Nhk Spring Co., Ltd.

Toshiba Storage Device Corporation

Tsukasa Higashi

Hajime Arai

Hidenori Ogawa

Masao Hanya

Itsuo Takeuchi

Yasuji Takagi

Hideki Kashima

Noriyuki Saito

Osamu Iriuchijima

Takumi Karasawa

Tatsuya Kurihara

Hirofumi Suzuki

Kouichi Toukairin

Ikuo Someya

Osamu Kajitani

Ryuichi Kawatake

A suspension for a disc drive includes a base plate, a load beam, and a flexure. The flexure includes a metal base member and a circuit member disposed along the metal base member. The circuit member extends along the load beam. The circuit member includes a resin base member formed of a first polyimide, conductors, and a resin cover member formed of a second polyimide. The resin cover member is lower than the resin base member in humidity expansion coefficient.

Suspension for disc drive

A suspension for disc drive includes a base plate, a load beam, and a flexure. The flexure includes a metal base member and a circuit member disposed along the metal base member. The circuit member extends in a longitudinal direction of the load beam. The circuit member includes a resin base member formed of an electrically insulating resin and conductors. The conductors are formed into predetermined circuit patterns by etching a deposited copper layer deposited on the resin base member. Each conductor has a cross section in the shape of a trapezoid such that the width of a surface of the conductor which faces the resin base member is greater than that of a surface of the conductor on the side opposite from the resin base member.

A suspension device including a flexure with conductors is provided with an anti-ESD section. The anti-ESD section includes a metal plate, a insulating layer, a first electrically conductive member formed of a pair of read conductors, a second electrically conductive member formed of a pair of write conductors, a heater conductor, semiconductive layers, etc. The semiconductive layers are grounded to the metal plate and electrically isolated from one another by an insulating portion.

Suspension device

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 for a disk drive has a base () to be attached to a carriage, a load beam () having a rigid part () and a resilient part () supported by the base, to apply load on a data read/write head () arranged at a front end () of the rigid part, and a flexure () attached to the load beam and supporting the head. The rigid part has a multilayer structure consisting of at least three layers including metal layers () and a resin layer () interposed between the metal layers. The number of layers of the resilient part is smaller than that of the rigid part.

Head suspension for disk drive and method of manufacturing head suspension

A pulse generating element formed of a switchable magnetic wire is worked so as to have an arcuate shape such that the ratio R/d between the radius of curvature R and diameter d of the wire in a state free from external force ranges from 65 to 95. This is achieved by subjecting a wire of a ferromagnetic material, such as Fe--Co--V, to drawing-bending work. The pulse generating element, which is obtained by cutting the switchable magnetic wire to a predetermined length, is restricted to a substantially straight state by a retaining member, and undergoes a drastic flux reversal when it is subjected to an alternating field.

Growing community of inventors

Yokohama, Japan

Tsukasa Higashi