摘要:
A system and method depositing metal to form a three-dimensional (3D) part on a substrate (140). A wire (120) is moved relative to a location on the substrate while a laser heats a proximal end of the wire at the location using a laser beam (130). The laser causes the wire and substrate to reach a melting point of the wire to fuse the wire at the location on the substrate. The wire can be preheated by passing a current through the wire.
摘要:
The present invention relates to a device for drilling a substrate (5), in particular a device for generating a hole or recess or well in an electrically insulating or semiconducting substrate (5), more specifically a device for generating a plurality of holes or recesses or wells in an electrically insulating or semiconducting substrate (5). The present invention also relates to a method for drilling a substrate (5). Furthermore, the present invention relates to a use of the device for drilling a substrate (5).
摘要:
The invention relates to a method of producing corrosion-resistant and workable sheet metal consisting of uncoated steel sheets (1, 1'), comprising the following steps: - placing the steel sheets (1, 1') in abutting relationship, - welding the or each joint groove (14) by butt-joint welding by means of a welding beam (13) for forming a weld (2) along the respective joint groove (4), - thermal treatment of the or each weld (2) directly after or even during the forming of the weld (2) by means of an annealing beam (15), - full-surface coating of the joined steel sheets (1, 1'), including the or each weld (2), after cooling the welds (2), with a metallic coating.
摘要:
A new technique and Method of Direct Coulomb Explosion in Laser Ablation of Semiconductor Structures in semiconductor materials is disclosed. The Method of Direct Coulomb Explosion in Laser Ablation of Semiconductor Structures provides activation of the "Coulomb explosion" mechanism in a manner which does not invoke or require the conventional avalanche photoionization mechanism, but rather utilizes direct interband absorption to generate the Coulomb explosion threshold charge densities. This approach minimizes the laser intensity necessary for material removal and provides optimal machining quality. The technique generally comprises use of a femtosecond pulsed laser to rapidly evacuate electrons from a near surface region of a semiconductor or dielectric structure, and wherein the wavelength of the laser beam is chosen such that interband optical absorption dominates the carrier production throughout the laser pulse. The further application of a strong electric field to the semiconductor or dielectric structure provides enhancement of the absorption coefficient through a field induced fedshift of the optical absorption. The use of this electric field controlled optical absorption is available in all semiconductor materials and allows precise control of the ablation rate. When used in conjunction with nanoscale semiconductor or dielectric structures, the application of a strong electric field provides for laser ablation on sub-micron lateral scales.
摘要:
A method and system to weld or overlay workpieces employing a high intensity energy source to create a puddle and at least one resistive filler wire which is heated to at or near its melting temperature and deposited into the weld puddle. The filler wire comprises a core and an electrically conductive outer matrix having particles to be deposited into the puddle.
摘要:
The present invention relates to a method of generating a hole or well in an electrically insulating or semiconducting substrate, and to a hole or well in a substrate generated by this method. The invention also relates to an array of holes or wells in a substrate generated by the method.
摘要:
A charged particle beam and a laser beam are used together to micromachine a substrate. A first beam alters the state of a region of the work piece, and the second beam removes material whose state was altered. In one embodiment, an ion beam can create photon absorbing defects to lower the local ablation threshold, allowing the laser beam to remove material in a region defined by the ion beam. The combination of laser beam and charged particle beam allows the creation of features similar in size to the charged particle beam spot size, at milling rates greater than charged particle processing because of the increased energy provided by the laser beam.
摘要:
A new technique and Method of Direct Coulomb Explosion in Laser Ablation of Semiconductor Structures in semiconductor materials is disclosed. The Method of Direct Coulomb Explosion in Laser Ablation of Semiconductor Structures provides activation of the "Coulomb explosion" mechanism in a manner which does not invoke or require the conventional avalanche photoionization mechanism, but rather utilizes direct interband absorption to generate the Coulomb explosion threshold charge densities. This approach minimizes the laser intensity necessary for material removal and provides optimal machining quality. The technique generally comprises use of a femtosecond pulsed laser to rapidly evacuate electrons from a near surface region of a semiconductor or dielectric structure, and wherein the wavelength of the laser beam is chosen such that interband optical absorption dominates the carrier production throughout the laser pulse. The further application of a strong electric field to the semiconductor or dielectric structure provides enhancement of the absorption coefficient through a field induced fedshift of the optical absorption. The use of this electric field controlled optical absorption is available in all semiconductor materials and allows precise control of the ablation rate. When used in conjunction with nanoscale semiconductor or dielectric structures, the application of a strong electric field provides for laser ablation on sub-micron lateral scales.
摘要:
Laser processing is enhanced by using endpointing or by using a charged particle beam together with a laser. Endpointing uses emissions, such as photons, electrons, ions, or neutral particles, from the substrate to determine when the material under the laser has changed or is about to change. Material removed from the sample can be deflected to avoid deposition onto the laser optics.