• All sections
• H - Electricity
• H01L - Semiconductor devices not covered by class
• H01L 31/20 - Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof such devices or parts thereof comprising amorphous semiconductor material

Patent holdings for IPC class H01L 31/20

Total number of patents in this class: 685

10-year publication summary

Principal owners for this class