G11B 5/3136
For reducing the pole-tip-protrusion at the head transducing surface
Official title: {for reducing the pole-tip-protrusion at the head transducing surface, e.g. caused by thermal expansion of dissimilar materials}
G11B5/3136 (For reducing the pole-tip-protrusion at the head transducing surface) appears on 272 US grants and 244 published applications in this corpus.
Search patents in G11B- Granted patents
- 272
- Published applications
- 244
- Assignees
- 48
- Inventors
- 577
- Latest grant
- 11 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 2 |
| 2003 | 1 | 9 |
| 2004 | 10 | 33 |
| 2005 | 14 | 22 |
| 2006 | 30 | 29 |
| 2007 | 15 | 23 |
| 2008 | 27 | 33 |
| 2009 | 23 | 14 |
| 2010 | 16 | 12 |
| 2011 | 20 | 8 |
| 2012 | 19 | 4 |
| 2013 | 17 | 9 |
| 2014 | 13 | 11 |
| 2015 | 16 | 11 |
| 2016 | 9 | 6 |
| 2017 | 6 | 5 |
| 2018 | 4 | 3 |
| 2019 | 9 | 3 |
| 2020 | 6 | 0 |
| 2021 | 2 | 2 |
| 2022 | 4 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Multi-layer NFT for HAMR with a thermal shunt connecting the metal layers11 Mar 2025US 12,249,355 B1Western Digital Technologies, Inc.
- Heat-assisted magnetic recording head with a resonance enhancing feature11 Mar 2025US 12,249,356 B1Seagate Technology LLC
- Heatsink structures for heat-assisted magnetic recording heads17 Sep 2024US 12,094,491 B2Seagate Technology LLC
- Thermally-assisted magnetic recording (TAMR) head with magnetic assist current11 Jul 2023US 11,699,461 B1Headway Technologies, Inc.
- Heatsink structures for heat-assisted magnetic recording heads27 Dec 2022US 11,538,496 B2Seagate Technology LLC
- Novel DFH Bulge by Heat Sink Design11 Dec 2025US 2025/0378847 A1Headway Technologies, Inc.
- Multi-Layer NFT for HAMR with a Thermal Shunt Connecting the Metal Layers6 Mar 2025US 2025/0078863 A1Western Digital Technologies, Inc.
- Heatsink structures for heat-assisted magnetic recording heads13 Apr 2023US 2023/0110250 A1Seagate Technology LLC
- Magnetic disk device4 Aug 2022US 2022/0246174 A1Kabushiki Kaisha Toshiba
- Heatsink structures for heat-assisted magnetic recording heads25 Nov 2021US 2021/0366515 A1Seagate Technology LLC
Most cited
By later US patents
- Differential head integrated touchdown sensors for hard disk drives207US 7,800,858 B1Western Digital (Fremont), LLC · 2010
- Head integrated touchdown sensor for hard disk drives204US 7,796,356 B1Western Digital (Fremont), LLC · 2010
- Inductive transducer with reduced pole tip protrusion182US 6,751,055 B1Western Digital (Fremont), LLC · 2004
- Submicron track-width pole-tips for electromagnetic transducers179US 7,023,658 B1Western Digital (Fremont), LLC · 2006
- Method and system for providing an energy assisted magnetic recording writer having an integrated NFT, heat sink, and pole168US 8,486,286 B1Western Digital (Fremont), LLC · 2013