Patent ID: 7569401

Claim:
A method of fabricating a magnetic random access memory (MRAM) cell, comprising: forming a first interlayer insulating layer on a semiconductor substrate; forming a groove in the first interlayer insulating layer; forming a conformal cladding layer on the substrate having the groove; forming a separating wall on a predetermined region of the cladding layer in the groove to divide at least a portion of the grove into first and second grooves; forming first and second sub-digit lines filling the first and second grooves respectively; selectively removing the cladding layer on a top surface of the first interlayer insulating layer to form a cladding layer pattern covering only a bottom surface and sidewalls of the groove; forming a capping layer on the substrate having the sub-digit lines and the cladding layer pattern; forming an opening penetrating the capping layer, the separating wall and the cladding layer pattern to pass through a region between the first and second sub-digit lines; forming a spacer covering a sidewall of the opening; and etching the first interlayer insulating layer using the spacer as an etch mask to form a magnetic resistor contact hole exposing the semiconductor substrate.