Semiconductor structure with electrode ion migration - has auxiliary ion collector on face with main electrode with other main contact on opposite face

摘要

In a device with a main electrode (4) and a rear contact (3) there is mounted at least one additional auxiliary electrode (7) spaced from the main electrode. It is fed with a voltage that is of opposite polarity to that applied to the main electrode. The auxiliary electrode (7) may be on the surface and of ring-form, or it may be on a surface layer separating it from the main electrode. It may be of comb shape and of the same material as the main electrode. ADVANTAGE - Ions from main electrode are accelerated to auxiliary electrode without affecting main field.