US 7,742,258 B2 · Magnetic transducer with milling mask

Abstract

A method for fabricating a magnetic head with a trapezoidal shaped pole piece tip is described. The body of the main pole piece is deposited; then one or more layers for the pole piece tip are deposited. A bed material is deposited over the pole piece tip material. A void is formed in the bed material over the area for the pole piece tip. The void is filled with an ion-milling resistant material such as alumina preferably using atomic layer deposition or atomic layer chemical vapor deposition. The excess ion-milling resistant material and the bed material are removed. The result is an ion-milling mask formed over the area for the pole piece tip. Ion milling is then used to remove the unmasked material in the pole piece tip layer and to form a beveled pole piece tip and preferably a beveled face on the main pole piece.

Claims5

Dependent claims

A magnetic head comprising:

a return pole piece;
a main pole piece;
a pole piece tip connected to the main pole piece and extending toward the return pole piece in a write gap, the pole piece tip having sides that slope inward as viewed from an air-bearing surface and being narrower at a connecting surface with the main pole piece;
and
an ion-milling mask for the pole piece tip in the write gap between the return pole piece and the pole piece tip, a shape of the ion-milling mask as viewed in a first plane perpendicular to the air-bearing surface being coincident with a shape of the pole piece tip as viewed in the first plane perpendicular to the air-bearing surface.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/707,524Filed 12 Feb 2007

Published

US 2007/0139816 A121 Jun 2007

Granted

22 Jun 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

G11B 5/3163
Using thin films: fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating,…
G11B 5/1278
Structure or manufacture of heads, e.g. inductive: specially adapted for magnetisations perpendicular to the surface of the record carrier
G11B 5/3116
Details: shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect,…
Y10T 29/49032
Magnetic recording reproducing transducer [e.g., tape head, core, etc.]: fabricating head structure or component thereof

Magnetic transducer with milling mask

Life of this patent

Magnetic transducer with milling mask

Life of this patent

Abstract

Claims5