G11B 5/7369
Two or more non-magnetic underlayers
Official title: {Two or more non-magnetic underlayers, e.g. seed layers or barrier layers}
G11B5/7369 (Two or more non-magnetic underlayers) appears on 615 US grants and 564 published applications in this corpus.
Search patents in G11B- Granted patents
- 615
- Published applications
- 564
- Assignees
- 117
- Inventors
- 899
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 9 | 0 |
| 1996 | 7 | 0 |
| 1997 | 11 | 0 |
| 1998 | 26 | 0 |
| 1999 | 18 | 0 |
| 2000 | 23 | 0 |
| 2001 | 18 | 10 |
| 2002 | 19 | 39 |
| 2003 | 33 | 51 |
| 2004 | 55 | 49 |
| 2005 | 33 | 52 |
| 2006 | 26 | 43 |
| 2007 | 31 | 34 |
| 2008 | 16 | 39 |
| 2009 | 26 | 27 |
| 2010 | 18 | 28 |
| 2011 | 20 | 18 |
| 2012 | 15 | 33 |
| 2013 | 21 | 14 |
| 2014 | 25 | 21 |
| 2015 | 26 | 26 |
| 2016 | 26 | 12 |
| 2017 | 16 | 7 |
| 2018 | 13 | 14 |
| 2019 | 12 | 11 |
| 2020 | 12 | 7 |
| 2021 | 7 | 6 |
| 2022 | 10 | 3 |
| 2023 | 4 | 4 |
| 2024 | 5 | 10 |
| 2025 | 5 | 4 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for manufacturing magnetic disk, magnetic disk, and magnetic disk precursor27 Jan 2026US 12,537,025 B2Hoya Corporation
- Magnetic tape having characterized dark regions on magnetic layer, magnetic tape cartridge, and magnetic tape apparatus23 Sep 2025US 12,424,244 B2FUJIFILM Corporation
- Magnetic tape having characterized bright regions on magnetic layer, magnetic tape cartridge, and magnetic tape apparatus23 Sep 2025US 12,424,245 B2FUJIFILM Corporation
- Media underlayer structure for heat-assisted magnetic recording and media fabrication methods therefor9 Sep 2025US 12,412,598 B2Western Digital Technologies, Inc.
- Magnetic recording medium with magnesium-titanium oxide (MTO) layer formed using pulsed direct current sputter deposition20 May 2025US 12,308,056 B2Western Digital Technologies, Inc.
- Production method of magnetic recording medium, and magnetic recording and reproducing device26 Feb 2026US 2026/0057905 A1Resonac Hard Disk Corporation
- Magnetic recording media with small recording grain sizes, high aspect ratio, and methods of fabricating same1 Jan 2026US 2026/0004809 A1Western Digital Technologies, Inc.
- Magnetic recording medium, and magnetic recording and reproducing device25 Dec 2025US 2025/0391436 A1Resonac Hard Disk Corporation
- Magnetic recording apparatus with heat-assisted read process27 Nov 2025US 2025/0364009 A1Western Digital Technologies, Inc.
- Magnetic recording medium with magnesium-titanium oxide (mto) layer formed using pulsed direct current sputter deposition17 Apr 2025US 2025/0124951 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Magnetic recording medium110US 9,542,967 B2Sony Corporation · 2017
- Perpendicular magnetic recording medium with an ordering temperature reducing layer89US 8,173,282 B1WD Media, LLC · 2012
- Method of making high performance, low noise isotropic magnetic media including a chromium underlayer84US 6,156,404 AKomag, Inc. · 2000
- Patterned medium and recording head83US 7,019,924 B2Komag, Inc. · 2006
- Antiferromagnetically coupled magnetic recording medium with dual-layered upper magnetic layer79US 6,759,138 B2Hoya Corporation · 2004