Nhk Spring Co., Ltd.

Ikuo Someya

Hajime Arai

Ichiro Takadera

Tsukasa Higashi

Ryuichi Kawatake

A head suspension prevents a read element from electrostatic discharge damage without employing a static electricity remover or without increasing the number of manufacturing processes. The head suspension has a load beam to apply load to a head that writes and reads data to and from a hard disk, a flexure made of a conductive thin substrate attached to the load beam and supporting the head, an insulating base layer made of flexible resin and formed on the substrate of the flexure, write wires and read wires connected to the head and formed on the insulating base layer, and an insulating cover layer covering the write and read wires on the insulating base layer. The insulating cover layer is made of slightly conductive flexible resin.

Head suspension having wiring disposed in contact with slightly conductive flexible resin

A head suspension prevents a read element from electrostatic discharge damage without employing a static electricity remover, and at the same time, secures the frequency characteristics of a write signal. The head suspension has a load beam to apply load to a slider that writes and reads data to and from a hard disk, a flexture made of a conductive thin plate attached to the load beam, to support the slider, write wires connected to the slider and formed on an insulating base layer that is made of flexible resin and is formed on the flexure, and coating made of conductive flexible resin to discharge static electricity. The coating is formed over the read wires and is extended to the surface of the flexure.

Head suspension having wiring disposed with conductive layer

A wiring portion has first and second write conductors, first and second read conductors, and an insulating layer. The first write conductor, first and second read conductors, and second write conductor are arranged three-dimensionally at different height levels in the thickness direction of the insulating layer, in a cross section extending in the width direction of the wiring portion. The distance from the first write conductor to the first read conductor is equal to the distance from the first write conductor to the second read conductor. The distance from the second write conductor to the first read conductor is equal to the distance from the second write conductor to the second read conductor.

Disc drive suspension including a wired flexure with conductors arranged to reduce crosstalk

A wired flexure comprises a metallic substrate, a polyimide layer formed on the metallic substrate, and read conductors and write conductors formed on the polyimide layer. The polyimide layer has a thick-walled portion and a thin-walled portion that are different in thickness. The read and write conductors extend covering the thick- and thin-walled portions. In order to obtain a desired impedance, the width of the conductors in the thin-walled portion is smaller than that of the conductors in the thick-walled portion.

Wiring member of a disc drive suspension having an insulating layer with thick-walled and thin-walled portions

A wired flexure comprises a substrate formed of an electrically conductive material, a read wire provided on the substrate so as to extend along the substrate, a write wire provided on the substrate so as to extend along the read wire, a slit formed between the read and write wires, etc. The slit extends along the read and write wires and divides the substrate between a first portion on the read wire side and a second portion on the write wire side. The slit is situated nearer to the read wire than to the write wire.

Growing community of inventors

Sagamihara, Japan

Ikuo Someya