Abstract:
A semiconductor device includes a substrate having a conductive area, a first pattern formed on the substrate and having a contact hole through which the conductive area is exposed, and a contact plug in the contact hole. The contact plug includes first and second silicon layers. The first silicon layer, formed from a first compound including at least two silicon atoms, is formed in the contact hole to contact a top surface of the conductive area and a side wall of the first pattern. The second silicon layer, formed from a second compound including a number of silicon atoms less than the number of the silicon atoms of the first compound, is formed on the first silicon layer and fills a remaining space of the contact hole, the second silicon layer being spaced apart from the first pattern at an entrance of the contact hole.
Abstract:
In a method of forming a capacitor, a seed stopper and a sacrificial layer is formed on an insulating interlayer having a plug therethrough. An opening is formed through the sacrificial layer and the seed stopper to expose the plug. A seed is formed on an innerwall of the opening. A lower electrode is formed covering the seed on the innerwall of the opening. The sacrificial layer and the seed are removed. A dielectric layer and an upper electrode are sequentially formed on the lower electrode.
Abstract:
In a gate structure and a method of forming the same, a first conductive pattern is formed on a substrate and comprises a metal-containing material. A second conductive pattern is formed on the first conductive pattern, and the second conductive pattern comprises metal and silicon. A third conductive pattern is formed on the second conductive pattern, and the third conductive pattern comprises polysilicon. A gate conductive pattern of an n-type metal-oxide semiconductor (NMOS) transistor, a p-type MOS (PMOS) transistor and a complementary MOS (CMOS) transistor includes the gate structure. The second conductive pattern is interposed between the first and third conductive patterns and the third conductive pattern is prevented from making direct contact with the first conductive pattern, so that polysilicon in the third conductive pattern is sufficiently prevented from being chemically reacted with the metal in the first conductive pattern in advance, thereby improving electrical characteristics of the transistor.
Abstract:
A semiconductor device has two transistors of different structure from each other. One of transistors is P-type and the other is N-type. One of the transistors includes a gate structure in which a polysilicon layer contacts a gate insulation film while the other transistor includes a gate structure in which a metal layer contacts a gate insulation film.
Abstract:
A method of forming transistor gate structures in an integrated circuit device can include forming a high-k gate insulating layer on a substrate including a first region to include PMOS transistors and a second region to include NMOS transistors. A polysilicon gate layer can be formed on the high-k gate insulating layer in the first and second regions. A metal silicide gate layer can be formed directly on the high-k gate insulating layer in the first region and avoiding forming the metal-silicide in the second region. Related gate structures are also disclosed.
Abstract:
An integrated circuit device includes a substrate including an active region, an interfacial layer including a lower insulating layer on the active region, the lower insulating layer doped with a chalcogen element having an atomic weight equal to or greater than 16, a gate insulation layer on the interfacial layer, and a gate electrode on the gate insulation layer.
Abstract:
Example embodiments provide a non-volatile semiconductor memory device and method of forming the same. The non-volatile memory device may include a tunnel insulation layer on a semiconductor substrate, a charge storage layer on the tunnel insulation layer, a first blocking insulation layer on the charge storage layer, and a gate electrode on the first blocking insulation layer, wherein the gate electrode includes aluminum and the first blocking insulation layer does not include aluminum.
Abstract:
A method of manufacturing a gate electrode of a MOS transistor including a tungsten carbon nitride layer is disclosed. After a high dielectric layer is formed on a substrate, a source gas including tungsten amine derivative flows onto the high dielectric layer. A tungsten carbon nitride layer is formed on the high dielectric layer by decomposing the source gas. Thereafter, a gate electrode is formed by patterning the tungsten carbon nitride layer. According to the present invention, a gate electrode having a work function of over 4.9 eV is formed.
Abstract:
In a semiconductor device with dual gates and a method of manufacturing the same, a dielectric layer and first and second metallic conductive layers are successively formed on the semiconductor substrate having first and second regions. The second metallic conductive layer which is formed on the first metallic conductive layer of the second region is etched to form a metal pattern. The first metallic conductive layer is etched using the metal pattern as an etching mask. A polysilicon layer is formed on the dielectric layer and the metal pattern. The first gate electrode is formed by etching portions of the polysilicon layer, the metal pattern, and the first metallic conductive layer of the first region. The second gate electrode is formed by etching a portion of the polysilicon layer formed directly on the dielectric layer of the second region.
Abstract:
A semiconductor device having a dual gate is formed on a substrate having a dielectric layer. A first metallic conductive layer is formed on the dielectric layer to a first thickness, and annealed to have a reduced etching rate. A second metallic conductive layer is formed on the first metallic conductive layer to a second thickness that is greater than the first thickness. A portion of the second metallic conductive layer formed in a second area of the substrate is removed using an etching selectivity. A first gate structure having a first metallic gate including the first and the second metallic conductive layers is formed in a first area of the substrate. A second gate structure having a second metallic gate is formed in the second area. A gate dielectric layer is not exposed to an etching chemical due to the first metallic conductive layer, so its dielectric characteristics are not degraded.