Abstract:
A fine feature formation method and apparatus provide photon induced deposition, etch and thermal or photon based treatment in an area of less than the diameter or cross section of a STED depleted laser beam. At least two STED depleted beams are directed to a reaction location on a substrate where a beam overlap region having an area smaller than the excitation portion of the beams is formed. A reactant or reactants introduced to the reaction region is excited by the combined energy of the excitation portions of the two beams, but not excited outside of the overlap region of the two excitation portions of the beams. A reactant is caused to occur only in the overlap region. The overlap region may be less that 20nm wide, and less than 1nm in width, to enable the formation of substrate features, or the change in the substrate, in a small area.
Abstract:
Improved, high resolution, laser ablated grayscale assembles (A) are provided including a substrate (24a) and a polymer layer (24b) having an etched region (R) presenting areas of different, predetermined thicknesses. Preferably, the region (R) exhibits a maximum RMS roughness value of up to about 5 ran. The fabrication method involves providing a sample (24) having a substrate (24a) and polymer layer (24b), and laser ablating the layer (24b) by multiphoton photolithography to give the different thickness areas characteristic of a desired grayscale pattern. Preferably, the fabrication involves transmissivc laser ablation wherein the incident laser beam is transmitted through the substrate (24a) to ablate the layer (24b). Advantageously, the polymer layer (24b) comprises a poly(alkylene dioxythiophene):poly(styrene sulfonate) mixture.
Abstract:
An imaging system is provided that includes a optical pulse generator for providing an optical pulse having a spectral bandwidth and includes monochromatic waves having different wavelengths. A dispersive element receives a second optical pulse associated with the optical pulse and disperses the second optical pulse at different angles on the surface of the dispersive element depending on wavelength. One or more focal elements receives the dispersed second optical pulse produced on the dispersive element. The one or more focal element recombine the dispersed second optical pulse at a focal plane on a specimen where the width of the optical pulse is restored at the focal plane.
Abstract:
The invention relates to an optical grid system comprising at least one optical grid (3a, 3b) with a grid substrate, to a device for carrying out a moiré measuring technique of an optical test object and to a device and method for substrate structuring by multiple exposure. The invention is characterized by producing at least one grid structure in the grid substrate by wave excitation, especially with a variably adjustable phase and/or with predetermined wavelength or frequency ratio of the wave excitation for two optical grids, e.g. for use in moiré distortion measurements. The invention can be used, e.g., in metrology and in multiple exposure technology of microlithography projection exposure systems.
Abstract:
Preferred embodiments of the present invention provide methods of forming a photolithographic pattern by patternwise imaging each of two or more different modalities of light onto a multiphoton-specific photoinitiator material to form a photolithographic pattern on the surface where each of the patterns of the two or more different wavelengths of light overlap. In various embodiments, the invention provides a method of semiconductor fabrication capable of permitting the formation of an imaged feature having a dimension smaller than lambda/(2NA), where lambda is the smallest wavelength of imaging light, and NA is the numerical aperture of the imaging system.
Abstract:
A method for writing a master image on a substrate includes dividing the master image into a matrix of frames, each frame including an array of pixels defining a respective frame image in a respective frame position within the master image. An electron beam is scanned in a raster pattern over the substrate, while shaping the electron beam responsively to the respective frame image of each of the frames as the electron beam is scanned over the respective frame position, so that in each frame, the electron beam simultaneously writes a multiplicity of the pixels onto the substrate.
Abstract:
A microscope for observing a lithographic product where multi-photon entangled light passes through a first lens (Lens 1), a second lens (Lens 2) and impinges on a surface plane (Image) to observe a specimen.
Abstract:
A method and apparatus for replicating patterns with a resolution well below the diffraction limit, uses broad beam illumination and standard photoresist. In particular, visible exposure (λ = 410 nm) of silver nanoparticles in close proximity to a thin film of g-line resist (AZ 1813) can produce selectively exposed areas with a diameter smaller than λ/20. The technique relies on the local field enhancement around metal nanostructures when illuminated at the surface plasmon resonance frequency. The method is extended to various metals, photosensitive layers, and particle shapes.
Abstract:
A method for the controlled nanometer-scale deposition of atomic or molecular species on a surface (24), by means of coherently controlled optical focusing. The coherent control is conveniently performed by inducing a linear superposition of excited atomic states or molecular bound states respectively, by means of electromagnetic fields supplied by an applied laser beam (13). The optical focusing is conveniently performed by passing a beam (10) of such suitably prepared species through another electromagnetic field supplied by a standing wave (14, 18) induced by two interacting laser beams (20, 22). Altering the characteristics of the laser beams alters the forces operating on the species, thus directing them to the desired position on the surface (24). Selection of the frequencies, intensities, and relative phases of the electromagnetic fields, as well as the geometry of the interaction between the beam and the electromagnetic fields, enables deposition of aperiodic patterns (26) on the surface with a resolution of 10 to 15 nanometers. Such nanoscale focusing of atoms or molecules by coherent light can be used for executing nanometric lithographic processes.
Abstract:
A process and photoactive media for holographic recording and micro/nanofabrication of optical and bio-optical structures via the simultaneous absorption of two-photons by the photoactive media to induce a simultaneous photochemical change in regions of constructive interference within a holographic pattern is disclosed. The photochemical process of polymerization resulting from the simultaneous absorption of two-photons may be used for the microfabrication of micro and nanoscaled features, holographic data storage, and the formation of switchable diffraction gratings. In a specific example, a two beam holographic configuration is used in a set-up (100) with various optics (110, 112, 114) for dividing a single beam and impinging the two beams on a sample plane (118) to interfere with one another.