- 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: 6908
10-year publication summary
|
460
|
434
|
501
|
538
|
551
|
575
|
503
|
502
|
522
|
203
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tokyo Electron Limited | 11599 |
460 |
| Screen Holdings Co., Ltd. | 2431 |
446 |
| Fujimi Incorporated | 676 |
309 |
| Shin-Etsu Handotai Co., Ltd. | 1277 |
308 |
| Applied Materials, Inc. | 16587 |
276 |
| Ebara Corporation | 1951 |
266 |
| Disco Corporation | 1745 |
252 |
| FUJIFILM Corporation | 27102 |
176 |
| Sumco Corporation | 1116 |
159 |
| Hitachi Chemical Company, Ltd. | 2455 |
137 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 36809 |
122 |
| Lintec Corporation | 1915 |
116 |
| JSR Corporation | 2476 |
84 |
| Cabot Microelectronics Corporation | 219 |
82 |
| Semiconductor Components Industries, L.L.C. | 5345 |
73 |
| Sumitomo Electric Industries, Ltd. | 14131 |
65 |
| Nissan Chemical Corporation | 1725 |
58 |
| Kurita Water Industries Ltd. | 1110 |
56 |
| Toyo Tire & Rubber Co., Ltd. | 631 |
54 |
| Fujibo Holdings, Inc. | 97 |
53 |
| Other owners | 3356 |