Magnetic recording read transducer having a laminated free layer
US-9214169-B1 · Dec 15, 2015 · US
Higher stability read head utilizing a partial milling process
US9349397B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9349397-B2 |
| Application number | US-201414226673-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 26, 2014 |
| Priority date | Mar 26, 2014 |
| Publication date | May 24, 2016 |
| Grant date | May 24, 2016 |
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Abstract
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In one embodiment, a method for forming a magnetoresistive read head includes forming a fixed layer having a first ferromagnetic material that has a fixed direction of magnetization above a lower shield layer, forming a free layer having a second ferromagnetic material positioned above the fixed layer, the free layer having a non-fixed direction of magnetization, forming a first mask above the free layer, the first mask having a predetermined width based on a track width of a magnetic medium, etching the free layer down to the fixed layer using the first mask as a guide, wherein substantially none of the fixed layer is etched, and wherein the fixed layer extends beyond both sides of the free layer in a cross-track direction, and forming magnetic domain control films on both sides of the free layer in the cross-track direction, the magnetic domain control films including a soft magnetic material.
First claim
Opening claim text (preview).
What is claimed is: 1. A magnetoresistive (MR) read head, comprising: a fixed layer comprising a first ferromagnetic material that has a direction of magnetization that is fixed; a free layer comprising a second ferromagnetic material positioned above the fixed layer, the free layer having a direction of magnetization that is not fixed, wherein the fixed layer extends beyond both sides of the free layer in a cross-track direction, and wherein the fixed layer extends beyond a bac…
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Cross-Sectional Technologies · mapped topic
- G11B5/3906Primary
Physics · mapped topic
Cross-Sectional Technologies · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9349397B2 cover?
- In one embodiment, a method for forming a magnetoresistive read head includes forming a fixed layer having a first ferromagnetic material that has a fixed direction of magnetization above a lower shield layer, forming a free layer having a second ferromagnetic material positioned above the fixed layer, the free layer having a non-fixed direction of magnetization, forming a first mask above the …
- Who is the assignee on this patent?
- HGST Netherlands BV
- What technology area does this patent fall under?
- Primary CPC classification G11B5/3906. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 24 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).