Patent ID: 6351351
Filing Date: 2002-02-26
Classification: G11B,H05K

Abstract:
A magnetic head suspension including a distal end portion on which a magnetic head slider can be mounted and a proximal end portion adapted for being supported by an arm, which comprises:a flexure including a plate shaped substrate forming at a distal end position thereof a gimbal portion with a magnetic-head-slider-mounting region, an insulating layer laminated on a magnetic-disk-facing side of said substrate, a conductor layer laminated on said insulating layer for constituting a flexure wiring structure, and an insulative protection layer covering said conductor layer; a plate shaped load beam including a proximal end portion for being supported by said arm for constituting said suspension in cooperation with said flexure; an FPC for connection between said conductor layer of said flexure and an external wiring structure; said FPC including an insulative base layer located on a magnetic-disk-facing side thereof, a conductor layer laminated on a magnetic-disk-facing surface of said insulative base layer, said conductor layer constituting an FPC wiring structure, and an insulative protection layer covering said conductor layer of said FPC; said flexure wiring structure including a terminal pad for connection to said magnetic head slider located closer to a distal end of said flexure, a connection portion for connection to said FPC wiring structure located closer to a proximal end of said flexure and a flexure signal line portion for connection between said terminal pad and said connection portion, said connection portion of said flexure wiring structure having a width substantially equal to that of said flexure signal line portion; said FPC wiring structure including a connection portion for connection to said flexure wiring structure located closer to a distal end of said FPC wiring structure, a terminal pad for connection to said external wiring structure located closer to a proximal end of said FPC wiring structure and an FPC signal line portion for connection between said connection portion and said terminal pad, said FPC signal line portion having a characteristic impedance matching with that of said flexure signal line portion, said connection portion of said FPC wiring structure having a width substantially equal to that of said FPC signal line portion; said connection portion of said flexure wiring structure having a length determined by multiplying a positional error in joining between said flexure and said FPC by two and adding the result to the width of said connection portion of said FPC wiring structure; said connection portion of said FPC wiring structure having a length determined by multiplying said positional error by two and adding the result to the width of said connection portion of said flexure wiring structure; and said connection portion of said flexure wiring structure crossing said connection portion of said FPC wiring structure at right angle and connection thereto.