Abstract:
A plasma etching apparatus includes an etching chamber and at least one processor. The etching chamber is configured to support a target therein. The at least one processor is configured to: determine a process condition for plasma etching the target before execution of a plasma etching process; and control an aspect of the chamber according to the process condition. The process condition includes a unit etching time over which the plasma etching process is to be continuously performed.
Abstract:
Three dimensional semiconductor memory devices and methods of fabricating the same are provided. According to the method, sacrificial layers and insulating layers are alternately and repeatedly stacked on a substrate, and a cutting region penetrating an uppermost sacrificial layer of the sacrificial layers is formed. The cutting region is filled with a non sacrificial layer. The insulating layers and the sacrificial layers are patterned to form a mold pattern. The mold pattern includes insulating patterns, sacrificial patterns, and the non sacrificial layer in the cutting region. The sacrificial patterns may be replaced with electrodes. The related semiconductor memory device is also provided.
Abstract:
A plasma etching apparatus includes an etching chamber and at least one processor. The etching chamber is configured to support a target therein. The at least one processor is configured to: determine a process condition for plasma etching the target before execution of a plasma etching process; and control an aspect of the chamber according to the process condition. The process condition includes a unit etching time over which the plasma etching process is to be continuously performed.
Abstract:
A non-volatile memory device comprises a substrate, a mold structure that includes gate electrodes stacked on the substrate and mold insulating layers alternately stacked with the gate electrodes, a cell contact on the substrate, wherein the cell contact is electrically connected to a selection gate electrode of the gate electrodes and is not electrically connected to a non-selection gate electrode of the gate electrodes, an insulating ring on the substrate, wherein the insulating ring is between the non-selection gate electrode and a sidewall of the cell contact and is in contact with the non-selection gate electrode, and a high dielectric constant layer between respective ones of the gate electrodes and the mold insulating layers, wherein the insulating ring includes a first portion that overlaps the high dielectric constant layer in a vertical direction, and a second portion that does not overlap the high dielectric constant layer in the vertical direction.
Abstract:
The present disclosure herein relates to methods of forming conductive patterns and to methods of manufacturing semiconductor devices using the same. In some embodiments, a method of forming a conductive pattern includes forming a first conductive layer and a second conductive layer on a substrate. The first conductive layer and the second conductive layer may include a metal nitride and a metal, respectively. The first conductive layer and the second conductive layer may be etched using an etchant composition that includes phosphoric acid, nitric acid, an assistant oxidant and a remainder of water. The etchant composition may have substantially the same etching rate for the metal nitride and the metal.
Abstract:
A plasma etching apparatus includes an etching chamber and at least one processor. The etching chamber is configured to support a target therein. The at least one processor is configured to: determine a process condition for plasma etching the target before execution of a plasma etching process; and control an aspect of the chamber according to the process condition. The process condition includes a unit etching time over which the plasma etching process is to be continuously performed.
Abstract:
The present disclosure herein relates to methods of forming conductive patterns and to methods of manufacturing semiconductor devices using the same. In some embodiments, a method of forming a conductive pattern includes forming a first conductive layer and a second conductive layer on a substrate. The first conductive layer and the second conductive layer may include a metal nitride and a metal, respectively. The first conductive layer and the second conductive layer may be etched using an etchant composition that includes phosphoric acid, nitric acid, an assistant oxidant and a remainder of water. The etchant composition may have substantially the same etching rate for the metal nitride and the metal.
Abstract:
A plasma etching apparatus includes an etching chamber and at least one processor. The etching chamber is configured to support a target therein. The at least one processor is configured to: determine a process condition for plasma etching the target before execution of a plasma etching process; and control an aspect of the chamber according to the process condition. The process condition includes a unit etching time over which the plasma etching process is to be continuously performed.