Patent ID: 11955379
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method, comprising:
forming a first layer of a metal adhesion layer over a bottom of a trench and over a sidewall of the trench;
increasing, using a plasma, a (111) phase of the first layer;
forming a second layer of the metal adhesion layer on the first layer;
increasing, using the plasma, a (111) phase of the second layer,
wherein the (111) phase of at least one of the first layer or the second layer is increased from being equal to a (200) phase of the at least one of the first layer or second layer, or from being less than the (200) phase of the at least one of the first layer or the second layer, to being greater than the (200) phase of the at least one of the first layer or the second layer,
wherein the (111) phase of the at least one of the first layer or the second layer being greater than the (200) phase of the at least one of the first layer or the second layer promote adhesion between the metal adhesion layer and a metal plug; and

forming the metal plug in the trench over the first layer and the second layer of the metal adhesion layer.