Patent ID: 6424563
Filing Date: 2002-07-23
Classification: B82Y,G11C,H01L

Abstract:
An MRAM memory cell, comprising:a zeroth metallization plane having an interconnect; a first metallization plane having an interconnect; a second metallization plane having an interconnect, said second metallization plane forming a topmost metallization plane, said interconnect of said second metallization plane crossing said interconnect of said first metallization plane essentially perpendicularly; a bit line running in said zeroth metallization plane; a word line having a stitch contact connected to said interconnect of said first metalization plane; a switching transistor having a gate connected to said interconnect of said first metalization plane by said word line and said stitch contact, said switching transistor having a source-drain path connected between said interconnect of said zeroth metallization plane and said interconnect of said second metallization plane, said source-drain path connected to said bit line; and a magnetoresistive resistor extending between said interconnect of said first metallization plane and said interconnect of said second metallization plane such that said interconnect of the first metallization plane is connected to said stitch contact of said word line and such that said magnetoresistive resistor can perform a dual function of a word line stitch and of a write line for said magnetoresistive resistor.