H01J 2201/30426
Coatings on the emitter surface
Official title: Coatings on the emitter surface, e.g. with low work function materials
H01J2201/30426 (Coatings on the emitter surface) appears on 107 US grants and 42 published applications in this corpus.
Search patents in H01J- Granted patents
- 107
- Published applications
- 42
- Assignees
- 51
- Inventors
- 192
- Latest grant
- 27 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 11 | 0 |
| 1997 | 14 | 0 |
| 1998 | 11 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 2 |
| 2002 | 3 | 1 |
| 2003 | 3 | 0 |
| 2004 | 2 | 5 |
| 2005 | 2 | 3 |
| 2006 | 2 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 1 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 3 | 3 |
| 2019 | 0 | 3 |
| 2020 | 3 | 2 |
| 2021 | 7 | 9 |
| 2022 | 4 | 4 |
| 2023 | 4 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- 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
- Field-emission type electron source and charged particle beam device using the same19 Dec 2023US 11,848,169 B1
- Field emission devices7 Nov 2023US 11,810,774 B2Government of the United States as Represented by the Secretary of the Air Force
- 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
- Emitter for emitting charged particles18 May 2023US 2023/0154725 A1ASML Netherlands B. V.
- Light Modulated Electron Source20 Oct 2022US 2022/0336180 A1KLA Corporation
- Carbon nanomaterial functionalized needle tip modified with low work function material and preparation method thereof29 Sep 2022US 2022/0308087 A1National Center for Nanoscience and Technology
- Electron emitter and method of fabricating same16 Jun 2022US 2022/0189725 A1ASML Netherlands B. V.
Most cited
By later US patents
- Method to form self-aligned gate structures around cold cathode emitter tips using chemical mechanical polishing technology285US 5,229,331 AMicron Technology, Inc. · 1993
- Method to form self-aligned gate structures around cold cathode emitter tips using chemical mechanical polishing technology146US 5,372,973 AMicron Technology, Inc. · 1994
- Diode structure flat panel display100US 5,449,970 AMicroelectronics and Computer Technology Corporation · 1995
- Method for formation of a trench accessible cold-cathode field emission device89US 5,374,868 AMicron Display Technology, Inc. · 1994
- Field emission cathode and a device based thereon87US 5,825,122 A1998