摘要:
As a scanning device for positioning the irradiation position of the laser beam emitted from a laser oscillator at a position of arbitrary coordinates in the commanded mutually orthogonal X-axis direction and Y-axis direction, two galvanomirrors having mutually orthogonal rotary axes and a scan lens are provided, and the light generated from a printed circuit board irradiated with laser beam is detected by a detector, and approval or rejection of inspection result at each position of coordinates is judged on the basis of the output signal of the detector.
摘要:
In a laser beam machining method for a wiring board, a machined portion of the wiring board is irradiated with a pulsed laser beam for a beam irradiation time ranging from about 10 to about 200 μs and with energy density of about 20 J/cm2 or more, thereby machining the wiring board, for example, drilling for a through-hole and a blind via hole, grooving, and cutting for an outside shape.
摘要:
In a laser beam machining method for a wiring board, a machined portion of the wiring board is irradiated with a pulsed laser beam for a beam irradiation time ranging from about 10 to 200 μs and with energy density of about 20 J/cm2 or more, thereby machining the wiring board, for example, drilling for a through-hole and a blind via hole, grooving, and cutting for an outside shape. The laser beam operates at a frequency of more than 67 Hz, and the spot of the laser beam is sequentially moved to different drilling positions for each pulse. After all of many drilling positions in the range of a scan vision are irradiated with the laser beam pulse by pulse, or after the elapse of a time of 15 ms or more from irradiation of the first drilling position, the laser spot is returned to the first drilling position. The spot is sequentially moved once again, and the movement is repeated several times. A pause of 15 ms or more is required between pulses directed to the same drilling position to avoid formation of a thick char layer and projection of glass cloth into the hole.
摘要:
In a laser beam machining method for a wiring board, a machined portion of the wiring board is irradiated with a pulsed laser beam for a beam irradiation time ranging from about 10 to about 200 &mgr;s and with energy density of about 20 J/cm2 or more, thereby machining the wiring board, for example, drilling for a through-hole and a blind via hole, grooving, and cutting for an outside shape.
摘要:
A laser machining device according to the invention is provided with a laser oscillator for generating a laser beam, a main deflecting galvannometer mirror, an Fθ lens, and a sub-deflecting means arranged in an optical path between the laser oscillator and the main deflecting galvanometer mirror. A means for splitting a laser beam is provided, and the sub-deflecting means is inserted into the optical path of one of the split laser beams. At the same time, both the split laser beams are incident from the same main deflecting galvannometer mirror to the Fθ lens, and a numerical aperture in the optical system constituted by the main deflecting galvannometer mirror, the Fθ lens, and an object is set to be not more than 0.08.
摘要:
A process is provided for working a base material which essentially consists of a ceramic material. The process includes an irradiation process of irradiating a laser beam or an electron beam to the base material in order to form an affected portion having cracks in the base material and a removing process for removing the affected portion. The ceramic material includes an oxide ceramic material (for example, alumina and forsterite) and a carbide ceramic material. The shape and the depth of the portion to be worked are controlled by the scanning of the laser beam or the electron beam. The removing process can include any one of the processes of vibrating the base material, applying a thermal shock to the base material and etching the base material. In accordance with the present invention, a base material which essentially consists of an oxide ceramic material or a carbide ceramic material can be worked with high aspect ratio and in a shorter period of time than in a conventional process.
摘要:
An insulated wire having a conductor coated with insulating material wherein a light absorbing layer is provided between the conductor and the insulating material, thereby an insulating coating can be easily peeled off by means of laser.
摘要:
A semiconductor wafer is prepared which includes a semiconductor layer having on its surface a plurality of functional devices, and a separation line region surrounding and separating the plurality of functional devices from one another. A metal layer is formed on the surface of separation line region of semiconductor region. A reinforcing layer is formed on the surface of semiconductor wafer. By selectively etching the back surface of semiconductor layer, a hole is formed to surround the peripheries of functional device, passing through semiconductor layer and reaching from the back surface to metal layer. Reinforcing plate is removed from semiconductor wafer. Metal layer is irradiated with laser and fused to provide a plurality of semiconductor chips separated from one another.
摘要:
A laser inspection apparatus has a light source 13 for outputting laser beam, application means 5, 33, 34 for irradiating the laser beam 7 output from the light source 13 to any desired position of a detected body 21, first detection means 2 for detecting fluorescence 8 generated from the detected body 21 to which the laser beam 7 is applied, and second detection means 3 for detecting reflected light 8 scattered on a surface of the detected body 21 to which the laser beam 7 is applied.
摘要:
A semiconductor wafer is prepared which includes a semiconductor layer having on its surface a plurality of functional devices, and a separation line region surrounding and separating the plurality of functional devices from one another. A metal layer is formed on the surface of separation line region of semiconductor region. A reinforcing layer is formed on the surface of semiconductor wafer. By selectively etching the back surface of semiconductor layer, a hole is formed to surround the peripheries of functional device, passing through semiconductor layer and reaching from the back surface to metal layer. Reinforcing plate is removed from semiconductor wafer. Metal layer is irradiated with laser and fused to provide a plurality of semiconductor chips separated from one another.