- 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: 7820
10-year publication summary
|
501
|
539
|
551
|
576
|
509
|
521
|
532
|
602
|
568
|
274
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Screen Holdings Co., Ltd. | 3148 |
581 |
| Tokyo Electron Limited | 13796 |
557 |
| Fujimi Incorporated | 801 |
348 |
| Applied Materials, Inc. | 20363 |
310 |
| Ebara Corporation | 2323 |
302 |
| Disco Corporation | 1957 |
292 |
| Shin-Etsu Handotai Co., Ltd. | 1306 |
291 |
| FUJIFILM Corporation | 30512 |
205 |
| Sumco Corporation | 1108 |
177 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 48248 |
174 |
| Lintec Corporation | 2008 |
123 |
| Hitachi Chemical Company, Ltd. | 2245 |
119 |
| Resonac Corporation | 3516 |
115 |
| Nissan Chemical Corporation | 2218 |
86 |
| Semiconductor Components Industries, L.L.C. | 5264 |
84 |
| JSR Corporation | 2555 |
82 |
| Cabot Microelectronics Corporation | 167 |
73 |
| Sumitomo Electric Industries, Ltd. | 16305 |
69 |
| Fujibo Holdings, Inc. | 109 |
64 |
| Kurita Water Industries Ltd. | 1283 |
63 |
| Other owners | 3705 |