Abstract: A method and an apparatus of forming a three-dimensional object, wherein the method includes providing a carrier and an optically transparent member having a build surface, said carrier and said build surface defining a build region therebetween; filling said build region with a polymerizable liquid, continuously or intermittently irradiating said build region with light through said optically transparent member to form a solid polymer from said polymerizable liquid, continuously or intermittently advancing (e.g.

Abstract: A system for retaining a spin-coating fluid when forming a thin film includes a rotatable chuck; a substrate on the rotatable chuck, the substrate having an interior area and an outer perimeter edge; and a fluid retention wall on the outer perimeter edge of the substrate, the fluid retention wall being configured to retain a spin-coating fluid deposited on the interior area of the substrate during rotation of the rotatable chuck.

Abstract: Provided herein is an apparatus for producing three-dimensional objects by additive manufacturing, which may include: (a) optionally a window permeable to an inhibitor of polymerization; (b) a window mount to which the window is secured when the window is present; (c) optionally a carrier platform on which the three-dimensional object can be produced; (d) a carrier platform mount operatively associated with the window mount; (e) a drive assembly operatively associated with the window mount and the carrier platform mount; (f) a light source operatively associated with the window mount operatively associated with a patterning array; (g) an inhibitor of polymerization supply configured for operative association with the feed surface when present; and (h) at least one or two reactant supplies configured for operative association with the feed surface when present. Methods of making a three-dimensional object from a polymerization liquid that may use such apparatus are also provided.

Abstract: A build plate assembly for a three-dimensional printer includes: a lighting panel having individually addressable pixels configured to selectively emit light and/or transmit light from illumination below the pixels to a top surface top surface of the lighting panel; a rigid, optically transparent, gas-impermeable planar screen or base having an upper surface having an uneven surface topology and a lower surface that is affixed to the top surface of the lighting panel; and a flexible, optically transparent, gas-permeable sheet having upper and lower surfaces, the upper surface comprising a build surface for forming a three-dimensional object, the sheet lower surface positioned opposite the base, wherein the build plate is configured to permit gas flow to the build surface.

Abstract: 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, (c) irradiating the build region with light through the optically transparent member and also advancing the carrier away from the build surface to form a three-dimensional solidified polymer object from the polymerizable liquid. The irradiating is carried out with both: (i) an excitation light at a first wavelength that polymerizes the polymerizable liquid, and (ii) a depletion light at a second wavelength, different from the first wavelength, that inhibits the polymerization of the polymerizable liquid. At least one of the excitation and depletion lights is temporally and/or spatially modulated to form the three-dimensional object.

Abstract: A build plate for a three-dimensional printer includes: a rigid, optically transparent, gas-impermeable planar base having an upper surface and a lower surface; and a flexible, optically transparent, gas-permeable sheet having an upper and lower surface, the sheet upper surface comprising a build surface for forming a three-dimensional object, the sheet lower surface positioned on the base upper surface. The build plate includes a gas flow enhancing feature configured to increase gas flow to the build surface.