Patent ID: 7235463
Filing Date: 2007-06-26
Classification: H01L

Abstract:
1. A method for fabricating electrode insulator perpendicular to a first electrode formed on a substrate, and insulating a second electrode from said first electrode, comprising the steps of: kk (a) spinning a photoresist on the substrate and patterning the photoresist by lithography with a first mask to form a deposition-mask on the substrate; (b) depositing an inorganic dielectric thin film with insulation from which a column of ridges is constructed; (c) stripping the deposition-mask by lift-off technique, thereby constructing a column of ridges from the inorganic dielectric thin film with insulation; (d) spinning a photoresist on the substrate, depositing an inorganic film on the photoresist, and spinning a second, top photoresist on the inorganic film; (e) patterning and developing the top photoresist with a second mask to form troughs, etching the inorganic film beneath the troughs, and etching the photoresist under the inorganic film through the troughs until the columns of ridges are exposed to the air with desired height; (f) depositing an inorganic film into the trough to form the cover which covers the ridge; and (g) stripping both the first and second photoresist layers and the inorganic layer, thereby constructing the T-shaped insulator assembled by the ridge and the cover.