Abstract:
The present invention provides a method for fabricating a ferroelectric memory device to reduce manufacturing cost and to obtain the electric characteristic of capacitor. The method comprises the steps of: forming an intermetal insulating layer provided with a contact hole exposing a junction region formed on a semiconductor layer having the junction region; forming a contact plug within the contact hole; forming a barrier layer and a metal layer for lower electrode on the intermetal insulating layer successively; forming a lower electrode by patterning selected portions of the metal layer for lower electrode and the barrier layer; forming a high dielectric layer on the substrate on which the lower electrode is formed; and forming an upper electrode on the high dielectric layer, wherein during forming the upper electrode, an F ion layer to be trapped by dangling bonds formed at an interface between the upper electrode and the high dielectric layer, is formed at the interface.
Abstract:
A method for fabricating a semiconductor device includes providing a substrate having a bulb-type recessed region, forming a gate insulating layer over the bulb-type recessed region and the substrate, and forming a gate conductive layer over the gate insulating layer. The gate conductive layer fills the bulb-type recessed region. The gate conductive layer includes two or more conductive layers and a discontinuous interface between the conductive layers.
Abstract:
A nonvolatile memory device includes a channel protruding in a vertical direction from a substrate, a plurality of interlayer dielectric layers and gate electrode layers which are alternately stacked over the substrate along the channel, and a memory layer formed between the channel and a stacked structure of the interlayer dielectric layers and gate electrode layers. Two or more gate electrode layers of the plurality of gate electrode layers are coupled to an interconnection line to form a selection transistor.
Abstract:
A non-volatile memory device includes a pair of columnar cell channels vertically extending from a substrate, a doped pipe channel arranged to couple lower ends of the pair of columnar cell channels, insulation layers over the substrate in which the doped pipe channel is buried, memory layers arranged to surround side surfaces of the columnar cell channels, and control gate electrodes arranged to surround the memory layers.
Abstract:
The present invention relates to a method of fabricating a flash memory device. According to a method of fabricating a flash memory device in accordance with an aspect of the present invention, a semiconductor substrate over which a tunnel insulating layer and a first conductive layer are formed is provided. A first oxide layer is formed on the first conductive layer using a plasma oxidization process in a state where a back bias voltage is applied. A nitride layer is formed on the first oxide layer. A second oxide layer is formed on the nitride layer. A second conductive layer is formed on the second oxide layer.
Abstract:
The present invention relates generally to a method of fabricating a flash memory device. The method includes forming a tunnel dielectric layer on a semiconductor substrate using a plasma oxidization process. The tunnel dielectric layer is formed using the plasma oxidation process employing Ar and O2 gases, therefore, defect charges can be prevented from being created due to dangling bonds such as Si—H. Accordingly, the shift of the threshold voltage (Vth) of a device can be reduced and cycling and charge retention characteristics can be improved.
Abstract:
A capacitor with a nano-composite dielectric layer and a method for fabricating the same are provided. A dielectric layer of a capacitor includes a nano-composite layer formed by mixing X number of different sub-layers, X being a positive integer greater than approximately 1. A method for forming a dielectric layer of a capacitor includes: forming a nano-composite layer by mixing X number of different sub-layers in the form of a nano-composition, X being a positive integer greater than approximately 1; and densifying the nano-composite layer.
Abstract:
The present invention relates to a method of forming a dielectric layer of a flash memory device. In a process of forming a dielectric layer of a flash memory device, the dielectric layer may include a first oxide layer, a high dielectric layer, and a second oxide layer is formed. Accordingly, a leakage current characteristic and reliability of the flash memory device can be improved.
Abstract:
A capacitor with a nano-composite dielectric layer and a method for fabricating the same are provided. A dielectric layer of a capacitor includes a nano-composite layer formed by mixing X number of different sub-layers, X being a positive integer greater than approximately 1. A method for forming a dielectric layer of a capacitor includes: forming a nano-composite layer by mixing X number of different sub-layers in the form of a nano-composition, X being a positive integer greater than approximately 1; and densifying the nano-composite layer.
Abstract:
A method for forming a thin film by using an atomic layer deposition (ALD) method and a method for fabricating a capacitor using the same includes: supplying a source gas, a reaction gas, and a purge gas, then discontinuing the supply of the reaction gas and the source gas, followed by supplying and then discontinuing the supply of the reaction gas, wherein supplying the source gas, the reaction gas, and the purge gas, then discontinuing the supply of the reaction gas and the source gas, followed by supplying and then discontinuing the supply of the reaction gas constitutes a unit cycle, and repeating the unit cycle until a thin film having a desired thickness is deposited.