Silicon-LED-packages for more UV light
Modern, semiconductor-based UV LEDs create fields of innovation and promise markets with high economic benefits.
UV LEDs contain no toxic mercury, which is still used today in conventional lamp technology. They are much smaller and more durable than traditional UV lamps and more resistant to vibration and shock, resulting in less malfunctions (breakage) and reduced disposal and maintenance costs.
In medicine, powerful UV LEDs make the detection of pathogens or the targeted sterilisation and disinfection of surfaces and water more flexible, efficient, safe and reliable. Although there have been major improvements in both luminous efficacy and lifetime of LEDs available on the market in recent years, increasing usable optical output power and thermal management remain major challenges in system design.
Packages based on silicon technologies make a decisive contribution here.
The CiS Research Institute develops and manufactures high-quality, hermetically sealed housings for LEDs. The component carrier is a silicon chip with electrical through-plating to the rear and an integrated protective diode for the sensitive UV LED. A reflector frame - also based on a silicon chip - surrounds the LED and ensures that the light emitted from the side is deflected forwards. A planar optic is used as a hermetic lid, which additionally bundles the UV light of the LED packaged in this way. The assembly of this SMD-capable multichip module takes place completely on the wafer level, which - despite the high-quality materials - results in low manufacturing costs. The high thermal conductivity of the base material silicon enables very good heat dissipation of the LED and thus guarantees a long service life. At the same time, the reflector and optical lens triple the usable light.
The CiS Research Institute does not see itself as a manufacturer, but as a partner of industry in the field of applied research and makes its know-how available to industrial companies in joint projects.