ELECTROCRYSTALLIZATION PLATING BATH FOR FORMING MAGNETIC FILM, AND ELECTROCRYSTALLIZATION PLATING METHOD USING THE SAME

• Main Authors: HOSOIRI KAORI, O MINE, SONE TAKAYUKI, KUZUSHIMA TOSHIO, WATANABE TORU, DOI SAYAKA
• Format: Patent
• Language: English
• Published: 18.11.2004
• Edition: 7
• Subjects: APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; INDUCTANCES; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; MAGNETS; METALLURGY; PHYSICS; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

PROBLEM TO BE SOLVED: To provide an electrocrystallization plating liquid for forming an Fe-Pt alloy magnetic film and an Fe-Pd alloy magnetic film as a new electrocrystallization plating bath for diversifying the magnetic film composing a magnetic recording medium and forming the magnetic film at a large scale and low cost. SOLUTION: The electrocrystallization plating bath for forming a magnetic film of an iron-platinum alloy comprises: 1 to 50 g/L iron sulfate heptahydrate; 2 to 60 g/L chloroplatinic acid (IV); 0.5 to 50 g/L ammonium tartrate; and 5 to 250 g/L ammonia. The electrocrystallization plating bath for forming a magnetic film of an iron-palladium alloy comprises: 1 to 50 g/L iron sulfate heptahydrate; 0.2 to 50 g/L palladium chloride; 0.5 to 70 g/L ammonium tartrate; 0.5 to 30 g/L ammonium chloride; and 0.1 to 10 g/L cresolsulfonic acid. COPYRIGHT: (C)2005,JPO&NCIPI