- All sections
- H - Electricity
- H01L - Semiconductor devices not covered by class
- H01L 21/304 - Mechanical treatment, e.g. grinding, polishing, cutting
Patent holdings for IPC class H01L 21/304
Total number of patents in this class: 7398
10-year publication summary
|
434
|
501
|
539
|
551
|
576
|
509
|
516
|
530
|
612
|
208
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Screen Holdings Co., Ltd. | 2761 |
536 |
| Tokyo Electron Limited | 12452 |
518 |
| Fujimi Incorporated | 731 |
327 |
| Shin-Etsu Handotai Co., Ltd. | 1291 |
299 |
| Applied Materials, Inc. | 18334 |
284 |
| Ebara Corporation | 2127 |
274 |
| Disco Corporation | 1846 |
272 |
| FUJIFILM Corporation | 29172 |
190 |
| Sumco Corporation | 1125 |
172 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 41903 |
153 |
| Hitachi Chemical Company, Ltd. | 2365 |
132 |
| Lintec Corporation | 1954 |
118 |
| JSR Corporation | 2509 |
86 |
| Semiconductor Components Industries, L.L.C. | 5240 |
82 |
| Cabot Microelectronics Corporation | 203 |
79 |
| Resonac Corporation | 2640 |
79 |
| Nissan Chemical Corporation | 1955 |
71 |
| Sumitomo Electric Industries, Ltd. | 15277 |
69 |
| Fujibo Holdings, Inc. | 102 |
56 |
| Kurita Water Industries Ltd. | 1182 |
56 |
| Other owners | 3545 |