250 / | HD | RADIANT ENERGY |
492.1 | DF | IRRADIATION OF OBJECTS OR MATERIAL {2} |
492.2 | .~ Irradiation of semiconductor devices {4} | |
492.21 | DF | .~.~> Ion bombardment |
492.22 | DF | .~.~> Pattern control |
492.23 | DF | .~.~> Variable beam |
492.24 | DF | .~.~> Photocathode projection |