Patents
US 9431037 B2: Systems and methods for monitoring the power of a light source utilized in energy-assisted magnetic recording
- Granted
- 2016-08-30
- Filed
- 2013-03-12 application 13797266
- Type
- Utility · 63 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Aspects of the present invention relate to energy-assisted magnetic recording (EAMR), an EAMR assembly, and methods for fabricating the same. In several embodiments, an EAMR head includes a sub-mount on a slider that has a waveguide configured to receive light from a light source attached to a surface of the sub-mount. The waveguide receives the light at a top surface of the slider and routes the light to be near an air bearing surface (ABS) of the slider where energy of the light can be used to heat up a spot on a recording media disk that is proximate the ABS. The waveguide also routes a portion of the light back to the top surface of the slider where the light exits the waveguide and is detected by a light detector located along the surface of the sub-mount.
Source: PVGPATDIS, file of 2026-04-10 (ipg160830.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| WESTERN DIGITAL (FREMONT), LLC 551 patents | US company or organization | Fremont, CA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| William J. Kozlovsky | Sunnyvale, CA | 15 | PVGPATDIS, file of 2026-04-10 | |
| Lei Wang | Fremont, CA | 856 | PVGPATDIS, file of 2026-04-10 | |
| Arkadi Goulakov | Fremont, CA | 9 | PVGPATDIS, file of 2026-04-10 | |
| Khiem Ba Do | Portola Valley, CA | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G11B | Information storage based on relative movement between record carrier and transducer | G11B5/314 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T29/49032 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2023-08-21 | Other Patent collateral agreement - ddtl loan agreement | WESTERN DIGITAL TECHNOLOGIES, INC. signed 2023-08-18 | JPMORGAN CHASE BANK, N.A. CHICAGO, IL | 67045/156 | PASDL, file of 2026-10-15 |
| 2023-08-21 | Other Patent collateral agreement - a&r loan agreement | WESTERN DIGITAL TECHNOLOGIES, INC. signed 2023-08-18 | JPMORGAN CHASE BANK, N.A. CHICAGO, IL | 64715/1 | PASDL, file of 2026-10-15 |
| 2022-02-08 | Release of security interest Release of security interest at reel 038710 frame 0845 | JPMORGAN CHASE BANK, N.A. signed 2022-02-03 | WESTERN DIGITAL (FREMONT), LLC IRVINE, CA WESTERN DIGITAL TECHNOLOGIES, INC. IRVINE, CA | 58965/445 | PASDL, file of 2026-10-15 |
| 2019-09-19 | Assignment Assignment of assignor's interest | WESTERN DIGITAL (FREMONT), LLC signed 2019-05-08 | WESTERN DIGITAL TECHNOLOGIES, INC. SAN JOSE, CA | 50450/582 | PASDL, file of 2026-10-15 |
| 2018-03-05 | Release of security interest Release of security interest | U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT signed 2018-02-27 | WESTERN DIGITAL (FREMONT), LLC SAN JOSE, CA | 45501/158 | PASDL, file of 2026-10-15 |
| 2016-05-16 | Security interest Security interest Security agreement | WESTERN DIGITAL (FREMONT), LLC signed 2016-05-12 | JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT CHICAGO, IL | 38744/755 | PASDL, file of 2026-10-15 |
| 2016-05-16 | Security interest Security interest Security agreement | WESTERN DIGITAL (FREMONT), LLC signed 2016-05-12 | U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT LOS ANGELES, CA | 38744/675 | PASDL, file of 2026-10-15 |
| 2016-05-16 | Security interest Security interest Security agreement | WESTERN DIGITAL (FREMONT), LLC signed 2016-05-12 | JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT CHICAGO, IL | 38710/845 | PASDL, file of 2026-10-15 |
| 2014-05-27 | Assignment Assignment of assignor's interest | DO, KHIEM BA signed 2013-03-08 GOULAKOV, ARKADI B. signed 2013-03-08 KOZLOVSKY, WILLIAM J. signed 2013-03-08 WANG, LEI signed 2013-03-12 | WESTERN DIGITAL (FREMONT), LLC FREMONT, CA | 32970/110 | ECORSEXC, file of 2026-09-25 |
| 2014-05-14 | Assignment Assignment of assignor's interest | GOULAKOV, ARKADI B. signed 2013-03-08 KOZLOVSKY, WILLIAM J. signed 2013-03-08 WANG, LEI signed 2013-03-08 | WESTERN DIGITAL (FREMONT), LLC FREMONT, CA | 32890/144 | ECORSEXC, file of 2026-09-25 |
| 2014-03-05 | Assignment Assignment of assignor's interest | DO, KHIEM BA signed 2013-03-08 GOULAKOV, ARKADI B. signed 2013-03-08 KOZLOVSKY, WILLIAM J. signed 2013-03-08 WANG, LEI signed 2013-03-12 | WESTERN DIGITAL (FREMONT), LLC FREMONT, CA | 32359/899 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.