Wafer and semiconductor device
US-2025359237-A1 · Nov 20, 2025 · US
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Iijima Ryosuke patents
Iijima Ryosuke is listed as an inventor on 152 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Iijima Ryosuke |
| Total patents | 152 |
| First publication | Feb 5, 2015 |
| Latest publication | Nov 20, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Wafer and semiconductor device
US-2025359238-A1 · Nov 20, 2025 · US
Semiconductor device and method for manufacturing semiconductor device
US-12477809-B2 · Nov 18, 2025 · US
Wafer having a silicon carbide crystal layer with stacking faults provided on a silicon carbide base body and semiconductor device manufactured using the wafer
US-12406844-B2 · Sep 2, 2025 · US
Semiconductor device, semiconductor device manufacturing method, inverter circuit, drive device, vehicle, and elevator
US-12328900-B2 · Jun 10, 2025 · US
Wafer and method for manufacturing the same
US-2025089322-A1 · Mar 13, 2025 · US
Semiconductor device and method for manufacturing the same
US-2024266400-A1 · Aug 8, 2024 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-2023317844-A1 · Oct 5, 2023 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-2023299193-A1 · Sep 21, 2023 · US
Semiconductor device, semiconductor device manufacturing method, inverter circuit, drive device, vehicle, and elevator
US-2023299192-A1 · Sep 21, 2023 · US
Recent patents
Latest publications not already listed above.
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-11764276-B2 · Sep 19, 2023 · US
Semiconductor device
US-11646368-B2 · May 9, 2023 · US
Wafer and semiconductor device
US-2023107057-A1 · Apr 6, 2023 · US
Semiconductor device, semiconductor device manufacturing method, inverter circuit, drive device, vehicle, and elevator
US-2023080779-A1 · Mar 16, 2023 · US
Semiconductor device manufacturing method
US-2023084127-A1 · Mar 16, 2023 · US
Wafer, semiconductor device, method for manufacturing wafer, and method for manufacturing semiconductor device
US-2023064469-A1 · Mar 2, 2023 · US
Semiconductor device and method for manufacturing semiconductor device
US-2023064865-A1 · Mar 2, 2023 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-11495665-B2 · Nov 8, 2022 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-11411084-B2 · Aug 9, 2022 · US
Semiconductor device and method for manufacturing the same
US-11404550-B2 · Aug 2, 2022 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-11398556-B2 · Jul 26, 2022 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevating machine
US-11374122-B2 · Jun 28, 2022 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-2022190130-A1 · Jun 16, 2022 · US
Semiconductor device having multiple conductive parts
US-11355602-B2 · Jun 7, 2022 · US
Semiconductor device, inverter circuit, driving device, vehicle, and elevator having a reduced on-resistance with a silicon carbide layer
US-11276758-B2 · Mar 15, 2022 · US
Semiconductor device, inverter circuit, driving device, vehicle, and elevator
US-11276774-B2 · Mar 15, 2022 · US
Semiconductor device, inverter circuit, driving device, vehicle, and elevator
US-11276751-B2 · Mar 15, 2022 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-11245017-B2 · Feb 8, 2022 · US
Semiconductor device
US-2022029012-A1 · Jan 27, 2022 · US
Semiconductor device, inverter circuit, drive device, vehicle, and elevator
US-2022013638-A1 · Jan 13, 2022 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Toshiba Kk | 152 |
| Toshiba Electronic Devices & Storage Corp | 2 |
| Fuji Electric Co Ltd | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| H10D62/8325 | 143 |
| H01L29/1608 | 130 |
| H10D30/668 | 85 |
| H10D62/393 | 84 |
| H10D12/031 | 84 |