- 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: 7713
10-year publication summary
|
501
|
539
|
551
|
576
|
510
|
519
|
534
|
616
|
569
|
37
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Screen Holdings Co., Ltd. | 2959 |
564 |
| Tokyo Electron Limited | 13266 |
545 |
| Fujimi Incorporated | 767 |
336 |
| Applied Materials, Inc. | 19474 |
301 |
| Ebara Corporation | 2248 |
295 |
| Shin-Etsu Handotai Co., Ltd. | 1296 |
294 |
| Disco Corporation | 1914 |
289 |
| FUJIFILM Corporation | 29976 |
197 |
| Sumco Corporation | 1116 |
175 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 46375 |
172 |
| Hitachi Chemical Company, Ltd. | 2309 |
126 |
| Lintec Corporation | 1994 |
119 |
| Resonac Corporation | 3051 |
94 |
| Nissan Chemical Corporation | 2122 |
85 |
| Semiconductor Components Industries, L.L.C. | 5297 |
84 |
| JSR Corporation | 2551 |
84 |
| Cabot Microelectronics Corporation | 186 |
75 |
| Sumitomo Electric Industries, Ltd. | 15890 |
69 |
| Nitto Denko Corporation | 8387 |
61 |
| Kurita Water Industries Ltd. | 1238 |
61 |
| Other owners | 3687 |