Title:
METHOD FOR CUTTING METAL FOIL WITH LASER
Document Type and Number:
WIPO Patent Application WO/2022/019311
Kind Code:
A1
Abstract:
In this method for cutting a metal foil with a laser, for example, a workpiece, which is a metal foil, is laser cut by intermittently irradiating the surface of the workpiece with pulsed laser light at a frequency of 1 MHz or less. Furthermore, for example, when the frequency is A [Hz] and the full width at half maximum of the pulse is B [s], the duty ratio Rd [%], which is expressed as Rd = A × B × 100, may be 0.1-80. Furthermore, when the full width at half maximum is B and the 1/e2 width of the pulse is F [s], the pulse ratio Rp, which is expressed as Rp = F/B, may be 1-7, the M2 beam quality of the laser light may be 1.2 or less, and the energy radiated by the pulse may be 0.1 [mJ] or greater.
Inventors:
MATSUNAGA KEIGO (JP)
MURAYAMA TARO (JP)
SAKAI TOSHIAKI (JP)
KAYAHARA TAKASHI (JP)
SHIGEMATSU TAKASHI (JP)
MURAYAMA TARO (JP)
SAKAI TOSHIAKI (JP)
KAYAHARA TAKASHI (JP)
SHIGEMATSU TAKASHI (JP)
Application Number:
PCT/JP2021/027216
Publication Date:
January 27, 2022
Filing Date:
July 20, 2021
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
B23K26/38; B23K26/0622; H01M4/139; H01M4/64; H01M4/66
Foreign References:
| JP2017084691A | 2017-05-18 | |||
| JP2013094838A | 2013-05-20 | |||
| JP2005511314A | 2005-04-28 |
Other References:
PATWA, RAHUL ET AL.: "High speed laser cutting of electrodes for advanced batteries", INTERNATIONAL CONGRESS ON APPLICATIONS OF LASERS & ELECTRO OPTICS, 2010
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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