marking of led wafers high-power led production usually requires traceablitiy markings with ocr or t data matrix codes. the marks are machine-readable, have no negative influence on subsequent manufacturing steps and still permit clear identification at the end of the process chain. features at a glance...
silicon laser marking of a μbga. for this application we recommend the laser marker: powerline e ic (shg) wafer marking wafer marking debris-free marking, which is set for clean-room environments, is just μm deep, and is achieved solely by melting of the silicon. for iii/iv wafer materials and glass wafers...
are used for production. wet etching the selected wafers then undergo a wet etching process where surfaces are immersed in acidic (multi) and alkaline (mono) solutions to help reduce light reflection. diffusion n-type emitters are formed by loading p-element poci gas into p-type wafers. ar coating these...