| 摘要 |
A lighting device includes:
- an insulated metal substrate (10, 12, 14; 10a, 12, 14) carrying electrically conductive lines (14), the insulated metal substrate including a metal base layer (12),
- one or more electrically powered light radiation sources (16), e.g. LED sources, mounted on the electrically conductive lines (14),
- a thermally dissipative support (20) carrying the insulated metal substrate (10, 12, 14; 10a, 12, 14), the light radiation source(s) (16) being mounted on the electrically conductive lines (14). There are provided a first electrically insulating layer (10) interposed between the electrically conductive lines (14) and the base metal layer (12), and a second electrically insulating layer (100) interposed between the base metal layer (12) and the thermally dissipative support (20). The second electrically insulating layer includes a ceramic material coating onto said base metal layer (12). |
