G11B 5/676
Having magnetic layers separated by a nonmagnetic layer
Official title: {having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer}
G11B5/676 (Having magnetic layers separated by a nonmagnetic layer) appears on 516 US grants and 535 published applications in this corpus.
Search patents in G11B- Granted patents
- 516
- Published applications
- 535
- Assignees
- 114
- Inventors
- 796
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 14 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 9 |
| 2002 | 13 | 33 |
| 2003 | 30 | 43 |
| 2004 | 41 | 43 |
| 2005 | 34 | 57 |
| 2006 | 30 | 49 |
| 2007 | 26 | 39 |
| 2008 | 19 | 40 |
| 2009 | 34 | 47 |
| 2010 | 25 | 38 |
| 2011 | 35 | 23 |
| 2012 | 21 | 28 |
| 2013 | 25 | 17 |
| 2014 | 27 | 14 |
| 2015 | 30 | 16 |
| 2016 | 16 | 10 |
| 2017 | 16 | 6 |
| 2018 | 9 | 6 |
| 2019 | 2 | 1 |
| 2020 | 3 | 4 |
| 2021 | 3 | 3 |
| 2022 | 3 | 0 |
| 2023 | 3 | 3 |
| 2024 | 2 | 1 |
| 2025 | 2 | 1 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Magnetic stack, and related data storage devices, systems, and methods23 Dec 2025US 12,505,855 B1Seagate Technology LLC
- Magnetic recording medium with varying composition ratio and magnetic recording device21 Oct 2025US 12,451,159 B2Kabushiki Kaisha Toshiba
- Magnetic recording medium, magnetic tape cartridge, and magnetic recording and reproducing device3 Dec 2024US 12,159,656 B2FUJIFILM Corporation
- Magnetic recording medium having characterized magnetic layer, magnetic tape cartridge, and magnetic recording and reproducing device3 Dec 2024US 12,159,657 B2FUJIFILM Corporation
- Heat assisted magnetic recording media with amorphous magnetic grain boundary material22 Aug 2023US 11,735,217 B2Western Digital Technologies, Inc.
- Non-aligned exchange-de-coupled dual-layer system for increased areal-density8 Oct 2026US 2026/0311723 A1Seagate Technology LLC
- Magnetic recording and reproducing apparatus1 Oct 2026US 2026/0301767 A1Resonac Hard Disk Corporation
- Magnetic recording medium, method of manufacturing magnetic recording medium, and magnetic storage device7 May 2026US 2026/0128061 A1Resonac Hard Disk Corporation
- Magnetic stack, and related data storage devices, systems, and methods19 Mar 2026US 2026/0080897 A1Seagate Technology LLC
- Magnetic stack, and related data storage devices, systems, and methods25 Dec 2025US 2025/0391429 A1Seagate Technology LLC
Most cited
By later US patents
- Magnetic recording media and magnetic recording read-back system which uses such media113US 5,851,643 AHitachi, Ltd. · 1998
- Magnetic recording media with antiferromagnetically coupled ferromagnetic films as the recording layer110US 6,280,813 B1International Business Machines Corporation · 2001
- Magnetic recording medium110US 9,542,967 B2Sony Corporation · 2017
- Magnetic recording disk with composite perpendicular recording layer99US 6,468,670 B1International Business Machines Corporation · 2002
- Magnetic media with improved exchange coupling82US 7,070,870 B2Komag, Inc. · 2006