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Metal-insulator-metal capacitor structure

  • US 10,388,718 B2
  • Filed: 09/09/2016
  • Issued: 08/20/2019
  • Est. Priority Date: 09/22/2015
  • Status: Active Grant
First Claim
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1. A method comprising:

  • forming a first gate structure having a first width dimension;

    forming a second gate structure having a second width dimension, larger than the first width dimension;

    removing material from the second gate structure to form a trench;

    forming a capacitor structure within the trench and partly outside of the trench;

    forming cap material of nitride material or a low-k dielectric material in the trench with a stepped configuration including a plurality of steps at each edge of the trench; and

    forming insulator material inside the trench formed on the cap material,wherein the forming the cap material includes forming a first step in the stepped configuration at each edge of the trench on an electrode plate within the trench and forming a second step and a third step in the stepped configuration at each edge of the trench on an electrode plate that extends outside of the trench,wherein the forming of the capacitor structure comprises;

    forming a first electrode plate on dielectric material within the trench;

    forming a dielectric layer on the first electrode plate within the trench;

    forming a second electrode plate on the dielectric layer within the trench and on insulator material formed outside of the trench;

    forming a contact in direct electrical contact with the first electrode plate within the trench; and

    forming contacts in direct electrical contact with the second electrode plate outside of the trench,wherein the first electrode plate is the electrode plate within the trench and the second electrode plate is the electrode plate that extends outside of the trench.

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