US 2018/0082714 A1 · SELECTABLE WRITERS FOR REDUCED PERFORMANCE VARIANCE, AND SELECTION METHOD THEREOF

Abstract

A method of forming a recording head for use with a data storage medium in a data storage device. The method includes forming first and second writers of different target geometries. A first recording measurement is performed on one or more storage media using the first writer. A second recording measurement is performed on the one or more storage media using the second writer. Based on a comparison of the first and second recording measurements to a predetermined quantity, either the first writer or the second writer is selected to be operational in the data storage device.

Claims20

Dependent claims

A data storage device comprising:

one or more data storage media;
and
at least one recording head having substantially coplanar first and second writers of different geometries, wherein only one of the first or the second writer is configured to be operational to record user data on the one or more data storage media.

Dependencies are inferred from the claim text.

Facts

Application

15/813,374Filed 15 Nov 2017

Priority

11 Dec 2015

Published

22 Mar 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

G11B 5/1272
Structure or manufacture of heads, e.g. inductive: assembling or shaping of elements
G11B 5/012
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor: recording on, or…
G11B 5/1278
Structure or manufacture of heads, e.g. inductive: specially adapted for magnetisations perpendicular to the surface of the record carrier
G11B 5/265
Structure or manufacture of heads, e.g. inductive: structure or manufacture of a head with more than one gap for erasing, recording or reproducing…

Family

Application62/266,431Us provisional application · filed 11 Dec 2015

Application14/996,833Division · filed 15 Jan 2016

Application15/813,374Division

US 10,255,933 B2Related patent

US 10,325,619 B2Related patent

US 9,865,301 B1Related patent

US 2018/0082714 A1This patent

From the US filing history. Foreign family members aren’t listed.

Selectable writers for reduced performance variance, and selection method thereof

Life of this patent

Selectable writers for reduced performance variance, and selection method thereof

Life of this patent

Abstract

Claims20