• All sections
• H - Electricity
• H01L - Semiconductor devices not covered by class
• H01L 21/223 - Diffusion of impurity materials, e.g. doping materials, electrode materials, into, or out of, a semiconductor body, or between semiconductor regionsRedistribution of impurity materials, e.g. without introduction or removal of further dopant using diffusion into, or out of, a solid from or into a gaseous phase

Patent holdings for IPC class H01L 21/223

Total number of patents in this class: 366

10-year publication summary

Principal owners for this class