Trapezoidal interconnect at tight beol pitch

    公开(公告)号:GB2603346A

    公开(公告)日:2022-08-03

    申请号:GB202204025

    申请日:2020-08-14

    Applicant: IBM

    Abstract: Techniques for forming trapezoidal-shaped interconnects are provided. In one aspect, a method for forming an interconnect structure includes: patterning a trench(es) in a dielectric having a V-shaped profile with a rounded bottom; depositing a liner into the trench(es) using PVD which opens-up the trench(es) creating a trapezoidal-shaped profile in the trench(es); removing the liner from the trench(es) selective to the dielectric whereby, following the removing, the trench(es) having the trapezoidal-shaped profile remains in the dielectric; depositing a conformal barrier layer into and lining the trench(es) having the trapezoidal-shaped profile; depositing a conductor into and filling the trench(es) having the trapezoidal-shaped profile over the conformal barrier layer; and polishing the conductor and the conformal barrier layer down to the dielectric. An interconnect structure is also provided.

    Trapezoidal interconnect at tight beol pitch

    公开(公告)号:GB2603346B

    公开(公告)日:2023-12-20

    申请号:GB202204025

    申请日:2020-08-14

    Applicant: IBM

    Abstract: Techniques for forming trapezoidal-shaped interconnects are provided. In one aspect, a method for forming an interconnect structure includes: patterning a trench(es) in a dielectric having a V-shaped profile with a rounded bottom; depositing a liner into the trench(es) using PVD which opens-up the trench(es) creating a trapezoidal-shaped profile in the trench(es); removing the liner from the trench(es) selective to the dielectric whereby, following the removing, the trench(es) having the trapezoidal-shaped profile remains in the dielectric; depositing a conformal barrier layer into and lining the trench(es) having the trapezoidal-shaped profile; depositing a conductor into and filling the trench(es) having the trapezoidal-shaped profile over the conformal barrier layer; and polishing the conductor and the conformal barrier layer down to the dielectric. An interconnect structure is also provided.

    Wraparound top electrode line for crossbar array resistive switching device

    公开(公告)号:GB2581082B

    公开(公告)日:2022-07-06

    申请号:GB202005861

    申请日:2018-11-01

    Applicant: IBM

    Abstract: A method is presented for forming a semiconductor device. The method includes depositing an insulating layer over a semiconductor substrate, etching the insulating layer to form a plurality of trenches for receiving a first conducting material, forming a resistive switching memory element over at least one trench of the plurality of trenches, the resistive switching memory element having a conducting cap formed thereon, and depositing a dielectric cap over the trenches. The method further includes etching portions of the insulating layer to expose a section of the dielectric cap formed over the resistive switching memory element, etching the exposed section of the dielectric cap to expose the conducting cap of the resistive switching memory element, and forming a barrier layer in direct contact with the exposed section of the conducting cap.

    Encapsulation topography-assisted self-aligned MRAM top contact

    公开(公告)号:GB2601100A

    公开(公告)日:2022-05-18

    申请号:GB202204077

    申请日:2020-09-08

    Applicant: IBM

    Abstract: A method for forming an MRAM device includes: forming MTJs (202) on interconnects (106) embedded in a first dielectric (102); depositing an encapsulation layer (204) over the MTJs (202); burying the MTJs (202) in a second dielectric (206); patterning a trench (302') in the second dielectric (206) over the MTJs (202) exposing the encapsulation layer (204) over tops of the MTJs (202) which creates a topography at the trench (302') bottom; forming a metal line (904) in the trench (302') over the topography; recessing the metal line (904) which breaks up the metal line (904) into segments (904a, 904b) separated by exposed peaks of the encapsulation layer (204); recessing the exposed peaks of the encapsulation layer (204) to form recesses at the tops of the MTJs (202); and forming self-aligned contacts (1202) in the recesses. An MRAM device is also provided.

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