- 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: 701
10-year publication summary
|
41
|
32
|
31
|
30
|
20
|
21
|
24
|
20
|
31
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FUJIFILM Corporation | 27102 |
48 |
| Tokyo Electron Limited | 11599 |
47 |
| JSR Corporation | 2476 |
29 |
| Nissan Chemical Industries, Ltd. | 1822 |
28 |
| Nissan Chemical Corporation | 1725 |
25 |
| Hitachi Chemical Company, Ltd. | 2455 |
22 |
| Sumitomo Chemical Company, Limited | 8808 |
16 |
| Toray Industries, Inc. | 6652 |
16 |
| Mitsui Chemicals, Inc. | 3134 |
15 |
| Sumitomo Bakelite Co., Ltd. | 1416 |
14 |
| Applied Materials, Inc. | 16587 |
12 |
| Zeon Corporation | 3854 |
12 |
| Central Glass Company, Limited | 1244 |
11 |
| Tokyo Ohka Kogyo Co., Ltd. | 1481 |
10 |
| International Business Machines Corporation | 60644 |
9 |
| Micron Technology, Inc. | 24960 |
9 |
| Shin-Etsu Chemical Co., Ltd. | 5132 |
9 |
| NEC Corporation | 32703 |
8 |
| Dow Corning Corporation | 1072 |
8 |
| Pioneer Corporation | 4843 |
7 |
| Other owners | 346 |