Patent ID: 9129983
Filing Date: 2015-09-08
Classification: H01L

Abstract:
1. A method of forming a vertically oriented thyristor and a control gate operatively laterally adjacent thereto and of forming a vertically oriented access transistor which shares a doped semiconductor region with the thyristor, the method comprising: forming a general U-shape of semiconductor material in lateral cross section, the general U-shape having a pair of vertical stems having a base extending laterally there-between in the lateral cross section; forming at least one of an access gate for the access transistor and the control gate for the thyristor within the general U-shape between the stems; and after forming the at least one of the access gate and the control gate, doping the base between the stems with a conductivity modifying impurity of at least one of n type and p type and forming the shared doped semiconductor region there-from.