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Gallium arsenide GaAs has some better electronic characteristics than Si, such as high saturation electron velocity and high electron mobility, making GaAs can be used in occasions higher than 250 GHz. GaAs will have less noise if the equivalent GaAs and Si components are both operating at high frequencies
Product Description
Gallium arsenide GaAs has some better electronic characteristics than Si, such as high saturation electron velocity and high electron mobility, making GaAs can be used in occasions higher than 250 GHz. GaAs will have less noise if the equivalent GaAs and Si components are both operating at high frequencies. Also because GaAs has a higher breakdown voltage, GaAs is more suitable for high-power operation than the same Si device. Because of these characteristics, GaAs circuits can be used in mobile phones, satellite communications, microwave point-to-point connections, radar systems, etc.
GaAs has been used to make Gunn diodes (Gane diodes or microwave diodes, Gunn diodes) to emit microwaves.
Another advantage of GaAs: it is a direct energy gap material, so it can be used to emit light. Si is a material with an indirect energy gap and can only emit very weak light. (However, recent technologies can already use Si to make LEDs and use them in lasers
Material properties
| single crystal | doping | conductivity type | Carrier concentration cm-3 | Dislocation density cm-2 | growth methodbiggest size | standard substrate |
| GaAs | none | Si | / | <5×10 5 | LECHB | D3″×0.5D2″×0.5 |
| Si | N | >5×10 17 | ||||
| Cr | Si | / | ||||
| Fe | N | ~2×10 18 | ||||
| Zn | P | >5×10 17 | ||||
| Dimensions (mm) | 25×25×0.5mm, 10×10×0.5mm, 10×5×0.5mm, 5×5×0.5mm or customizedSubstrates with special directions and sizes can be customized according to customer needs | |||||
| Surface roughness | Ra <1nm | |||||
| polishing | single or double sided | |||||
| Package | Class 100 clean bag, Class 1000 ultra-clean room | |||||
