Patent ID: 11915974
Assignee: MICRON TECHNOLOGY, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 22:
23. A method used in forming a conductive via, comprising:
forming islands individually comprising conductor material and multiple different composition materials there-above, individual of the islands comprising an etch-stop material, the etch-stop material comprising at least one of (a), (b), or (c), where:
(a): the individual islands having a top material that is the etch-stop material and that is of different composition from all material that is vertically between the etch-stop material and the conductor material;
(b): the top material of the individual islands being the etch-stop material and having its top surface in a vertical cross-section extending laterally-outward beyond two opposing laterally-outermost edges of a top surface of the material that is immediately directly below the top material; and
(c): is of different composition from that of an upper portion of the conductor material and including a portion thereof that is elevationally coincident with the conductor material or that is directly against the conductor material;

forming upper-portion material directly above the islands;
etching a via opening through the upper-portion material to stop on the etch-stop material of the individual islands; and
forming an operative conductive via in the via opening that directly electrically couples with the conductor material of the individual islands.