Epitaxial silicon and doped silicon germanium superlattice and methods for preparing the same
US-2026043170-A1 · Feb 12, 2026 · US
Sandwich processes
Sandwich processes · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C30B25/22 |
| Official title | Sandwich processes |
| Display label | Sandwich processes |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 7 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-layered epitaxial stack formed in a presence of a higher order silicon precursor
US-2026009155-A1 · Jan 8, 2026 · US
Alpha gallium oxide thin-film structure having high conductivity obtained using selective area growth in HVPE growth manner and method for manufacturing the same
US-12480222-B2 · Nov 25, 2025 · US
Method of forming semiconductor structure, semiconductor structure, and semiconductor processing system
US-2025273461-A1 · Aug 28, 2025 · US
Method for manufacturing nitride semiconductor light-emitting element, and nitride semiconductor light-emitting element
US-2025183623-A1 · Jun 5, 2025 · US
Underlying substrate, single crystal diamond laminate substrate and method for producing them
US-2025154685-A1 · May 15, 2025 · US
Graphene hybrids for biological and chemical sensing
US-12247923-B2 · Mar 11, 2025 · US
Epitaxial wafer for ultraviolet ray emission device and method for manufacturing the same
US-2024258462-A1 · Aug 1, 2024 · US
Method for controlling layer-to-layer thickness in multi-tier epitaxial process
US-2024247405-A1 · Jul 25, 2024 · US
Method for preparing large-scale two-dimensional single crystal stack having interlayer rotation angle
US-2024183064-A1 · Jun 6, 2024 · US
Alpha gallium oxide thin-film structure having high conductivity obtained using selective area growth in hvpe growth manner and method for manufacturing the same
US-2024158953-A1 · May 16, 2024 · US
Method for producing an epitaxial wafer
US-2024063027-A1 · Feb 22, 2024 · US
Thermophotovoltaic cells with integrated air-bridge for improved efficiency
US-11901473-B2 · Feb 13, 2024 · US
Single-crystalline stack structure of two-dimensional transition metal chalcogenide and method of fabricating the same
US-2024035199-A1 · Feb 1, 2024 · US
Methods of forming superlattice structures using nanoparticles
US-2023352300-A1 · Nov 2, 2023 · US
Method of selectively forming crystalline boron-doped silicon germanium on a surface
US-2023352301-A1 · Nov 2, 2023 · US
Epitaxial reactor systems and methods of using same
US-2023203706-A1 · Jun 29, 2023 · US
Vapor phase growth method and vapor phase growth apparatus
US-2023145614-A1 · May 11, 2023 · US
Rutile phase tiox deposition with preferred crystal orientations
US-2023112967-A1 · Apr 13, 2023 · US
Graphene Hybrids for Biological and Chemical Sensing
US-2022178831-A1 · Jun 9, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C30B25/22?
- CPC C30B25/22 is the Cooperative Patent Classification code for “Sandwich processes.”
- How many patents are filed under CPC C30B25/22 (Sandwich processes)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC C30B25/22 growing?
- Publication counts under this code: 7 in 2024 vs 5 in 2025 (latest complete years).