Sae Magnetics (h.k.) Limited

Headway Technologies, Incorporated

Tdk Corporation

Other

Sae Magnetics (hong Kong) Limited

Sae Magnetic (h.k.), Ltd.

Sae Magnetrics (h.k.) Ltd.

Takehiro Kamigama

Yoshitaka Sasaki

Hiroyuki Itoh

Masashi Shiraishi

Tatsushi Shimizu

Kazuo Ishizaki

Hiroyuki Ito

Shigeki Tanemura

Hironori Araki

Yiu Sing Ho

Jeffery L Wang

Chi Hung Yuen

Kai Wu

Yiusing Ho

Takehiro Horinaka

Liu Jun Zhang

Canhua Chen

Jinsuo Sun

Huegung Wang

Chunkau Leung

Waikong Cheung

Shinji Misawa

Wenxin Chang

Po-Kang Wang

Norikazu Ota

Tetsuro Sasaki

Nobuya Oyama

Soji Koide

Ichiro Yagi

Hong Tian

Cheng Yih Liu

Yi Wan

Masahiko Fujioka

Mike Chang

Hao Qing Pan

Cheng-Teh Wu

Tommy Chan

A thin-film magnetic head including a structure in which a main magnetic pole layer including a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole end part so as to form a recording gap layer on the medium-opposing surface side, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated. The main magnetic pole layer is incorporated in a magnetic pole forming depression of a base insulating layer, the magnetic pole forming depression being sunken into a form corresponding to the main magnetic pole layer. The thin-film magnetic head has a remnant insulating film, formed on the outside of the magnetic pole forming depression so as to substantially surround the magnetic pole forming depression, covering the base insulating layer.

Thin-film magnetic head having remnant coating and remnant insulating film, head gimbal assembly and hard disk drive

A thin-film magnetic head including a main magnetic pole layer having a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium; a write shield layer opposing the magnetic pole end part to form a recording gap layer on the medium-opposing surface side; a thin-film coil wound about the write shield layer or the main magnetic pole layer; and a base insulating layer formed with a magnetic pole forming depression, including a very narrow groove defining a form of the magnetic pole end part and a main depression integrally extending from an end part of the very narrow groove remote from the medium-opposing surface. A stepped part is formed at a boundary between a bottom face of the main depression and a bottom face of the very narrow groove. The main magnetic pole layer is the only magnetically functional layer in the depression.

Thin-film magnetic head structure and thin-film magnetic head

A thin film magnetic head has a configuration in which a main magnetic pole film having a magnetic pole end portion on a medium opposing surface (ABS) side facing a magnetic disk, a write shield film facing the magnetic pole end portion so as to form a recording gap film on the medium opposing surface side, and a thin film coil wound around at least a part of the write shield film are laminated. Further, the thin film magnetic head has an upper yoke magnetic pole film whose size is larger than that of the main magnetic pole film at a part more distant from the ABS than the recording gap film, and this upper yoke magnetic pole film is bonded to the side of the main magnetic pole film close to the thin film coil. In the upper yoke magnetic pole film, an end portion on the ABS side is retracted in a direction apart from the ABS in accordance with an increase in film thickness which is measured from the surface of the main magnetic pole film.

Thin film magnetic head and manufacturing method thereof

A head stack assembly of a disk drive unit includes a head arm assembly (HAA) having a head gimbal assembly, a drive arm to be connected with the head gimbal assembly; wherein the drive arm comprises a securing portion, a connection portion and a spacer connecting the securing portion with the connection portion. At least one undercut is formed on the spacer of the drive arm to strengthen the drive arm.

Head stack assembly with spacers to partition drive arms

A method of manufacturing a thin-film magnetic head structure comprises the steps of preparing an insulating layer; forming a first resist layerprovided with a first slit patterncorresponding to a very narrow groove part and a second slit patterncorresponding to a temporary groove part integrally extending from the very narrow groove part along outer edges of a main depression onto the insulating layer; etching the insulating layerwhile using the first resist layeras a mask; eliminating the first resist layer; forming a second resist layer having an opening pattern corresponding to the main depression onto the insulating layer; and etching the insulating layerwhile using the second resist layer as a mask.

Thin-film magnetic head structure, method of manufacturing the same, and thin-film magnetic head

A system and method for an improved magnetic head arm assembly (HAA) is disclosed. The HAA includes three principal components, a head gimbal assembly (HGA), a flexible printed circuit (FPC) assembly, and an actuator coil assembly. The design allows for HAA rigidity, yet each of the components is designable and manufacturable independent of one another, in addition to other advantages over current methods.

Method for manufacturing a magnetic head arm assembly (HAA)

A thin-film magnetic head is manufactured as follows. First, a base insulating layer having a magnetic pole forming depression sunken into a form corresponding to the main magnetic pole layer is formed, a stop film for CMP is formed such as to fill the magnetic pole forming depression, and then a magnetic layer is formed on the stop film. Next, the magnetic layer is separated by forming a separation groove substantially surrounding the magnetic pole forming depression on the outside thereof, and thus separated magnetic layer is formed with a cover insulating film adapted to cover the whole upper face. The surface is polished by CMP until the stop film is exposed, so that the part of magnetic layer remaining on the inside of the magnetic pole forming depression is used as the main magnetic pole layer. Further, a recording gap layer, a write shield layer, and a thin-film coil are formed.

Method of manufacturing a thin-film magnetic head

A new fixture which is capable of holding an HAS throughout all processes so that Quasi-Static Test can be done before swaging. Also, a process for testing the HAS by means of the fixture. An embodiment method may include loading head gimbal assemblies and an actuator using an automatic loading machine; in-line dressing of the head gimbal assemblies; ultrasonic bonding of the head gimbal assemblies; testing said head gimbal assemblies in-line while quasi-static; and if an head gimbal assemblies fails to pass the testing, rejecting and reworking in-line; in-line coating of the head gimbal assemblies; ultra-violet curing of the head gimbal assemblies; in-line swaging said head gimbal assemblies and actuator to form an head stack assemblies; and visual checking and unloading of said head stack assemblies.

Process for testing a head stack assembly

A system and method are disclosed for improving suspension-to-slider attachment in a hard disk drive. A slider having a number of bond pads on its leading edge and a number of bond pads on its trailing edge is to be coupled to a suspension flexure having a number of leading bond pads and a number of trailing bond pads. The slider is to be coupled to the suspension flexure at the leading bond pads and the trailing bond pads by a method such as gold ball, solder ball, or solder bump bonding.

Method for manufacturing a hard disk drive arm

A wire gap film is formed on a flat coplanar surface formed on a bottom pole by a bottom track pole and a thin film coil, first and second magnetic material films constituting a top pole are formed on a flat surface of the thin film coil, and the first and second magnetic material films, write gap film and bottom track pole are partially removed forming a top track pole and trim structure. The thin film coil is formed by first and second thin film coil halves having self-aligned coil windings and have a CVD formed first conductive film, and an electrolytic plating formed second conductive film. A thin insulating film is interposed between successive coil windings of the first and second thin film coil halves. Jumper wirings, formed with the top pole, connect innermost and outermost coil windings of the first and second thin film coil halves respectively.

Thin film magnetic head

A low profile disk drive unit includes a disk; a HSA cooperating with the disk; a base plate comprising a bottom portion for supporting the disk and the head stack assembly thereon and a base plate sidewall extending from circumference of the bottom portion; and a top cover comprising a top portion and a top cover sidewall extending from circumference of the top portion and assembled with the base plate; wherein the top cover sidewall is thinner than the base plate sidewall, and the base plate sidewall is lower than the disk with the bottom portion as a reference datum so as to define an airflow channel between a periphery of the disk and the top cover sidewall of the top cover.

Low profile disk drive unit

A method of manufacturing a slider includes forming a slider material containing a portion to be the slider body and a head element. The slider material is processed to form an air bearing surface by lapping a surface to be a medium facing surface of the slider material to form a lapped surface that includes a third surface. Selectively etching the lapped surface for form a second surface and after the selectively etching, lapping a part of the lapped surface to form the first surface, the third surface and a border part.

Method of manufacturing slider of thin-film magnetic head

The invention is directed to a method for manufacturing a thin film magnetic head comprising forming a first coil, a first pole piece and a first back gap piece on a first insulating film formed on a surface of a first magnetic film, so that the first coil, the first pole piece and the first back gap piece have a taper angle making a sectional shape wider in a lower part and narrower in an upper part; forming a second insulating film on surfaces of the first coil, the first pole piece and the first back gap piece; forming a first seed film on the second insulating film; growing a first plating film for a second coil on the first seed film in an area where the second coil is to be formed, so that the first plating film fills up spaces between the first pole piece and an outermost coil turn of the first coil, between coil turns of the first coil, and between an innermost coil turn of the first coil and the first back gap piece; and flattening the first plating film by polishing, so that to obtain a pattern of the second coil.

Method of manufacturing a thin film magnetic head

A method of manufacturing a thin-film magnetic head including the step of forming a thin-film coil. The step of forming the thin-film coil forms: a flat first coil of a single turn; a flat second coil of two turns arranged to sandwich the first coil from inner and outer sides thereof; a flat third coil of a single turn located above the first and second coils; and a flat fourth coil of two turns arranged to sandwich the third coil from inner and outer sides thereof. The first and fourth coils are connected in series to constitute a first three-turn coil. The second and third coils are connected in series to constitute a second three-turn coil. The first three-turn coil and the second three-turn coil are connected in series.

Method of manufacturing thin-film magnetic head

Growing community of inventors

Hong Kong, China

Takehiro Kamigama