Patent ID: 9558949
Date: 2017-01-31
CPC Classifications: H01L

Claim:
1. A method of forming non-volatile storage, comprising: forming over a plurality of global bit lines that are elongated in a first direction a plurality of layer stack lines that are elongated in a second direction, each layer stack line of the plurality having two vertical sidewalls and including one or more silicon layers for the body of a plurality of vertical thin film transistor (TFT) select devices, the first direction is substantially orthogonal to the second direction, the first direction and the second direction are substantially parallel to a surface of a substrate; forming a gate dielectric layer after forming the plurality of layer stack lines, the gate dielectric layer extending vertically in a third direction along the two vertical sidewalls of each layer stack line and horizontally in the first direction from a vertical sidewall of each layer stack line to an adjacent vertical sidewall of an adjacent layer stack line in the first direction, the third direction is substantially orthogonal to the first direction and the second direction and substantially perpendicular to the surface; forming a plurality of dielectric bases elongated in the second direction; forming a gate layer after forming the plurality of dielectric bases; and etching back the gate layer to form at least one gate for each layer stack line of the plurality, the at least one gate is separated from a corresponding layer stack line by the gate dielectric layer, each dielectric base extending in the third direction between a corresponding at least one gate and the gate dielectric layer.