Patent ID: 9361966
Filing Date: 2016-06-07
CPC Classification: G11C,H01L

Claim Text:
1. A method of forming a plurality of thyristors, comprising: forming at least one wide-bandgap material over a monocrystalline silicon substrate, wherein a wide bandgap is a bandgap greater than or equal to 1.2 eV; patterning the wide-bandgap material into a plurality of substantially vertical thyristor pillars extending upwardly from the substrate; forming one or more dielectric materials along sidewalls of the thyristor pillars; forming gates along the thyristor pillars; the gates being spaced from the thyristor pillars by the one or more dielectric materials; the gates being in a two-to-one correspondence with the pillars so that each pillar is associated with a pair of vertically spaced gates; and forming a patterned material across the substrate, openings extending through the patterned material and to regions of the substrate, the openings being arranged in a first pattern, the method further comprising: epitaxially growing the wide-bandgap material to fill the openings with the wide-bandgap material and to form an expanse of the wide-bandgap material over the patterned material; forming a patterned mask over the expanse of the wide-bandgap material; and transferring a pattern from the mask to the expanse of the wide-bandgap material to pattern the wide-bandgap material into the thyristor pillars, wherein the patterned material comprises electrically conductive material.