- All sections
- H - Electricity
- H01L - Semiconductor devices not covered by class
- H01L 21/312 - Organic layers, e.g. photoresist
Patent holdings for IPC class H01L 21/312
Total number of patents in this class: 708
10-year publication summary
|
31
|
30
|
20
|
21
|
24
|
20
|
31
|
41
|
45
|
16
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FUJIFILM Corporation | 30277 |
76 |
| Tokyo Electron Limited | 13553 |
57 |
| Nissan Chemical Corporation | 2170 |
37 |
| JSR Corporation | 2513 |
28 |
| Nissan Chemical Industries, Ltd. | 1666 |
27 |
| Hitachi Chemical Company, Ltd. | 2267 |
21 |
| Toray Industries, Inc. | 7045 |
20 |
| Sumitomo Chemical Company, Limited | 9055 |
17 |
| Mitsui Chemicals, Inc. | 3219 |
17 |
| Applied Materials, Inc. | 20053 |
12 |
| Central Glass Company, Limited | 1286 |
12 |
| Sumitomo Bakelite Co., Ltd. | 1519 |
11 |
| Shin-Etsu Chemical Co., Ltd. | 5952 |
10 |
| Zeon Corporation | 4121 |
10 |
| Micron Technology, Inc. | 27310 |
8 |
| International Business Machines Corporation | 62251 |
7 |
| ULVAC, Inc. | 1360 |
7 |
| Samsung Display Co., Ltd. | 37933 |
6 |
| Fujitsu Limited | 17003 |
6 |
| Kaneka Corporation | 4639 |
6 |
| Other owners | 313 |