- 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: 1996
10-year publication summary
|
204
|
210
|
185
|
188
|
155
|
148
|
136
|
97
|
90
|
23
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Epistar Corporation | 1553 |
180 |
| Seoul Viosys Co., Ltd. | 1359 |
131 |
| OSRAM Opto Semiconductors GmbH | 3390 |
95 |
| Suzhou Lekin Semiconductor Co., Ltd. | 1710 |
95 |
| OSRAM OLED GmbH | 1841 |
75 |
| Samsung Electronics Co., Ltd. | 131630 |
70 |
| LG Innotek Co., Ltd. | 6758 |
58 |
| Nichia Corporation | 3394 |
55 |
| Sensor Electronic Technology, Inc. | 471 |
45 |
| Lumileds LLC | 1827 |
40 |
| Seoul Semiconductor Co., Ltd. | 1073 |
27 |
| LG Electronics Inc. | 69257 |
26 |
| Hon Hai Precision Industry Co., Ltd. | 4157 |
26 |
| Tsinghua University | 5426 |
26 |
| Xiamen San'an Optoelectronics Co., Ltd. | 245 |
26 |
| The Regents of the University of California | 18943 |
24 |
| Stanley Electric Co., Ltd. | 1102 |
23 |
| Creeled, Inc. | 748 |
23 |
| Rohm Co., Ltd. | 5843 |
22 |
| Micron Technology, Inc. | 24960 |
19 |
| Other owners | 910 |