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US 2019/0355661 A1Published application
Beol embedded high density vertical resistor structure
AssigneeInternational Business Machines Corporation
InventorsAlexander Reznicek, Oscar van der Straten, Praneet Adusumilli
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Abstract
Embedded resistors which have tunable resistive values located between interconnect levels are provided. The embedded resistors have a pillar structure, i.e., they have a height that is greater than their width, thus they occupy less real estate as compared with conventional planar resistors that are typically employed in BEOL technology.
Claims20
A method of forming a semiconductor structure, the method comprising:
- forming a lower interconnect level that includes at least one first metal-containing structure embedded in a first interconnect dielectric material layer;
- forming a plurality of spaced apart mandrel structures above the lower interconnect level;
- forming a resistor material pillar on opposing sidewall surfaces of each of the mandrel structures;
- removing each mandrel structure;
- forming a dielectric material layer between each resistor material pillar;
- and
- forming an upper interconnect level that includes at least one second metal-containing structure located in a second interconnect dielectric material layer, wherein at least one of the resistor material pillars contacts both the first and second metal-containing structures.
4 more elements
Dependencies are inferred from the claim text.