International business machines corporation (20240135978). MRAM DEVICE WITH OCTAGON PROFILE simplified abstract

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MRAM DEVICE WITH OCTAGON PROFILE

Organization Name

international business machines corporation

Inventor(s)

Oscar Van Der Straten of Guilderland Center NY (US)

Chih-Chao Yang of Glenmont NY (US)

Koichi Motoyama of Clifton Park NY (US)

MRAM DEVICE WITH OCTAGON PROFILE - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240135978 titled 'MRAM DEVICE WITH OCTAGON PROFILE

Simplified Explanation

The patent application describes a magnetic tunnel junction cell with a unique cross-section featuring vertically aligned layers of a top electrode, a free layer, a tunneling barrier, a reference layer, and a bottom electrode with tapered side surfaces. The reference layer has a vertical side surface perpendicular to the upper horizontal surface of the bottom electrode, while the free layer and tunneling barrier have tapered side surfaces of the same angle, with a width at the upper surface less than the width at the lower surface.

  • Bottom electrode with tapered side surface:
 - Tapered side surface with width at upper surface greater than at lower surface.
  • Reference layer with vertical side surface:
 - Vertical side surface perpendicular to upper surface of bottom electrode.
  • Free layer and tunneling barrier with tapered side surfaces:
 - Tapered side surfaces of the same angle.
 - Width at upper surface less than width at lower surface.

Potential Applications: This technology could be used in magnetic storage devices, magnetic sensors, and spintronic devices.

Problems Solved: This innovation helps improve the efficiency and performance of magnetic tunnel junction cells by optimizing the structure of the layers involved.

Benefits: Enhanced data storage capabilities, increased sensitivity in magnetic sensors, and improved functionality in spintronic devices.

Potential Commercial Applications: "Advanced Magnetic Tunnel Junction Cell Technology for Next-Generation Devices"

Possible Prior Art: Prior art may include patents or publications related to magnetic tunnel junction cells with different layer structures or configurations.

Unanswered Questions: 1. How does the specific angle of the tapered side surfaces impact the performance of the magnetic tunnel junction cell? 2. Are there any limitations or challenges in manufacturing magnetic tunnel junction cells with this unique cross-section design?


Original Abstract Submitted

a magnetic tunnel junction cell, a cross section with octagon profile, vertically aligned layers of a top electrode, a free layer, a tunneling barrier, a reference layer, a bottom electrode with tapered side surface with a width at an upper surface greater than a width at a lower surface, the reference layer with vertical side surface perpendicular to an upper horizontal surface of the bottom electrode, the free layer and the tunneling barrier, each include a tapered side surface of the same angle, and each include a width at an upper surface less than a width at a lower surface. forming a bottom electrode of a magnetic tunnel junction cell with a tapered side surface with a width at an upper surface greater than a width at a lower surface, forming a reference layer with vertical side surface perpendicular to an upper surface of the bottom electrode.

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