- 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: 7484
10-year publication summary
|
434
|
501
|
539
|
551
|
576
|
510
|
517
|
531
|
612
|
312
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Screen Holdings Co., Ltd. | 2814 |
543 |
| Tokyo Electron Limited | 12712 |
527 |
| Fujimi Incorporated | 742 |
327 |
| Shin-Etsu Handotai Co., Ltd. | 1284 |
298 |
| Applied Materials, Inc. | 18621 |
284 |
| Ebara Corporation | 2169 |
279 |
| Disco Corporation | 1858 |
274 |
| FUJIFILM Corporation | 29367 |
194 |
| Sumco Corporation | 1115 |
173 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 42704 |
160 |
| Hitachi Chemical Company, Ltd. | 2350 |
132 |
| Lintec Corporation | 1962 |
118 |
| Resonac Corporation | 2800 |
87 |
| JSR Corporation | 2517 |
85 |
| Semiconductor Components Industries, L.L.C. | 5251 |
84 |
| Cabot Microelectronics Corporation | 198 |
79 |
| Nissan Chemical Corporation | 2010 |
74 |
| Sumitomo Electric Industries, Ltd. | 15483 |
69 |
| Central Glass Company, Limited | 1265 |
56 |
| Fujibo Holdings, Inc. | 103 |
56 |
| Other owners | 3585 |