Patent ID: 8138562
Filing Date: 2012-03-20
Classification: H01L

Abstract:
1. A MRAM structure formed on a substrate, comprising: (a) a first conductive metal layer formed on the substrate and comprising a first conductive line and a first conductive metal pad; (b) a plurality of bottom electrodes aligned above said first conductive line and separated from the first conductive line by a first dielectric layer; (c) a plurality of magnetic tunnel junction (MTJ) elements wherein each MTJ has a bottom surface contacting a bottom electrode, and an uppermost top electrode with a top surface having a first width; (d) a plurality of metal contact bridges (MCBs) wherein each MCB has a bottom surface contacting a top surface of an underlying top electrode, and a top surface contacting a second conductive line, each of said MCBs has a second width greater than said first width; and (e) a second conductive metal layer comprising: