- 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: 7525
10-year publication summary
|
434
|
501
|
539
|
551
|
576
|
510
|
516
|
531
|
613
|
378
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Screen Holdings Co., Ltd. | 2856 |
545 |
| Tokyo Electron Limited | 12877 |
530 |
| Fujimi Incorporated | 742 |
325 |
| Shin-Etsu Handotai Co., Ltd. | 1283 |
296 |
| Applied Materials, Inc. | 18861 |
294 |
| Ebara Corporation | 2182 |
279 |
| Disco Corporation | 1869 |
278 |
| FUJIFILM Corporation | 29543 |
195 |
| Sumco Corporation | 1113 |
175 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 43258 |
159 |
| Hitachi Chemical Company, Ltd. | 2340 |
132 |
| Lintec Corporation | 1968 |
119 |
| Resonac Corporation | 2886 |
92 |
| JSR Corporation | 2525 |
85 |
| Semiconductor Components Industries, L.L.C. | 5269 |
84 |
| Cabot Microelectronics Corporation | 196 |
79 |
| Nissan Chemical Corporation | 2050 |
76 |
| Sumitomo Electric Industries, Ltd. | 15593 |
69 |
| Nitto Denko Corporation | 8280 |
57 |
| Central Glass Company, Limited | 1271 |
56 |
| Other owners | 3600 |