Patent ID: 8765543
Filing Date: 2014-07-01
Classification: H01L

Abstract:
1. A method of making a monolithic three dimensional NAND string, comprising: forming a stack of alternating layers of a first layer and a second layer over a substrate, wherein the first layer comprises a conductive or semiconductor control gate material and wherein the second layer comprises an insulating material; etching the stack to form at least one opening in the stack; selectively etching the first layer to form first recesses; forming a conductive or semiconductor liner in the first recesses, the conductive or semiconductor liner having a clam shape; forming a blocking dielectric over the conductive or semiconductor liner in the first recesses; forming a plurality of discrete charge storage segments separated from each other in the first recesses over the blocking dielectric; forming a tunnel dielectric over a side wall of the discrete charge storage segments exposed in the at least one opening; and forming a semiconductor channel in the at least one opening.