Printed circuit board, magnetic disk apparatus with the printed

Details Printed circuit board, magnetic disk apparatus with the printed Printed circuit board, magnetic disk apparatus with the printed

1997-09-12

1998-11-17

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 555

Patent

active

058385193

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.

REFERENCES:
patent: 5489804 (1996-02-01), Pasch
patent: 5631786 (1997-05-01), Erpelding
patent: 5644448 (1997-07-01), Suzuki
patent: 5644452 (1997-07-01), Cox et al.
patent: 5668684 (1997-09-01), Palmer et al.
patent: 5678287 (1997-10-01), Smith et al.

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