free three-dimensional metal nano structure.

Matrix-filled liquid radiation curable resin compositions for additive fabrication are described and claimed. Such resins include a cationically polymerizable component that is an aliphatic epoxide, a multifunctional (meth)acrylate component, a cationic photoinitiator, a free-radical photoinitiator, and a matrix of inorganic fillers, wherein the matrix further constitutes prescribed ratios of at least one microparticle constituent and at least one nanoparticle constituent. Also described and claimed is a process for using the matrix-filled liquid radiation curable resins for additive fabrication to create three dimensional parts, and the three-dimensional parts made from the liquid radiation curable resins for additive fabrication.

Matrix-filled liquid radiation curable resin compositions for additive fabrication are described and claimed. Such resins include a cationically polymerizable component, a (meth)acrylate component, a cationic photoinitiator, a free-radical photoinitiator, and a filled matrix comprising a filled particle dispersion, wherein the filled particle dispersion constitutes prescribed ratios of at least one microparticle constituent and at least one nanoparticle constituent, and has a particle dispersion pH of greater than 5.5. Also described and claimed are three-dimensional parts made from the liquid radiation curable resins for additive fabrication.

The present invention presents improved systems and methods for performing multi-photon lithography. A line-scanning temporally focused two-photon lithography (LS-TFTPL) technique is capable of patterning three-dimensional structures with high throughput. An example LS-TFTPL system may include a pulsed laser, first optical components for expanding light pulses into an elongated or line cross section, a digital micromirror device for modulating the light pulses with a linear pattern and dispersing spectral components of the modulated light pulses, and second optical components for focusing the dispersed spectral components of the modulated light pulse at a line in or on a target material. The focused spectral components may alter the target material within selected voxels along the line, where the selected voxels spatially correspond to the linear pattern.

A method of forming a three-dimensional object is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid comprising a mixture of: (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from the first component; (c) irradiating the build region with light through the optically transparent member to form a solid blocked polymer scaffold and advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, with the intermediate containing the second solidifiable component; and then (d) solidifying and / or curing the second solidifiable component to form from said three-dimensional intermediate the three-dimensional object.

A liquid photohardenable composition for volumetric printing including a photohardenable resin component, a dual-wavelength photoinitiator, and a thixotrope,, wherein the liquid photohardenable composition exhibits non-Newtonian rheological behavior and a light transmittance greater than 90% for a 5 centimeter (cm) pathlength. Preferably such transmissivity remains above 90% for at least 10 days after preparation. Preferably the liquid photohardenable composition exhibiting non-Newton rheological behavior has a yield stress greater than or equal to about 5 Pascals at 50 degrees Celsius, Methods of forming an object in a volume of a liquid photohardenable composition of the invention and a method for screening thixotropes for inclusion in a liquid photohardenable composition are also disclosed.

The present invention provides a stereolithography 3D printing assembly, comprising a digital projection system that projects a first digitally defined pattern having a first resolution at a projection location, and a photomask system that projects a second pattern having a second resolution, the second pattern and the first pattern being aligned with each other at the projection location, and the photomask system providing at least one photomask between the digital projection system and the projection location, which provides a high speed 3D printing assembly capable of high resolution detail.

The present application relates to a lens for focusing at least two partial rays of a light ray incident on the lens into at least one predetermined depth of an image space, comprising: (a) a focusing unit with at least one optical element; (b) at least one combined beam-splitting and aberration-compensating unit, which is configured to split the light ray entering the lens into at least two partial rays and to compensate for at least one aberration of the at least one optical element of the focusing unit in advance; and (c) wherein the at least one optical element is configured to focus the at least two partial rays leaving the combined beam-splitting and aberration-compensating unit into the at least one predetermined depth of the image space.

To form a dual damascene structure in a photoresist.SOLUTION: Embodiments of the present disclosure include apparatuses and methods for fabricating dual damascene structures. A first portion in the first region of the photoresist is exposed to a first dose of electromagnetic radiation from a radiation source. The first portion has a first depth and a first surface area. A second portion of the photoresist in the first region is exposed to a second dose of electromagnetic radiation from the radiation source. The second portions have a second depth and a second surface area, and each of the first surface areas of the first portions is disposed within one of the second surface areas of the second portions. A third portion in the second region of the photoresist is exposed to a first dose of electromagnetic radiation from a radiation source. The third portion has a first depth and a first surface area.SELECTED DRAWING: Figure 5

A composition includes (I) an alkali-soluble material; and (II) a fluorine-containing compound having a crosslinking group, wherein a mass ratio of a content of the component (II) to a content of the component (I) ((II) / (I)) is 0.0000005 to 0.01. A cured film is made from the composition.

The present invention relates to a curable composition, which comprises: (A) at least one component containing an ethylenically unsaturated group, wherein component (A) comprises a component (A1) containing a structure (K) selected from an isocyanurate structure and / or a tricyclodecane ring structure; and (B) at least one photo-initiator, wherein the average glass transition temperature (Tg,av) calculated from the curable composition using the following Fox's equation is at least 373.15K, preferably at least 393.15K, more preferably at least 423.15K, wherein Tg,i is the glass transition temperature in Kelvin of the homopolymer of component (i) constituting component (A), and w, is the mass fraction of component (i) in component (A); to a process of forming a 3D-printed object from the same and a 3D-printed object prepared therefrom. The 3D-printed object obtained from the curable composition of the present invention has high HDT and excellent mechanical performances.1Tg,av=∑wiTg,i

The present invention relates to a process, an apparatus and a photoswitchable photoinitiator for locally polymerizing a starting material by bichromatic photopolymerization, as well as a method for volume printing (xolography) of shaped bodies. In particular, photoinitiators are provided that induce the curing of photopolymerizable formulations upon irradiation with two different wavelengths and can be used for volume printing (xolocure initiators).

The invention relates to a method for generating a three-dimensional structure in a lithographic material (12), comprising the following steps: receiving the lithographic material (12) by means of a lithographic material receptacle (14); generating an input laser beam (20) by means of a laser beam source (18); demultiplexing the input laser beam (20) by temporally splitting the input laser beam (20) to form a plurality of laser write beams (26); focusing the plurality of laser write beams (26) by means of an objective lens (70); a three-dimensional structure is generated in a lithographic material (12) by means of a focused laser write beam (26).

Title: Method for manufacturing curved wall patterns by photolithography The invention relates to a method for forming, by defocused lithography, a stack (1) comprising a photosensitive layer (10) based on a photosensitive resin comprising so-called "diffusing" particles, said stack (1) further comprising at least one pattern (20, 20') delimited at least in part by a curved side wall such that an intersection of the curved wall with a plane substantially perpendicular to the main extension plane of the stack (1) forms a curved line. The invention also relates to the production of an optoelectronic device (100) comprising the stack (1), in which the at least one pattern (20, 20') is at least one cavity delimited at least in part by said curved side wall, and at least one light-emitting diode (50) arranged in the at least one cavity (20). Figure for abstract: Fig.12.