Patent ID: 9112044
Filing Date: 2015-08-18
Classification: H01L

Abstract:
1. A three-dimensional (3-D) non-volatile memory device, comprising: a substrate having a surface in a X-Y plane; a plurality of word line structures extended in a X-axis and neighbored in a Y-axis, wherein each of the plurality of word line structures comprises a plurality of interlayer dielectric layers stacked in a Z-axis over the substrate and a plurality of word lines interposed between the interlayer dielectric layers; a plurality of channel layers extended in the Z-axis and configured to penetrate the plurality of interlayer dielectric layers and the plurality of word lines; and an air gap formed between the word line structures neighbored in the Y-axis, wherein the X-axis and the Y-axis are orthogonal to each other and defined in the X-Y plane, and the Z-axis is orthogonal to the X-Y plane.