Thin-film magnetic head, method of manufacturing the same, head gimbal assembly, and hard disk drive

A method of manufacturing a thin-film magnetic head constructed such that a main magnetic pole layer having a magnetic pole end face on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the main magnetic pole layer on the medium-opposing surface side, a gap layer formed between the main magnetic pole layer and write shield layer, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated on a substrate;

• the method comprising the steps of:
• forming a first conductor layer constituting the thin-film coil on a surface of a multilayer body and then forming an interlayer insulating layer on the first conductor layer;
• and
• forming a second conductor layer constituting the thin-film coil on the interlayer insulating layer at a position separated from the medium-opposing surface equidistantly as the first conductor layer.

A head gimbal assembly comprising a thin-film magnetic head formed on a support and a gimbal for securing the support;

• wherein the thin-film magnetic head is constructed such that a main magnetic pole layer having a magnetic pole end face on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the main magnetic pole layer on the medium-opposing surface side, a gap layer formed between the main magnetic pole layer and write shield layer, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated on a substrate;
• wherein the thin-film coil has first and second conductor layers including turn parts arranged at a position separated from the medium-opposing surface;
• and
• wherein the thin-film magnetic head has an equidistant two-stage structure where a first turn part of the first conductor layer and a second turn part of the second conductor layer overlap vertically along the medium-opposing surface while having the same front distance from respective front side faces closer to the medium-opposing surface to the medium-opposing surface.

A hard disk drive comprising a head gimbal assembly having a thin-film magnetic head and a recording medium opposing the thin-film magnetic head;

• wherein the thin-film magnetic head is constructed such that a main magnetic pole layer having a magnetic pole end face on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the main magnetic pole layer on the medium-opposing surface side, a gap layer formed between the main magnetic pole layer and write shield layer, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated on a substrate;
• wherein the thin-film coil has first and second conductor layers including turn parts arranged at a position separated from the medium-opposing surface;
• and
• wherein the thin-film magnetic head has an equidistant two-stage structure where a first turn part of the first conductor layer and a second turn part of the second conductor layer overlap vertically along the medium-opposing surface while having the same front distance from respective front side faces closer to the medium-opposing surface to the medium-opposing surface.