Abstract: A semiconductor device includes: a semiconductor device, comprising: a bit line structure including a bit line contact plug, a bit line, and a bit line hard mask that are sequentially stacked over a substrate; a storage node contact plug that is spaced apart from the bit line structure; a conformal spacer that is positioned between the bit line and the storage node contact plug and includes a low-k material; and a seed liner that is positioned between the conformal spacer and the bit line and thinner than the conformal spacer.

Abstract: The present disclosure relates to a plurality of host materials, organic electroluminescent compounds, and organic electroluminescent devices comprising the same. By comprising specific combinations of compounds according to the present disclosure as the plurality of host materials or by comprising a compound according to the present disclosure, it is possible to provide organic electroluminescent devices having improved lifespan characteristics compared to conventional organic electroluminescent devices.

Abstract: The present disclosure relates to a plurality of host materials, an organic electroluminescent compound, and an organic electroluminescent device comprising the same. An organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifespan properties compared to a conventional organic electroluminescent device can be provided by including the specific combination of compounds according to the present disclosure as a plurality of host materials or by including the compound according to the present disclosure.

Abstract: A preparation process of 5-ethylidene-2-norbornene, including: introducing dicyclopentadiene into a dicyclopentadiene decomposition reactor to thermally decompose the dicyclopentadiene; introducing a product of the above step into a cyclopentadiene purification tower; introducing 1,3-butadiene, a solvent, and cyclopentadiene separated from the top of the cyclopentadiene purification tower into a Diels-Alder reactor to react the same; introducing a product of the immediate above step into a 1,3-butadiene removal tower to recover 1,3-butadiene from the top; introducing a mixture at the bottom of the 1,3-butadiene removal tower into a desolvation tower, and recycling a solvent and unreacted raw materials recovered from the top of the desolvation tower to the dicyclopentadiene decomposition reactor; introducing a mixture at the bottom of the desolvation tower into a 5-vinyl-2-norbornene separation tower to separate 5-vinyl-2-norbornene; and introducing the 5-vinyl-2-norbornene into an isomerization reactor to rea

Abstract: The present disclosure relates to a plurality of host materials comprising a first host material comprising at least one compound represented by formula 1 and a second host material comprising at least one compound represented by formula 2, and an organic electroluminescent device comprising the same. An organic electroluminescent device having significantly improved lifetime properties is provided by comprising a specific combination of compounds according to the present disclosure as host materials.

Abstract: The present invention relates to a composition for regulating the differentiation of osteoclasts, and is very effective in preventing or treating bone-related diseases by effectively maintaining bone homeostasis by regulating bone metabolism, particularly the differentiation of bone marrow cells into osteoclasts.

Abstract: A compound for an organic optoelectronic device, an organic light emitting diode, and a display device including the organic light emitting diode, the compound being represented by the following Chemical Formula 1:

Abstract: A compound for an organic optoelectronic device, an organic light emitting diode, and a display device, the compound including moieties represented by the following Chemical Formula 1; Chemical Formula 4; and one of Chemical Formulae 2 and 3;

Abstract: A compound for an organic photoelectric device, the compound being represented by the following Chemical Formula 1:

Abstract: A compound for an optoelectronic device, an organic light emitting diode, and a display device, the compound for an optoelectronic device being represented by the following Chemical Formula 1:

Abstract: A conductive polymer, a conductive polymer composition, a conductive polymer layer, and an organic photoelectric device including the conductive polymer layer, the conductive polymer being doped with a polyacid copolymer, the polyacid copolymer being represented by the following Chemical Formula 1:

Abstract: A compound for an organic optoelectronic device, an organic light emitting diode, and a display device including the organic light emitting diode, the compound being represented by the following Chemical Formula 1:

Abstract: A compound for an organic photoelectric device is represented by the following Chemical Formula 1:

Abstract: A compound for an optoelectronic device, an organic light emitting diode, and a display device, the compound for an optoelectronic device being represented by the following Chemical Formula 1:

Abstract: A compound for an organic photoelectric device, the compound being represented by the following Chemical Formula 1:

Abstract: A conductive polymer, a conductive polymer composition, a conductive polymer layer, and an organic photoelectric device including the conductive polymer layer, the conductive polymer being doped with a polyacid copolymer, the polyacid copolymer being represented by the following Chemical Formula 1:

Abstract: A compound for an organic optoelectronic device, an organic light emitting diode, and a display device, the compound including moieties represented by the following Chemical Formula 1; Chemical Formula 4; and one of Chemical Formulae 2 and 3;

Abstract: A compound for an organic optoelectronic device, an organic light emitting diode, and a display device including the organic light emitting diode, the compound being represented by the following Chemical Formula 1: