Patents
US 12688873 B1: Heat-assisted magnetic recording heads with additional magnetic material
- Granted
- 2026-07-21
- Filed
- 2025-03-26 application 19091438
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Described are magnetic write heads for heat-assisted magnetic recording (HAMR) in which either or both of the heat sink disk or middle disk of the near field transducer are composed of magnetic materials. In addition, any diffusion barrier layers provided between the write pole and the heat sink or other components may include magnetic materials. Constructing write heads that include magnetic material containing components between the write pole and the near field transducer may result in increased areal density capability (ADC) due to lowering the magnetic field angle, decreasing the magnetic field rise time, and/or increasing the magnetic field strength.
Source: PTBLXML, file of 2026-07-21 (ipgb20260721.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Seagate Technology LLC 4,936 patents | US company or organization | Fremont, CA | PTBLXML, file of 2026-07-21 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Michael Allen Seigler | Eden Prairie, MN | 126 | PTBLXML, file of 2026-07-21 | |
| Weibin Chen | Bloomington, MN | 49 | PTBLXML, file of 2026-07-21 | |
| Jianhua Xue | Maple Grove, MN | 51 | PTBLXML, file of 2026-07-21 | |
| Jie Gong | Eden Prairie, MN | 51 | PTBLXML, file of 2026-07-21 | |
| Joseph Roth | Minneapolis, MN | PTBLXML, file of 2026-07-21 | ||
| Tong Zhao | Eden Prairie, MN | 144 | PTBLXML, file of 2026-07-21 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G11B | Information storage based on relative movement between record carrier and transducer | G11B5/7375 | PTBLXML, file of 2026-07-21 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2026-06-05 | Assignment Assignment of assignor's interest | SEIGLER, MICHAEL ALLEN signed 2025-03-25 CHEN, WEIBIN signed 2025-03-25 XUE, JIANHUA signed 2025-03-25 GONG, JIE signed 2025-03-25 ROTH, JOSEPH signed 2025-03-26 ZHAO, TONG signed 2025-03-25 | SEAGATE TECHNOLOGY LLC FREMONT, CA | 74868/218 | PASDL, file of 2026-10-15 |
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.