- All sections
- H - Electricity
- H01L - Semiconductor devices not covered by class
- H01L 33/22 - Roughened surfaces, e.g. at the interface between epitaxial layers
Patent holdings for IPC class H01L 33/22
Total number of patents in this class: 2047
10-year publication summary
|
210
|
185
|
188
|
155
|
147
|
134
|
94
|
86
|
91
|
38
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Epistar Corporation | 1477 |
184 |
| Seoul Viosys Co., Ltd. | 1490 |
145 |
| OSRAM Opto Semiconductors GmbH | 3286 |
92 |
| Suzhou Lekin Semiconductor Co., Ltd. | 1340 |
84 |
| Samsung Electronics Co., Ltd. | 149198 |
71 |
| OSRAM OLED GmbH | 1765 |
69 |
| LG Innotek Co., Ltd. | 7932 |
58 |
| Nichia Corporation | 3781 |
58 |
| Sensor Electronic Technology, Inc. | 468 |
45 |
| Lumileds Singapore Pte. Ltd. | 1264 |
35 |
| LG Electronics Inc. | 73825 |
30 |
| Creeled, Inc. | 951 |
30 |
| Hon Hai Precision Industry Co., Ltd. | 4024 |
26 |
| Tsinghua University | 6023 |
26 |
| Seoul Semiconductor Co., Ltd. | 1073 |
26 |
| Stanley Electric Co., Ltd. | 1302 |
25 |
| Xiamen San'an Optoelectronics Co., Ltd. | 298 |
25 |
| The Regents of the University of California | 20303 |
23 |
| Quanzhou Sanan Semiconductor Technology Co., Ltd | 232 |
23 |
| Micron Technology, Inc. | 26591 |
20 |
| Other owners | 952 |