Abstract: A bump of an electrically conductive metal protrudes from an electrode pad of a junction FPC. The bump includes a lead portion that penetrates a conductor pattern and a base layer of the junction FPC and projects on the back side of the base layer. A spare solder layer is formed on the surface of the bump. In soldering the electrode pad of the junction FPC to a connecting pad of a main FPC, the bump and the connecting pad are opposed to each other, and a heat source is pressed against the lead portion of the bump from the side of the base layer of the junction FPC. Heat is transmitted to the spare solder layer through the lead portion and the bump, whereupon the spare solder layer is melted for soldering.

Abstract: In a computer system using either a memory card or a hard-disk drive (HDD) as an external storage device, a slot formed in a computer body for insertion of the external storage device is used commonly for the memory card and HDD. The HDD has an attachment guide member such that the HDD can be detachably mounted in the computer body through the slot. The HDD has a connector having the same specification standard as an interface connector of a memory card. The HDD is connected to the computer body via the connector for transmission of interface signals.

Abstract: A magnetic disk device of the present invention is configured so that a stopper for controlling the movement of a carriage arm is adapted to give rise to play in controlling the carriage arm when the stopper is in the closed state. When a disk rotating means is actuated, the magnetic disk device permits a disk and a magnetic head in the state of fast mutual adhesion to be separated from each other by causing the carriage arm to swing with the stopper kept in the closed state, and consequently, the magnetic disk device enables the disk to rotate without fail.

Abstract: In a magnetic disk drive having a linear-moving type magnetic-head positioning mechanism, a head gap is formed to be parallel to a moving direction of the magnetic-head positioning mechanism, and a magnetic head is mounted on the magnetic-head positioning mechanism through a suspension, so that the longitudinal direction of the magnetic head is perpendicular to the radial direction of a magnetic disk when it is at the inner periphery of the magnetic disk.