摘要:
A magnetic head for reading from and/or writing to a magnetic information storage medium, has a substrate (21) on which a plurality of thin films are formed in sequence. The films provide a magnetic circuit having a magnetic gap (25), a bottom pole piece (22) and a top pole piece (12,15) overlying said bottom pole piece. The top pole piece is formed as a tip portion (12) adjoining the magnetic gap and a rear portion (15) which makes magnetic contact with the tip portion (12). The rear portion (15) is formed in the sequence after the tip portion (12). To ensure accurate thickness and width of the tip portion (12), there is a non-magnetic protective film (13) on the tip portion (12) formed in the sequence after the tip portion (12) and before the rear portion (15).
摘要:
A magnetic disk drive that shape coefficient is 3.5 inches are provided, which is designed as rotating magnetic media in a high speed in order to consume a low electric power, to generate a less heat, and to access more quickly. When magnetic disk media are rotated in a higher speed, an electric power consumption and a heat generation are increased because of a load increase in rotating the magnetic disk media. An avoidance of such problems and setting an additional special cooling mechanism to magnetic disk drive systems, for example, disk array systems, is presented. A housing 11 of magnetic disk drive in a shape coefficient 3.5 inches mounts magnetic disk media 21 for a magnetic disk drive in a shape coefficient 2.5 inches, which aims a lightweighting of a rotational spindle portion, a decrease of a torque loss during on-load rotation with the media, and a decrease of a electric current into a spindle motor 41 during rotation. Further, fins 11a for heat radiation may be arranged around the housing 11, which results in avoidance or decrease raising a temperature in the housing 11.
摘要:
A magnetic head for reading from and/or writing to a magnetic information storage medium, has a substrate (21) on which a plurality of thin films are formed in sequence. The films provide a magnetic circuit having a magnetic gap (25), a bottom pole piece (22) and a top pole piece (12,15) overlying said bottom pole piece. The top pole piece is formed as a tip portion (12) adjoining the magnetic gap and a rear portion (15) which makes magnetic contact with the tip portion (12). The rear portion (15) is formed in the sequence after the tip portion (12). To ensure accurate thickness and width of the tip portion (12), there is a non-magnetic protective film (13) on the tip portion (12) formed in the sequence after the tip portion (12) and before the rear portion (15).