Magnetic recording read transducer having a laminated free layer
US-9214169-B1 · Dec 15, 2015 · US
Magnetic head having a magnetoresistive junction and side oxide layers
US9030784B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9030784-B2 |
| Application number | US-201313848353-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 21, 2013 |
| Priority date | Jun 26, 2008 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A magnetic head including a magnetoresistive junction and an oxide layer. The magnetoresistive junction includes a pinned layer, a free layer, and a barrier layer residing between the pinned and free layer. The magnetoresistive junction includes at least one side having a smooth profile. The oxide layer is on the at least one side. The oxide layer is less than one nanometer thick at the free layer.
First claim
Opening claim text (preview).
We claim: 1. A magnetic head comprising: a magnetoresistive junction including a pinned layer, a free layer, and a barrier layer residing between the pinned and free layer, the magnetoresistive junction including at least one side having a smooth profile; and an oxide layer on the at least one side, the oxide layer being less than one nanometer and greater than zero nanometers thick at the free layer; wherein the oxide layer consists of a single natural oxide layer, the single natural oxide layer being a natural oxide of the magnetoresistive junction. 2. The magnetic head of claim 1 wherein the magnetoresistive junction has a track width of not more than sixty nanometers. 3. The magnetic head of claim 2 wherein the track width is not more than fifty nanometers. 4. The magnetic head of claim 1 wherein the at least one side has a junction angle of at least forty and not more than eighty degrees. 5. A disk drive including a magnetic head comprising: a magnetoresistive junction including a pinned layer, a free layer, and a barrier layer residing between the pinned and free layer, the magnetoresistive junction including at least one side having a smooth profile; and an oxide layer on the at least one side, the oxide layer being less than one nanometer and greater than zero nanometers thick at the free layer; wherein the oxide layer consists of a single natural oxide layer, the single natural oxide layer being a natural oxide of the magnetoresistive junction.
Assignees
Inventors
Classifications
with etching or machining of magnetic material · CPC title
- G11B5/3906Primary
Details related to the use of magnetic thin film layers or to their effects · CPC title
- G11B5/3909Primary
Arrangements using a magnetic tunnel junction · CPC title
having tunnel junction effect · CPC title
Specially shaped layers · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9030784B2 cover?
- A magnetic head including a magnetoresistive junction and an oxide layer. The magnetoresistive junction includes a pinned layer, a free layer, and a barrier layer residing between the pinned and free layer. The magnetoresistive junction includes at least one side having a smooth profile. The oxide layer is on the at least one side. The oxide layer is less than one nanometer thick at the free la…
- Who is the assignee on this patent?
- Western Digital Fremont Llc
- 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 12 2015 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).