• All sections
• H - Electricity
• H01L - Semiconductor devices not covered by class
• H01L 21/228 - 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 liquid phase, e.g. alloy diffusion processes

Patent holdings for IPC class H01L 21/228

Total number of patents in this class: 70

10-year publication summary

Principal owners for this class