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Chemical Nickel Iron Copper Boron Films

IP.com Disclosure Number: IPCOM000092822D
Original Publication Date: 1967-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Koretzky, H: AUTHOR [+2]

Abstract

Well-oriented 1000 Angstroms thick magnetic films can be deposited from a bath containing nickelous, ferrous, cuprous ions, and suitable complexing, alkalizing and reducing agents. A preferred reducing agent is dimethylamine borane or similar boranes. The deposition can be carried out at room temperature and at elevated temperatures up to 100 degrees C.

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Chemical Nickel Iron Copper Boron Films

Well-oriented 1000 Angstroms thick magnetic films can be deposited from a bath containing nickelous, ferrous, cuprous ions, and suitable complexing, alkalizing and reducing agents. A preferred reducing agent is dimethylamine borane or similar boranes. The deposition can be carried out at room temperature and at elevated temperatures up to 100 degrees C.

For example, a copper sheet 3"x3" is activated by dipping for 5 seconds at room temperature in a 0.1% palladium chloride solution. After rinsing it is immersed in a bath containing: 62 millimols/liter dimethylamine borane

56.2 millimols/liter nickelous chloride

3.0 millimols/liter ferrous ammonium sulfate

0.3 millimols/liter cuprous chloride

115 millimols/liter sodium potassium tartrate

200 millimols/liter ammonium chloride

1200 millimols/liter ammonia.

After plating at 25 degrees C for 25 minutes, a film of 1000 angstroms thickness is formed, having a coercive force of about 15 oe, an anisotropy field of about 15 oe, and at 30 Kc an almost square 13-H loop in the easy direction and an almost closed B-H loop in the hard direction.

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