• All sections
• H - Electricity
• H01L - Semiconductor devices not covered by class
• H01L 21/18 - Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials

Patent holdings for IPC class H01L 21/18

Total number of patents in this class: 803

10-year publication summary

Principal owners for this class