Title:
HIGH STRENGTH ALLOY STRIP FOR FLAT MASK HAVING EXCELLENT ETCHING PIERCEABILITY
Document Type and Number:
Japanese Patent JP3469882
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To develop a high strength Fe-Ni-Co based or Fe-Ni based alloy strip for a flat mask which has excellent etching pierceability.
SOLUTION: In an Fe-Ni-Co based alloy having a composition containing, by mass, 4.0 to 6.0% Co and 36.0 to 38.0% Ni+Co, and the balance Fe with inevitable impurities, or an Fe-Ni based alloy having a composition containing 35.0 to 37.0% Ni, and the balance Fe with inevitable impurities, 0.05 to 0.40% Nb is further incorporated, and the content of O as inevitable impurities is ≤0.0050%. The composition of inclusions of a ≥10 μm length present in the cross section parallel to the rolling direction before etching piercing consists of multiple oxide of niobium oxide and oxide containing at least one or more kinds selected from Al and Si.
Inventors:
Toshiyuki Ono
Application Number:
JP2001089055A
Publication Date:
November 25, 2003
Filing Date:
March 27, 2001
Export Citation:
Assignee:
Nikko Metal Co., Ltd.
International Classes:
C22C38/00; C22C38/08; C22C38/12; H01J9/14; H01J29/07; (IPC1-7): C22C38/00; C22C38/12; H01J9/14; H01J29/07