Electric heating – Metal heating – By arc
Reexamination Certificate
2005-12-06
2005-12-06
Johnson, Jonathan (Department: 1725)
Electric heating
Metal heating
By arc
Reexamination Certificate
active
06972392
ABSTRACT:
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/cm2or 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.
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Fukushima Tsukasa
Kaneko Masayuki
Kurosawa Miki
Mizuno Masanori
Moriyasu Masaharu
Johnson Jonathan
Mitsubishi Denki & Kabushiki Kaisha
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