Printed wiring board, and method and apparatus for manufacturing the same
First Claim
Patent Images
1. An apparatus for manufacturing a printed wiring board comprising:
- a laser oscillator for oscillating a laser beam; and
an optical system for condensing the laser beam induced from said laser oscillator in a desired position on a substrate of the printed wiring board to form a hole, wherein said optical system is provided with a mask for cutting off the laser beam by a maximum limit of 98%.
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Abstract
In manufacturing a double-layered or a multi-layered printed wiring board, a layer of metamorphic substance, which is created by transmuting a substrate material, is formed on an inner wall of a hole during a perforation process of the substrate utilizing radiation energy. The layer of metamorphic substance prevents conductive materials constituting electrical connection formed on the inner wall of the hole from dispersing over a surface of the substrate or permeating into the substrate.
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Citations
5 Claims
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1. An apparatus for manufacturing a printed wiring board comprising:
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a laser oscillator for oscillating a laser beam; and
an optical system for condensing the laser beam induced from said laser oscillator in a desired position on a substrate of the printed wiring board to form a hole, wherein said optical system is provided with a mask for cutting off the laser beam by a maximum limit of 98%.
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2. An apparatus for manufacturing a printed wiring board comprising:
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a laser oscillator for oscillating a laser beam;
an optical system for condensing the laser beam induced from said laser oscillator in a desired position on a substrate of the printed wiring board; and
a mask for cutting off the laser beam by no more than 98% of the laser beam, wherein said optical system is provided with a shutter for setting a pulse width of the laser to a predetermined value to allow the laser beam to pass therethrough only for a desired time. - View Dependent Claims (3)
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4. An apparatus for manufacturing a printed wiring board comprising;
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a laser oscillator containing gas as a laser medium; and
an optical system for condensing the laser beam induced from said laser oscillator in a desired position on a substrate of the printed wiring board to form a hole, wherein a time required for expelling gas molecules excited by an oscillation signal from the aperture space for inducing the laser beam is in a range of 20 μ
s to 1 ms after said oscillation signal given to said laser oscillator is turned off.- View Dependent Claims (5)
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Specification