Title:
FERROUS ALLOY FOIL, MANUFACTURING METHOD THEREFOR, AND COMPONENT USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/244701
Kind Code:
A1
Abstract:
The present invention addresses the problem of reducing the cause of etching failure or pinholes as much as possible in an extremely thin ferrous alloy foil that has a thickness of 10-30 μm and that is applied to a metal mask used for increasing the precision of an electronic component. In order to solve the abovementioned problem, the present invention provides a ferrous alloy foil that has a composition containing at most 0.150% of C, at most 2.00% of Si, at most 10.00% of Mn, 2.00-50.00% of Ni, at most 19.00% of Cr, at most 0.20% of N, at most 0.030% of Al, at most 5.00% of Co, at most 0.0005% of Mg, at most 0.0005% of Ca, at most 0.01% of Ti, at most 0.035% of P, and at most 0.0300% of S, with the balance consisting of Fe and impurities. The amount of Al2O3 is at most 30 mass% and the amount of MgO is at most 15 mass% with respect to the total mass of inclusions having a particle diameter of 2.00 μm or larger, and among the inclusions having a particle diameter of 2.00 μm or larger, the number ratio of inclusions having a particle diameter of no larger than 5.00 μm is 80.00% or higher.
Inventors:
UNNO HIROTO (JP)
YASHIRO ATSUSHI (JP)
OHARA HIROAKI (JP)
SAWADA AYAKA (JP)
FUJIMOTO NAOKI (JP)
SAWAKI NAOYA (JP)
YASHIRO ATSUSHI (JP)
OHARA HIROAKI (JP)
SAWADA AYAKA (JP)
FUJIMOTO NAOKI (JP)
SAWAKI NAOYA (JP)
Application Number:
PCT/JP2022/020256
Publication Date:
November 24, 2022
Filing Date:
May 13, 2022
Export Citation:
Assignee:
NIPPON STEEL CHEMICAL & MAT CO LTD (JP)
International Classes:
B22F9/08; B22F3/15; B22F3/17; B22F3/18; B22F3/24; C21D9/46; C22C33/02; C22C38/00; C22C38/40; C22C38/58
Domestic Patent References:
| WO2017056618A1 | 2017-04-06 | |||
| WO2021172381A1 | 2021-09-02 | |||
| WO2022014307A1 | 2022-01-20 |
Foreign References:
| JP2000273586A | 2000-10-03 | |||
| JP2005290449A | 2005-10-20 | |||
| JPH0361322A | 1991-03-18 | |||
| JP2012092360A | 2012-05-17 | |||
| JP2004183023A | 2004-07-02 | |||
| JP2017088915A | 2017-05-25 | |||
| JP2005256049A | 2005-09-22 | |||
| JP2005274401A | 2005-10-06 | |||
| JP2001262278A | 2001-09-26 | |||
| JP2011202253A | 2011-10-13 | |||
| JP6788852B1 | 2020-11-25 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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