Abstract:
PROBLEM TO BE SOLVED: To mark smooth narrow marks in which microcracks do not exist and which have a clear edge and a high contrast. SOLUTION: In a method of making subsurface marks in glass, a beam of radiation is applied to the glass 105, the radiation having a wavelength that is not greater than 400 nm. The beam is applied using marking parameters of a marking device (e.g., a laser 101) effective to change a density and a resulting index of refraction of the glass to form subsurface marks having a size not greater than 50 μm without forming microcracks in the glass and without marking the surface of the glass. Another aspect is the glass having the subsurface marks disposed in a range of 20 to 200 μm below an outer surface of the glass. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To sever at least one of edge portion from a central portion in a glass ribbon having beads at opposite edge portions thereof.SOLUTION: A method for fabricating a glass ribbon includes steps of: providing a source 105 of the glass ribbon 103 with a pair of opposed edge portions 201 and 203 and the central portion 205 laterally spanning between the opposed edge portions; traversing the glass ribbon in a downward direction 121 relative to the source through a downward zone 123; bending the glass ribbon in a bending zone downstream 125 from the downward zone, wherein the glass ribbon includes an upwardly concave surface through the bending zone; traversing the glass ribbon into a cutting zone 147 downstream from the bending zone; and bending the glass ribbon in the cutting zone to provide a bent target segment 151 with a bent orientation in the cutting zone. The method also includes a step of severing at least one of the edge portions from the central portion of the bent target segment within the cutting zone.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of machining sintered electrolyte sheets and fuel cell devices which is used to: cut the electrolyte sheets and/or fuel cell device components to appropriate sizes; trim the edges of the sintered electrolyte sheets or fuel cell devices; and/or form via holes and surface modifications or patterns.SOLUTION: A sintered electrolyte sheet comprises: a body with a thickness of 45 μm or less; and at least one laser machined feature with at least one edge surface having at least 10% ablation. A method of micromachining the electrolyte sheet includes the steps of: (i) supporting a sintered electrolyte sheet; (ii) micromachining said sheet with a laser, where said laser has a wavelength less than 2 μm, a fluence less than 200 J/cm, a repetition rate (RR) between 30 Hz and 1 MHz, and a pulse duration less than 1 μs.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for separating a brittle material sheet into a plurality of individual pieces without physical contact with a brittle material layer that has a protective coating on its surface.SOLUTION: A method of separating a sheet 10 of coated brittle material includes the steps of: providing the sheet 10 of layered brittle material comprising the brittle material layer 12 and a coating material 14 adhered to a surface of the brittle material layer; applying laser 18 along a separation line in the sheet 10, thereby cutting the coating material 14; and separating the brittle material layer 12 by inducing a stress fracture in the brittle material layer 12.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and a method which can correctly control the discharge of water from a spray nozzle upon quenching a hot glass sheet.SOLUTION: A spray nozzle is located in proximity to a glass sheet, creating gas in liquid used to quench the glass located in the nozzle. The gas is removed from quenching liquid. Then, the spray nozzle is used to spray the quenching liquid onto the sheet at a scoring position. The spray nozzle (purge nozzle) has a purge opening and tubing leading to a discharge location. The purge nozzle can have a sloped passageway that pre-stages gas bubbles near the purge opening in the nozzle. The spray nozzle can include a cooling coil passing around a nozzle passageway that enables a coolant to travel along the coil. This cools the quenching liquid passing through the nozzle, and increases the solubility of gas bubbles in the quenching liquid in the nozzle. A gas filter can receive gas-rich quenching liquid from the pressurized quenching liquid source, remove gas from the quenching liquid, and send gas-depleted quenching liquid to the spray nozzle.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and a method which can correctly control the discharge of water from a spray nozzle upon quenching a hot glass sheet. SOLUTION: The spray nozzle is located in proximity to the glass sheet, creating gas in liquid used to quench the glass located in the nozzle. The gas is removed from the quenching liquid. Then, the spray nozzle is used to spray the quenching liquid onto the sheet at a scoring position. The spray nozzle (purge nozzle) has a purge opening and tubing leading to a discharge location. The purge nozzle can have a sloped passageway that pre-stages gas bubbles near the purge opening in the nozzle. The spray nozzle can include a cooling coil passing around the nozzle passageway that enables a coolant to travel along the coil. This cools the quenching liquid passing through the nozzle, and increases the solubility of bubbles in the quenching liquid in the nozzle. A gas filter can receive gas-rich quenching liquid from the pressurized quenching liquid source, remove gas from the liquid, and send gas-depleted quenching liquid to the spray nozzle. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
A sintered electrolyte sheet comprising: a body of no more than 45 μm thick and laser machined features with at least one edge surface having at least 10% ablation. A method of micromachining the electrolyte sheet includes the steps of: (i) supporting a sintered electrolyte sheet; (ii) micromachining said sheet with a laser, wherein said laser has a wavelength of less than 2 μm, fluence of less than 200 Joules/cm2, repetition rate (RR) of between 30 Hz and 1 MHz, and cutting speed of preferably over 30 mm/sec.