PSS图形化衬底


 

        蓝宝石LED衬底通过PSS加工后,会改善蓝宝石LED衬底的缺陷,由外延芯片封装出来的LED发光源能大大提高其发光效率 

晶片参数

Item 2" 4"(研发中)
Crystal LED Grade Sapphire LED Grade Sapphire
Sapphire purity ≥99.998% ≥99.998%
Color Transparent Transparent
Orientation C plane tiled M axis 0.20°±0.1° C plane tiled M axis 0.20°±0.1°
Diameter 50.8±0.1mm 100±0.2mm
Diameter 50.8±0.1mm 100±0.2mm
Thickness 430±15µm 650±25µm
Primary Flat Location A-axis ± 0.2° A-axis ± 0.2°
Flat Length 16.0±1.0 mm 30.0 ±1.0 mm
Front side surface Epi-ready patterned surface Epi-ready patterned surface
Back side surface Fine ground; Ra < 1.2 um Fine ground; Ra < 1.2 um
TTV ≤ 5.0µm ≤ 10µm
BOW ≤ -10µm ≤ -20µm
Pattern diameter 2.6±0.15 um 2.6±0.15 um
Pattern height 1.6±0.15 um 1.6±0.15 um
Pattern pitch 3.0±0.15 um 3.0±0.15 um
Pattern arrangement Close-packed arrangement; hexagonal type Close-packed arrangement; hexagonal type
Defective patterns Total defective area ≦3% of wafer area; Inspection by naked eye added without bright light Total defective area ≦5% of wafer area; Inspection by naked eye added without bright light
Scratch Visible to naked eye added without bright light; total length < 3mm Visible to naked eye added without bright light; total length < 5mm
Package Clean room, vacuum packing Clean room, vacuum packing

 

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