Patent ID: 8921819
Filing Date: 2014-12-30
Classification: G11C,H01L

Abstract:
1. A resistive random access memory (RRAM) device on a substrate, the RRAM device comprising: at least one bit line extending along a first direction; at least one word line extending along a second direction and intersecting the bit line; a hard mask layer directly positioned on the word line and interposed between the word line and the bit line; a first memory cell disposed on a first sidewall of the word line, the first memory cell from the sidewall of the word line sequentially comprising: a first spacer-type resistance layer; a first top electrode covering the first resistance layer and a first sidewall of the hard mask layer, wherein the first sidewall of the word line and the first sidewall of the hard mask layer are coplanar; and a first diode covering the first top electrode; and a second memory cell disposed on a second sidewall of the word line, the second memory cell from the other sidewall of the word line sequentially comprising: a second spacer-type resistance layer; a second top electrode covering the second resistance layer and a second sidewall of the hard mask layer, wherein the second sidewall of the word line and the second sidewall of the hard mask layer are coplanar; and a second diode covering the second top electrode.