Integrated getter for vacuum or inert gas packaged LEDs

Abstract

A technique for controlling an atmosphere within an enclosure involves providing a getter within the atmosphere of the enclosure. An LED manufactured according the technique may include a getter within an enclosed volume of the LED device.

Description

Background technique [0001] Light-emitting diodes (LEDs) are solid-state light sources that work by combining electrons and holes at the junction of a p-semiconductor and an n-semiconductor. The emission of an LED is controlled by layers of different luminescent materials deposited on the LED chip (substrate). The light emitted by each layer is typically monochromatic. Different colors are achieved by using multiple layers of emissive materials and dyes. For example, multilayer luminescent materials of the InGaAlP family grown on suitable substrates can emit red, yellow and orange light. Grown on SiC and Al 2 o 3 The multi-layer luminescent material of the InGaAlP family on the substrate can emit blue, green and UV light. [0002] To obtain white light, the outputs of three such as red, green and blue LEDs can be combined. Alternatively, a single blue or UV LED can be used to excite a phosphor material placed near the blue or UV LED. Phosphor materials absorb blue or UV...

AI Technical Summary

Problems solved by technology

Thus, the output of LED 100 is dimmer and less white (eg, more yellow)

[0013] In addition, both the phosphor material and the InGaAlP multilayer structure react with moisture115 (such as water vapor), which diffuses through the solid-state polymeric domes and reduces the LED light emission intensity.

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