Low magnetic loss metal tape with biaxial texture and manufacturing method thereof

• US 20060159949A1
• Filed: 03/07/2005
• Published: 07/20/2006
• Est. Priority Date: 01/20/2005
• Status: Active Grant

• Current Assignee: Korea Institute of Machinery and Materials (Dawonsys Co., Ltd.)
• Original Assignee: Korea Institute of Machinery and Materials (Dawonsys Co., Ltd.)
• Inventors: Kim, Young-Kuk, Yoo, Jai-Moo, Chung, Kook-Chae, Ko, Jae-Woong
• Granted Patent: US 7,402,230 B2
• Time in Patent Office: Days
• US Class Current: 428/680
• CPC Class Codes: C25D 1/04 Wires; Strips; Foils
• CPC Class Codes: C25D 5/12 at least one layer being of nickel or chromium
• CPC Class Codes: C25D 5/40 Nickel; Chromium
• CPC Class Codes: C25D 5/617 Crystalline layers
• CPC Class Codes: H01F 10/14 containing iron or nickel H01F10/126 , H01F10/13, H01F10/16 take precedence
• CPC Class Codes: H01F 10/265 Magnetic multilayers non exchange-coupled H01F10/32 takes precedence
• CPC Class Codes: H01F 41/26 using electric currents , e.g. electroplating
• CPC Class Codes: Y10T 428/12944 Ni-base component

Abstract

The present invention is provided to manufacture a low magnetic loss metal tape with biaxial texture and a manufacturing method thereof. The low magnetic loss metal tape has a non-magnetic metal layer deposited on a nickel layer in the form of stack. The low magnetic loss metal tape with biaxial texture is manufactured by the following steps. A biaxially textured nickel layer is formed on a surface of cathode rotating in an electroplating bath including a cathode with single crystalline structure or similary high orientation, and an anode made of high purity nickel. The nickel layer formed on the cathode is then washed in a water bath. Subsequently, a non-magnetic metal layer is formed on the washed nickel layer rotating in a plating bath with a non-magnetic metal solution. The metal tape is finally manufactured by delaminating and winding the nickel/non-magnetic metal layers.

Claims

1. A low magnetic loss metal tape with biaxial texture, wherein a non-magnetic metal layer is deposited onto a nickel layer.

2. The low magnetic loss metal tape with biaxial texture of claim 1, wherein the non-magnetic metal layer deposited onto the nickel layer comprises the metal layers of:

copper (Cu), zinc (Zn), tin (Sn), silver (Ag), gold (Au), manganese (Mn), chromium (Cr), vanadium (V), aluminum (Al), tantalum (Ta), tungsten (W), and a metal alloy composed thereof.

3. The low magnetic loss metal tape with biaxial texture of claim 1, wherein the non-magnetic metal layer is deposited on the nickel layer in the form of single-layer or multi-layer having more than two layers.

4. The low magnetic loss metal tape with biaxial texture of claim 1, wherein the nickel layer and the non-magnetic metal layer are deposited by electroplating.

5. A manufacturing method of low magnetic loss metal tape with biaxial texture comprising the steps of:

(A) forming a nickel layer with biaxial texture on a surface of cathode rotating in an electroplating bath including a cathode with single crystalline or similarly high orientation, and an anode made of high purity nickel;

(B) washing the nickel layer formed on the cathode in a water bath;

(C) forming a non-magnetic metal layer on the washed nickel layer rotating in a plating bath with a non-magnetic metal solution;

(D) winding a metal tape by delaminating the nickel/non-magnetic metal layer.

6. The manufacturing method of low magnetic loss metal tape with biaxial texture of claim 5, wherein the cathode is in cylinder or belt shape and the anode is in curve or plan shape.

7. The manufacturing method of low magnetic loss metal tape with biaxial texture of claim 5, wherein the non-magnetic metal comprises copper (Cu), zinc (Zn), tin (Sn), silver (Ag), gold (Au), manganese (Mn), chromium (Cr), vanadium (V) aluminum (Al), tantalum (Ta), tungsten (W), and a metal alloy composed thereof.

8. The manufacturing method of low magnetic loss metal tape with biaxial texture of claim 5, wherein the step (A) of forming a nickel layer by plating nickel onto the surface of the cathode further includes the pretreatment steps of:

processing the cathode with electrolytic polishing to smoothen the surface of the cathode;

dipping the cathode, at an interval from several seconds to several tenths minutes, in a solution containing one of 0-10 mol hydrochloric acid, 0-10 mol nitric acid, 0-10 mol sulfuric acid, 0-10 mol acetic acid, 0-10 mol chromic acid, 0-10 mol potassium dichromate, 0-10 mol fluoric acid, 0-10 mol lithium hydroxide, 0-10 mol sodium hydroxide, 0-10 mol potassium hydroxide, 0-10 mol ammonia water, 0-10 mol hydrogen peroxide, or a combination of two or more components; and

washing and drying the cathode.

9. The manufacturing method of low magnetic loss metal tape with biaxial texture of claim 5, wherein the plating solution used for the nickel plating in the step (A) includes some or all of 0-600 g/l nickel sulfate, 0-600 g/l nickel sulfamate, 10-70 g/l nickel chloride, 20-80 g/l boric acid, 0-10 g/l sodium tungstate (NaWO₃), or 0-10 g/l cobalt chloride, and the pH range of the plating solution is from 1.5 to 6.