Patent ID: 9691778
Date: 2017-06-27
CPC Classifications: H01L

Claim:
1. A method of making multi-level contacts, comprising: providing an in-process multilevel device comprising a device region and a contact region comprising a stack of plurality of alternating sacrificial layers and insulating layers located over a major surface of a substrate; forming a plurality of contact openings extending substantially perpendicular to the major surface of the substrate to the plurality of sacrificial layers, wherein each of the plurality of contact openings extends through the stack to a respective one of the sacrificial layers; selectively removing the sacrificial layers from the stack to form a plurality of recesses extending substantially parallel to the major surface of the substrate between the insulating layers; and depositing a plurality of electrically conductive via contacts in the plurality of the contact openings and a plurality of electrically conductive electrodes in the plurality of recesses in one deposition step.