Abstract: The present invention comprises a plurality of repair devices (3) that are arranged on a support film (2), each of which has a repair element in an opening (7) that is surrounded by a light shielding wall (6) for repairing a defective pixel (21) on a full-color LED display panel.

Abstract: A semiconductor device can be transferred onto a circuit board with high accuracy, and a man-hour and a facility load in a process of peeling off the semiconductor device from a sapphire substrate are reduced. A semiconductor-device-formed sapphire substrate in which gallium-nitride-based semiconductor devices are arrayed and formed on a sapphire substrate includes a nitrogen-gallium re-fusion layer A at an interface between the sapphire substrate and the semiconductor devices. An adhesive strength of the nitrogen-gallium re-fusion layer is smaller than an adhesive strength of an adhesive layer for bonding the semiconductor devices to a circuit board.

Abstract: A substrate mounting method of an electronic component on a wiring substrate includes steps of patterning to form a conductive elastic protrusion on an electrode pad provided on the wiring substrate to correspond to a contact point of the electronic component, forming an adhesive layer made of a photosensitive thermosetting resin on the wiring substrate, lowering viscosity of the adhesive layer by heating the adhesive layer to a first temperature zone, electrically connecting the contact point of the electronic component to the electrode pad on the wiring substrate through the conductive elastic protrusion, under a state where the viscosity of the adhesive layer is lowered, by pressing the electronic component after the electronic component is positioned on the wiring substrate, and fixing the electronic component onto the wiring substrate by heating the adhesive layer to a second temperature zone higher than the first temperature zone to cure the adhesive layer.

Abstract: The present invention provides a method for manufacturing an LED display including a wiring board and LEDs arranged at a constant distance from the wiring board. The method includes: aligning an LED substrate 1 having LEDs 11 with a wiring board 2, and pressing and joining the LED substrate onto the wiring board. Each LED has a bonding surface. The wiring board includes bonding layers. The aligning step is performed so that the bonding surfaces are joined on the bonding layers in the pressing and joining step. The method further includes: temporarily bonding the LEDs onto the wiring board by curing the bonding layers through irradiation with ultraviolet light UV; peeling off the LEDs from the LED substrate through irradiation with laser light L; and permanently bonding the LEDs onto the wiring board by heating the bonding layers of the LEDs so as to further cure the bonding layers.

Abstract: The present invention relates to a manufacturing method for an LED display panel including an LED array substrate 1 on which multiple LEDs 4 are arranged in a matrix form, and light shielding walls 3 formed on the LED array substrate 1 and surrounding the LEDs 4. The light shielding walls 3 are formed by exposing and developing a transparent photosensitive resin 16 by photolithography, to form partition walls 7, each serving as a base material of a light shielding wall 3, and then, by forming, on a surface of each partition wall 7, a thin film 8 that reflects or absorbs light emitted from an LED 4.

Abstract: The present invention provides a laser lift-off processing method performed on a laminate 1 including a sapphire substrate 11 and micro LEDs 12 formed on a first surface of the sapphire substrate, by irradiating the laminate with pulse-oscillated laser light from a second surface of the sapphire substrate and thereby separating the micro LEDs therefrom. The method includes: flattening the sapphire substrate by pressing it with an external force to correct its warpage; and separating the micro LEDs from the flattened sapphire substrate by irradiating the laminate with the laser light from the second surface while moving the laminate placed on a stage 91 relative to an optical system 6 such that the laser focal point sequentially coincides with boundary portions between the sapphire substrate and the micro LEDs. The method allows for satisfactorily separating the micro LEDs from the sapphire substrate even if it is warped.

Abstract: The invention provides a method for producing a deposition mask that includes forming of an opening pattern 1 at a predetermined position in a resin film 2 by laser processing so as to penetrate therethrough. The method including the steps of: forming a meniscus of a liquid film 14 between the resin film 2 and a smooth surface 13b of a reference substrate 13 supporting the resin film 2; and after the resin film 2 and the reference substrate 13 are brought into close contact with an adsorption force generated by Laplace pressure, forming the opening pattern 1 by performing the laser processing. Accordingly, it is possible to increase the speed of the laser processing without generating a burr on an edge portion of the opening pattern.

Abstract: The invention provides a method for producing a deposition mask that includes forming of an opening pattern 1 at a predetermined position in a resin film 2 by laser processing so as to penetrate therethrough. The method including the steps of: forming a meniscus of a liquid film 14 between the resin film 2 and a smooth surface 13b of a reference substrate 13 supporting the resin film 2; and after the resin film 2 and the reference substrate 13 are brought into close contact with an adsorption force generated by Laplace pressure, forming the opening pattern 1 by performing the laser processing. Accordingly, it is possible to increase the speed of the laser processing without generating a burr on an edge portion of the opening pattern.

Abstract: In a laser lighting device, a fly's eye lens and a condenser lens are disposed in an optical path of pulsed laser light emitted from a light source, and an electro-optical crystal element for continuously changing the deflection direction of the pulsed laser light with respect to the incident light and allowing the deflected light to pass therethrough is disposed in a position between the light source and the fly's eye lens or between the fly's eye lens and the condenser lens. The electro-optical crystal element is formed, for example, of a pair of electrodes and an optical crystal material disposed between the electrodes, and a voltage is applied between the electrodes to produce an electric field that changes the refractive index of the electro-optical crystal element. As a result, non-uniform illumination due to interference fringes produced by light having passed through the fly's eye lens can be reduced.

Abstract: A pulsed laser oscillator includes at least one first electrooptical element that polarizes light according to an applied voltage and a voltage control unit that applies a voltage to the first electrooptical element and controls the voltage. The voltage control unit changes over time a voltage value applied to the first electrooptical element, to control a pulse width of laser light.

Abstract: A pulsed laser oscillator includes at least one first electrooptical element that polarizes light according to an applied voltage and a voltage control unit that applies a voltage to the first electrooptical element and controls the voltage. The voltage control unit changes over time a voltage value applied to the first electrooptical element, to control a pulse width of laser light.

Abstract: In a laser lighting device, a fly's eye lens and a condenser lens are disposed in an optical path of pulsed laser light emitted from a light source, and an electro-optical crystal element for continuously changing the deflection direction of the pulsed laser light with respect to the incident light and allowing the deflected light to pass therethrough is disposed in a position between the light source and the fly's eye lens or between the fly's eye lens and the condenser lens. The electro-optical crystal element is formed, for example, of a pair of electrodes and an optical crystal material disposed between the electrodes, and a voltage is applied between the electrodes to produce an electric field that changes the refractive index of the electro-optical crystal element. As a result, non-uniform illumination due to interference fringes produced by light having passed through the fly's eye lens can be reduced.