Patterned Sapphire Substrates (PSS) is micro-patterned sapphire substrate used to for GaN based light emitting diodes(LEDS). The PSS reduces the dislocation density in the GaN layer, enhances the light extraction efficiency and increase LEDs’brightness.
2inch Cplane Patterned Sapphire Substrate (PSS)
|Crystal Material||99.996%,high purity, monocrystalline Al2O3|
|Orientation||Cplane to Mplane|
|Patterned Spec||Diameter: 2.7 ± 0.15 μm; Spacing: 0.3 ± 0.15 μm; Depth: 1.75 ± 0.15 μm|
|Pattern type||3μm pitch, Cone Type|
|Surface||SSP or DSP|
|TTV/BOW/WARP||≤ 10 μm|
|Package||Class 100 clean room cleaning, vacuum packaging; 25 pieces in one cassette packaging or individual packaging|
a patterned sapphire substrate (PSS) was used to obtain mesa-type light-emitting diodes (LED), which can efficiently reduce the threading dislocation densities.