TRANSISTOR, METHOD FOR FORMING ELECTRIC CURRENT CHANNEL IN SUBSTRATE, AND MOBILE ELECTRONIC DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a method for forming an electric current channel in a substrate having a first conduction type.SOLUTION: A method comprises forming an impurity region 314 that has a second conduction type and extends from a surface of a substrate to a first depth position. A hole 350 is formed in the impurity region. First dielectric layers 360 to 364 are formed on an inner surface of the hole. A first electrode 306 is formed in the hole adjacent to the dielectric layers.