Method of estimating oxygen concentration of silicon single crystal and method of manufacturing silicon single crystal
US-2020407870-A1 · Dec 31, 2020 · US
using magnetic fields
using magnetic fields · 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 | C30B30/04 |
| Official title | using magnetic fields |
| Display label | using magnetic fields |
| Total patents | 203 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 9 |
| 2017 | 11 |
| 2018 | 15 |
| 2019 | 15 |
| 2020 | 25 |
| 2021 | 26 |
| 2022 | 21 |
| 2023 | 22 |
| 2024 | 30 |
| 2025 | 17 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of controlling convection patterns of silicon melt and method of manufacturing silicon single crystal
US-2020407875-A1 · Dec 31, 2020 · US
Methods for producing low oxygen silicon ingots
US-10513796-B2 · Dec 24, 2019 · US
Permanent magnet and method of making permanent magnet
US-2019385789-A1 · Dec 19, 2019 · US
Apparatus for growing single crystalline ingot and method for growing same
US-2019382915-A1 · Dec 19, 2019 · US
Method of producing silicon single crystal, and silicon single crystal wafer
US-2019376205-A1 · Dec 12, 2019 · US
Furnace for seeded sublimation of wide band gap crystals
US-2019330763-A1 · Oct 31, 2019 · US
Apparatus for growing single crystalline ingot and method for growing same
US-10435809-B2 · Oct 8, 2019 · US
Systems for selectively feeding chunk polysilicon or granular polysilicon in a crystal growth chamber
US-2019211469-A1 · Jul 11, 2019 · US
Furnace for seeded sublimation of wide band gap crystals
US-10344396-B2 · Jul 9, 2019 · US
Separate vessel metal shielding method for magnetic flux in directional solidification furnace
US-10337121-B2 · Jul 2, 2019 · US
Method for producing a semiconductor wafer of monocrystalline silicon, device for producing a semiconductor wafer of monocrystalline silicon and semiconductor wafer of monocrystalline silicon
US-2019136404-A1 · May 9, 2019 · US
Separate vessel metal shielding method for magnetic flux in directional solidification furnace
US-2019127882-A1 · May 2, 2019 · US
Systems for selectively feeding chunk polysilicon or granular polysilicon in a crystal growth chamber
US-10273596-B2 · Apr 30, 2019 · US
Single-crystal pulling apparatus and single-crystal pulling method
US-10253425-B2 · Apr 9, 2019 · US
Method and apparatus for growing indium oxide (In2O3) single crystals and indium oxide (In2O3) single crystal
US-10208399-B2 · Feb 19, 2019 · US
Growing apparatus and single-crystal ingot growing method using the same
US-2019017191-A1 · Jan 17, 2019 · US
Systems and methods for production of low oxygen content silicon
US-2018355509-A1 · Dec 13, 2018 · US
Method for growing monocrystalline silicon and monocrystalline silicon ingot prepared thereof
US-10100431-B2 · Oct 16, 2018 · US
Apparatus for growing single crystalline ingot and method for growing same
US-2018237939-A1 · Aug 23, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C30B30/04?
- CPC C30B30/04 is the Cooperative Patent Classification code for “using magnetic fields.”
- How many patents are filed under CPC C30B30/04 (using magnetic fields)?
- Our database includes 203 publications tagged with this CPC code.
- Is patent activity under CPC C30B30/04 growing?
- Publication counts under this code: 30 in 2024 vs 17 in 2025 (latest complete years).