G11B 5/7368
Non-polymeric layer under the lowermost magnetic recording layer
Official title: {Non-polymeric layer under the lowermost magnetic recording layer (base layers having a non-magnetic layer under a soft magnetic layer G11B5/736; magnetic recording media substrates G11B5/739)}
G11B5/7368 (Non-polymeric layer under the lowermost magnetic recording layer) appears on 1,104 US grants and 953 published applications in this corpus.
Search patents in G11B- Granted patents
- 1,104
- Published applications
- 953
- Assignees
- 192
- Inventors
- 1,572
- Latest grant
- 6 Oct 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 | 3 | 0 |
| 1986 | 7 | 0 |
| 1987 | 14 | 0 |
| 1988 | 9 | 0 |
| 1989 | 10 | 0 |
| 1990 | 6 | 0 |
| 1991 | 12 | 0 |
| 1992 | 14 | 0 |
| 1993 | 7 | 0 |
| 1994 | 17 | 0 |
| 1995 | 18 | 0 |
| 1996 | 14 | 0 |
| 1997 | 24 | 0 |
| 1998 | 45 | 0 |
| 1999 | 35 | 0 |
| 2000 | 43 | 0 |
| 2001 | 31 | 15 |
| 2002 | 30 | 59 |
| 2003 | 47 | 86 |
| 2004 | 89 | 104 |
| 2005 | 58 | 83 |
| 2006 | 50 | 75 |
| 2007 | 47 | 60 |
| 2008 | 34 | 60 |
| 2009 | 45 | 47 |
| 2010 | 36 | 45 |
| 2011 | 42 | 35 |
| 2012 | 18 | 38 |
| 2013 | 28 | 25 |
| 2014 | 39 | 38 |
| 2015 | 41 | 34 |
| 2016 | 36 | 24 |
| 2017 | 21 | 14 |
| 2018 | 18 | 17 |
| 2019 | 19 | 17 |
| 2020 | 23 | 26 |
| 2021 | 17 | 12 |
| 2022 | 18 | 9 |
| 2023 | 12 | 6 |
| 2024 | 8 | 11 |
| 2025 | 9 | 8 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G11B 5/7369Two or more non-magnetic underlayers615
- G11B 5/7379Seed layer305
- G11B 5/7373Non-magnetic single underlayer comprising chromium188
- G11B 5/7377Physical structure of underlayer162
- G11B 5/7371Non-magnetic single underlayer comprising nickel91
- G11B 5/7375For heat-assisted or thermally-assisted magnetic recording [hamr, tamr]79
Recent patents
- High thermal stability lubricants6 Oct 2026US 12,753,360 B2Western Digital Technologies, Inc.
- Near field transducers having magnetic inlays for improved heat-assisted magnetic recording28 Jul 2026US 12,694,897 B1Seagate Technology LLC
- Heat-assisted magnetic recording heads with additional magnetic material21 Jul 2026US 12,688,873 B1Seagate Technology LLC
- Process for forming underlayer for tape media3 Mar 2026US 12,567,442 B2International Business Machines Corporation
- Method for manufacturing magnetic disk, magnetic disk, and magnetic disk precursor27 Jan 2026US 12,537,025 B2Hoya Corporation
- Heat-sink structure in magnetic stack, and related articles, systems, and methods26 Feb 2026US 2026/0057903 A1Seagate Technology LLC
- Production method of magnetic recording medium, and magnetic recording and reproducing device26 Feb 2026US 2026/0057905 A1Resonac Hard Disk Corporation
- Magnetic recording medium and cartridge12 Feb 2026US 2026/0045274 A1Sony Group 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 media with ni-pt seed layer1 Jan 2026US 2026/0004810 A1Western Digital Technologies, Inc.
Most cited
By later US patents
- Magnetic recording medium and method for producing the same168US 5,474,814 AFuji Photo Film Co., Ltd. · 1995
- Ultra-thin nucleation layer for magnetic thin film media and the method for manufacturing the same119US 6,150,015 AKomag, Inc. · 2000
- Composite magnetic recording media113US 9,105,294 B2Sony Corporation · 2015
- Magnetic recording medium comprising a magnetic layer having specific thickness, surface roughness and friction coefficient111US 6,921,592 B2Hitachi Maxell, Ltd. · 2005
- Magnetic recording medium110US 9,542,967 B2Sony Corporation · 2017