H01J 2201/30407
Microengineered point emitters
H01J2201/30407 (Microengineered point emitters) appears on 96 US grants and 84 published applications in this corpus.
Search patents in H01J- Granted patents
- 96
- Published applications
- 84
- Assignees
- 70
- Inventors
- 224
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 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 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 2 |
| 2002 | 2 | 2 |
| 2003 | 3 | 3 |
| 2004 | 3 | 1 |
| 2005 | 1 | 3 |
| 2006 | 2 | 6 |
| 2007 | 6 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 5 |
| 2010 | 3 | 3 |
| 2011 | 3 | 4 |
| 2012 | 4 | 2 |
| 2013 | 0 | 6 |
| 2014 | 3 | 4 |
| 2015 | 5 | 3 |
| 2016 | 3 | 5 |
| 2017 | 9 | 6 |
| 2018 | 6 | 2 |
| 2019 | 3 | 8 |
| 2020 | 6 | 3 |
| 2021 | 4 | 2 |
| 2022 | 0 | 4 |
| 2023 | 3 | 3 |
| 2024 | 4 | 1 |
| 2025 | 3 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Extreme-ultraviolet light source device using electron beams21 Oct 2025US 12,451,316 B2Worldbeam Solution Co., Ltd.
- Field emission electron source, electron optical device, and manufacturing method26 Aug 2025US 12,400,820 B2Hitachi, Ltd.
- Carbon nanomaterial functionalized needle tip modified with low work function material and preparation method thereof27 May 2025US 12,313,653 B2National Center for Nanoscience and Technology
- Emitter, electron gun in which same is used, electronic device in which same is used, and method for manufacturing same14 May 2024US 11,984,294 B2National Institute for Materials Science
- Field-emission type electron source and charged particle beam device using the same19 Mar 2024US 11,935,720 B1
- Backend field emission devices19 Mar 2026US 2026/0081089 A1
- Emitter, electron gun and electronic apparatus, and emitter manufacturing method4 Dec 2025US 2025/0372334 A1
- Package having field emission element and x-ray device having the same28 Aug 2025US 2025/0275297 A1LG Electronics Inc.
- Field Emission Electron Source, Electron Optical Device, and Manufacturing Method29 May 2025US 2025/0174422 A1Hitachi, Ltd.
- Emitter, electron gun in which same is used, electronic device in which same is used, and method for manufacturing same7 Mar 2024US 2024/0079198 A1National Institute for Materials Science
Most cited
By later US patents
- Field emission structures produced on macro-grain polysilicon substrates95US 5,329,207 AMicron Technology, Inc. · 1994
- Method of making field emission tips using physical vapor deposition of random nuclei as etch mask92US 5,399,238 AMicroelectronics and Computer Technology Corporation · 1995
- Method of forming etch mask using particle beam deposition70US 5,382,315 AMicroelectronics and Computer Technology Corporation · 1995
- Method of making a field emitter device using randomly located nuclei as an etch mask69US 5,312,514 AMicroelectronics and Computer Technology Corporation · 1994
- Band for anchoring a catheter or other device to the body53US 4,445,894 ABaka Manufacturing Company, Inc. · 1984