| Patent application number | Description | Published |
|---|
| 20100302681 | Perpendicular magnetic recording head and method of manufacturing the same - A method of manufacturing a perpendicular magnetic write head capable of precisely narrowing a side gap is provided. A tip portion having a cross sectional geometry of an inverted trapezoid is formed in an opening portion of a non-magnetic layer and thereafter, the non-magnetic layer is etched with the tip portion as a mask. Thereby, a portion adjacent to the tip portion in a writing track width direction remains and an outermost edge portion of the tip portion in that direction is located on a plane which coincides with an etching face (side face) of the non-magnetic layer. When a gap layer is formed with a vapor phase growth such as a sputtering method to cover the side face of the non-magnetic layer and thereafter a side shield layer is formed adjacently to the tip portion therethrough, a thickness of the gap layer becomes extremely thin and is reproduced precisely. Therefore, the side gap is narrowed with high precision. | 12-02-2010 |
| 20100315741 | Perpendicular magnetic recording head - A perpendicular magnetic write head capable of suppressing damage and corrosion of a magnetic pole to secure a stable writing performance is provided. | 12-16-2010 |
| 20110063754 | Perpendicular magnetic write head - A perpendicular magnetic write head in which unintended erasure of information at the time of non-writing can be suppressed while keeping the capability of writing is provided. The perpendicular magnetic write head includes a magnetic pole tip portion, a first yoke portion connected to the magnetic pole tip portion, having a width larger than that of the magnetic pole tip portion, and having a recess portion in a center region thereof, and a second yoke portion embedded in the recess portion. The magnetic pole tip portion and the first yoke portion are integrally formed with a vapor deposition method, and the second yoke portion is formed with a plating method. Since the saturation flux density of the magnetic pole tip portion formed with the vapor deposition method becomes higher than that of the yoke portion, a magnetic flux intake capacity of the magnetic pole tip portion is ensured. In a magnetic domain structure of the yoke portion most of which is formed with the plating method, since an easy magnetization axis becomes likely to be directed in a direction perpendicular to an emitting direction of a magnetic flux, residual flux becomes less likely to leak out of the main magnetic pole layer at the time of non-writing. | 03-17-2011 |
| 20110220611 | Method of manufacturing perpendicular magnetic write head - A method of manufacturing a perpendicular magnetic recording head capable of easily and accurately forming a main magnetic-pole layer having a shape suitable for concentrating a magnetic flux is provided. A nonmagnetic layer having a recessed section (a first recessed section and a second recessed section) is formed, and then an additional nonmagnetic layer is formed on an inner surface of the recessed section. Then, a magnetic layer is formed in the recessed section formed with the additional nonmagnetic layer, and then the magnetic layer is cut to form an air bearing surface, so as to form the main magnetic-pole layer. | 09-15-2011 |
