Overview Led Chips Production Process And Mocvd Knowledge

By Author: Rihey
Total Articles: 118
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LED denotation piece, which is produced before LED chips,the basic principle is: on a heated to a proper temperature of the underlay substrate (mainly have sapphire, SiC, Si), gaseous InGaAlP been controled and been delivered substrate surface, grow a particular single crystal films. At present, the LED denotation piece growth technology mainly uses the organic metal chemical vapor deposition (MOCVD) method.

1. The exhibition after finish extension in each extension piece do the test at 9 spots at will. To meet the requirements for good quality products, the other for non-conforming (voltage bias is very big, wavelength partial short or partial long, etc.).

2. The good quality epitaxial wafer products to do electrode (P pole, N pole). Then use laser to cut and 100% sorting through, according to the different voltage wavelength, brightness sorting through automaticly,then formed LED chip (square slice).

3. Finally, check them with eyes andsort out the one which is worn out or have wrong with the electrode, these are sorting through the wafer scattered behind. At this time,there are disqualification chips ...
... on the blue film, these ships became edge piece or wool, etc. The non-conforming extension piece, generally do not do square slice, just done directly electrode (P pole, N pole), also need not do sorting, these are currently on the market LED wafer (led spotlights).

1. The accurate grasp of equipment. MOVCD,because each cost is high, maintenance cycle and accessories well-prepared are all important.

2. The master of the extension , material growth need physical, material and analysis technique three basic kung fu, can grasp these, growth of material can have certain ability.

3. Persistent experimental spirit, extension results need perseverance wait, because in addition to basic analysis, the results of the observing and record, made the analysis results of LED chips (wholesale LED lights), the need of patience and perseverance. from: led bulb light