Differential suspended single-layer graphene nanopore sensor, and preparation method therefor and use thereof
US-2024204190-A1 · Jun 20, 2024 · US
Wet etching
Wet etching · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B81C1/00539 |
| Official title | {Wet etching} |
| Display label | Wet etching |
| Total patents | 190 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 26 |
| 2016 | 21 |
| 2017 | 15 |
| 2018 | 18 |
| 2019 | 17 |
| 2020 | 23 |
| 2021 | 26 |
| 2022 | 10 |
| 2023 | 15 |
| 2024 | 12 |
| 2025 | 6 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Field Emission Devices and Methods of Making Thereof
US-2017365507-A1 · Dec 21, 2017 · US
Composition and process for selectively etching metal nitrides
US-9831088-B2 · Nov 28, 2017 · US
Membrane structures for microelectromechanical pixel and display devices and systems, and methods for forming membrane structures and related devices
US-9798132-B2 · Oct 24, 2017 · US
Field emission devices and methods of making thereof
US-9711392-B2 · Jul 18, 2017 · US
Nanostructures fabricated by metal asisted chemical etching for antibacterial applications
US-2017174848-A1 · Jun 22, 2017 · US
Method for fabricating suspended MEMS structures
US-9656859-B2 · May 23, 2017 · US
Vibration device including support portion
US-9650238-B2 · May 16, 2017 · US
Compact fluid analysis device and method to fabricate
US-9617149-B2 · Apr 11, 2017 · US
Microelectronic interconnect element with decreased conductor spacing
US-2017096329-A1 · Apr 6, 2017 · US
Method for manufacturing a micromechanical timepiece part and said micromechanical timepiece part
US-2017068215-A1 · Mar 9, 2017 · US
MEMS device structure with a capping structure
US-9573806-B2 · Feb 21, 2017 · US
Release chemical protection for integrated complementary metal-oxide-semiconductor (cmos) and micro-electro-mechanical (mems) devices
US-2017015547-A1 · Jan 19, 2017 · US
Microelectronic interconnect element with decreased conductor spacing
US-9524947-B2 · Dec 20, 2016 · US
Island etched filter passages
US-2016346714-A1 · Dec 1, 2016 · US
Process for manufacturing a microelectromechanical interaction system for a storage medium
US-2016332871-A1 · Nov 17, 2016 · US
Release chemical protection for integrated complementary metal-oxide-semiconductor (CMOS) and micro-electro-mechanical (MEMS) devices
US-9487396-B2 · Nov 8, 2016 · US
Mems-based cantilever energy harvester
US-2016322559-A1 · Nov 3, 2016 · US
Method for Fabricating Suspended MEMS Structures
US-2016304340-A1 · Oct 20, 2016 · US
Method for manufacturing a composite compensating balance spring
US-9428382-B2 · Aug 30, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B81C1/00539?
- CPC B81C1/00539 is the Cooperative Patent Classification code for “Wet etching.”
- How many patents are filed under CPC B81C1/00539 (Wet etching)?
- Our database includes 190 publications tagged with this CPC code.
- Is patent activity under CPC B81C1/00539 growing?
- Publication counts under this code: 12 in 2024 vs 6 in 2025 (latest complete years).