New high performance parallel bonded fine enamelled wire for hard disk drive head

Data are presented characterizing high-performance parallel bonded fine enamelled wires which have been applied to HDD (hard disk drive) heads. This wire (OFC 2P-UEWB(RG)SL) is shown to be superior in mechanical strength, electrical insulation properties, and high-frequency characteristics to the single wire which has been widely used for HDD heads. This parallel wire has the same clean solderability, chemical resistance, and thermal life as single wire. In addition, the parallel wire has excellent automatic windability, and it has better hand-windability than single wire. Special oxygen-free copper-type parallel bonded wire (AOFC 2P-UEWB(RG)SL) is very suitable for finer size wire.<>