Patent ID: 11864466
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 15:
16. A semiconductor device including a magnetic random access memory (MRAM) cell, comprising:
a first interlayer dielectric (ILD) layer disposed over a substrate;
a first lower contact and a second lower contact both embedded in the first ILD layer;
a first magnetic random access memory (MRAM) cell structure disposed over the first lower contact and a second MRAM cell structure disposed over the second lower contact, each of the first and second MRAM cell structures including a bottom electrode, a magnetic tunnel junction (MTJ) stack and a top electrode;
a first insulating cover layer covering sidewalls of each of the first and second MRAM cell structures;
a second ILD layer filling a space between the first and second MRAM cell structures;
a third ILD layer disposed over the second ILD layer; and
a conductive contact in contact with the top electrode of each of the MRAM cell structures, wherein:
the third ILD layer includes multiple layers, and is separated from the first insulating cover layer by the second ILD layer, and
the conductive contact passes through the multiple layers.