Patent ID: 6340425
Filing Date: 2002-01-22
Classification: C25F,H01J

Abstract:
A method for manufacturing a cold cathode device which has a porous silicon portion as an emitter portion, the method including:forming an object that comprises a silicon layer, a gate electrode, and an insulator layer interposed between the silicon layer and the gate electrode, the gate electrode having a gate aperture, the insulator layer having a through-hole corresponding to the gate aperture, the silicon layer having a predetermined portion exposed inside the through-hole; soaking a part of the object into an electrolytic solution to fill both the through-hole and the gate aperture with the electrolytic solution; and giving the silicon layer an electric potential, while giving the gate electrode another potential lower than that of the silicon layer, so that the predetermined portion is subjected to anodic etching to be rendered into the porous silicon portion, and thereby, the object is changed into the cold cathode device.