Patent ID: 7728384

Claim:
A magnetic random access memory (MRAM) cell, comprising: a silicon substrate; a bottom implant (BI) region in the silicon substrate, the BI region having opposing sides contacting the substrate and a first polarity; a contact implant (CI) region being positioned in portion of the silicon substrate that is within the BI region such that the CI region is surrounded by the BI region except for a side of the CI region that aligns with surface of the silicon substrate, the CI region having a second polarity which is opposite to the first polarity of the BI region, wherein the BI region and the CI region form a single crystal self-aligned diode; a contact formed over the CI region; a layer forming first and second spacers adjacent to the contact and respectively at opposite sidewalls of the contact over the silicon substrate; first and second metal silicide lines covering a portion of the bottom implant (BI) region and defined respectively at least partially under the layer and adjacent to the first spacer and the second spacer; and a MRAM device defined over of the contact.