Abstract: Integrated circuit devices may include two transistor stacks including lower transistors having different threshold voltages and upper transistors having different threshold voltages. Gate insulators of the lower transistors may have different dipole elements or different areal densities of dipole elements, and the upper transistors may have different gate electrode structures.

Abstract: A semiconductor device includes a substrate including an upper surface and a lower surface that are opposite to each other in a first direction, an active pattern which is on the upper surface of the substrate and extends in a second direction, a gate electrode which is on the active pattern and extends in a third direction, a first source/drain pattern which is connected to the active pattern on the upper surface of the substrate, and includes a lower epitaxial region and an upper epitaxial region, the upper epitaxial region including an epitaxial recess, and the lower epitaxial region being inside the epitaxial recess, a first source/drain contact, which is connected to the first source/drain pattern and extends into the substrate, and a contact silicide layer, which is between the first source/drain contact and the first source/drain pattern and contacts the lower epitaxial region.

Abstract: Integrated circuit devices may include two transistor stacks including lower transistors having different threshold voltages and upper transistors having different threshold voltages. Gate insulators of the lower transistors may have different dipole elements or different areal densities of dipole elements, and the upper transistors may have different gate electrode structures.

Abstract: A decorative picture mirror is provided. The picture mirror includes a smooth mirror surface. A coating layer is provided on a back portion of the mirror surface, wherein the coating layer covers a select local part of the backside of the mirror surface leaving an uncovered portion of the backside of the mirror surface. A medium including a graphic pattern is connected to the backside of the mirror surface, wherein the graphic pattern substantially fully covers the uncovered portion of the backside of the mirror surface, whereby the coating layer and the graphic pattern form substantially continuous coverage on the select local part of the backside of the mirror surface.

Abstract: A decorative picture mirror is provided. The picture mirror includes a smooth mirror surface. A coating layer is provided on a back portion of the mirror surface, wherein the coating layer covers a select local part of the backside of the mirror surface leaving an uncovered portion of the backside of the mirror surface. A medium including a graphic pattern is connected to the backside of the mirror surface, wherein the graphic pattern substantially fully covers the uncovered portion of the backside of the mirror surface, whereby the coating layer and the graphic pattern form substantially continuous coverage on the select local part of the backside of the mirror surface.

Abstract: Disclosed is a combination hood microwave oven, by which a room environment is maintained more pleasant and fresh by proving a microwave oven with an air curtain generating unit for preventing polluted air, which includes hot, smelling, or humid air produced from an oven range on cooking, from diffusing into a room. The present invention includes a cabinet disposed over an oven range, a cooking room having a predetermined cavity within the cabinet for cooking using an electromagnetic wave generated from a magnetron, a hood unit installed within the cabinet to discharge polluted air produced from the oven range on cooking, and an air curtain generating unit installed at a bottom side of the cabinet to prevent the polluted air from diffusing into a room.