摘要:
A phase changeable memory unit includes a lower electrode, an insulating interlayer structure having an opening, a phase changeable material layer and an upper electrode. The lower electrode is formed on a substrate. The insulating interlayer structure has an opening and is formed on the lower electrode and the substrate. The opening exposes the lower electrode and has a width gradually decreasing downward. The phase changeable material layer fills the opening and partially covers an upper face of the insulating interlayer structure. The upper electrode is formed on the phase changeable material layer.
摘要:
A phase changeable memory unit includes a lower electrode, an insulating interlayer structure having an opening, a phase changeable material layer and an upper electrode. The lower electrode is formed on a substrate. The insulating interlayer structure has an opening and is formed on the lower electrode and the substrate. The opening exposes the lower electrode and has a width gradually decreasing downward. The phase changeable material layer fills the opening and partially covers an upper face of the insulating interlayer structure. The upper electrode is formed on the phase changeable material layer.
摘要:
A contact structure that includes a first pattern formed on a substrate, wherein the first pattern has a recessed region in an upper surface thereof, a planarized buffer pattern formed on the first pattern, and a conductive pattern formed on the planarized buffer pattern.
摘要:
A contact structure that includes a first pattern formed on a substrate, wherein the first pattern has a recessed region in an upper surface thereof, a planarized buffer pattern formed on the first pattern, and a conductive pattern formed on the planarized buffer pattern.
摘要:
Provided is a phase change memory device. The phase change memory device includes a first electrode and a second electrode. A phase change material pattern is interposed between the first and second electrodes. A phase change auxiliary pattern is in contact with at least one side of the phase change material pattern. The phase change auxiliary pattern includes a compound having a chemical formula expressed as DaMb[GxTy]c(0≦a/(a+b+c)≦0.2, 0≦b/(a+b+c)≦0.1, 0.3≦x/(x+y)≦0.7), where D comprises: at least one of C, N, and O; M comprises at least one of a transition metal, Al, Ga, and In; G comprises Ge; and T comprises Te.
摘要翻译:提供了一种相变存储器件。 相变存储器件包括第一电极和第二电极。 相变材料图案插入在第一和第二电极之间。 相变辅助图案与相变材料图案的至少一侧接触。 相变辅助图案包括化学式表示为DaMb [GxTy] c(0 <= a /(a + b + c)<= 0.2,0 <= b /(a + b + c) 0.1,0.3 <= x /(x + y)≤= 0.7),其中D包括:C,N和O中的至少一个; M包括过渡金属Al,Ga和In中的至少一种; G包括Ge; T包括Te。
摘要:
A method of fabricating a phase change memory device includes forming an opening in a first layer, forming a phase change material in the opening and on the first layer, heating the phase change material to a first temperature that is sufficient to reflow the phase change material in the opening, wherein the first temperature is less than a melting point of the phase change material, and, after heating the phase change material to the first temperature, patterning the phase change material to define a phase change element in the opening.
摘要:
A phase-change memory unit includes a lower electrode on a substrate, a phase-change material layer pattern including germanium-antimony-tellurium (GST) and carbon on the lower electrode, a transition metal layer pattern on the phase-change material layer pattern, and an upper electrode on the first transition metal layer pattern. The phase-change memory unit may have good electrical characteristics.
摘要:
A phase change memory cell includes an interlayer insulating layer formed on a semiconductor substrate, and a first electrode and a second electrode disposed in the interlayer insulating layer. A phase change material layer is disposed between the first and second electrodes. The phase change material layer may be an undoped GeBiTe layer, a doped GeBiTe layer containing an impurity or a doped GeTe layer containing an impurity. The undoped GeBiTe layer has a composition ratio within a range surrounded by four points (A1(Ge21.43, Bi16.67, Te61.9), A2(Ge44.51, Bi0.35, Te55.14), A3(Ge59.33, Bi0.5, Te40.17) and A4(Ge38.71, Bi16.13, Te45.16)) represented by coordinates on a triangular composition diagram having vertices of germanium (Ge), bismuth (Bi) and tellurium (Te). The doped GeBiTe layer contains an impurity and has a composition ratio within a range surrounded by four points (D1(Ge10, Bi20, Te70), D2(Ge30, Bi0, Te70), D3(Ge70, Bi0, Te30) and D4(Ge50, Bi20, Te30)) represented by coordinates on the triangular composition diagram.
摘要:
A phase change memory cell includes an interlayer insulating layer formed on a semiconductor substrate, and a first electrode and a second electrode disposed in the interlayer insulating layer. A phase change material layer is disposed between the first and second electrodes. The phase change material layer may be an undoped GeBiTe layer, a doped GeBiTe layer containing an impurity or a doped GeTe layer containing an impurity. The undoped GeBiTe layer has a composition ratio within a range surrounded by four points (A1(Ge21.43, Bi16.67, Te61.9), A2(Ge44.51, Bi0.35, Te55.14), A3(Ge59.33, Bi0.5, Te40.17) and A4(Ge38.71, Bi16.13, Te45.16)) represented by coordinates on a triangular composition diagram having vertices of germanium (Ge), bismuth (Bi) and tellurium (Te). The doped GeBiTe layer contains an impurity and has a composition ratio within a range surrounded by four points (D1(Ge10, Bi20, Te70), D2(Ge30, Bi0, Te70), D3(Ge70, Bi0, Te30) and D4(Ge50, Bi20, Te30)) represented by coordinates on the triangular composition diagram.
摘要:
A phase change structure includes a first phase change material layer pattern and a second phase change material layer pattern. The first phase change material layer pattern may partially fill a minute structure, and the second phase change material layer pattern may fully fill the minute structure. The first phase change material layer pattern may include a first phase change material, and the second phase change material layer pattern may include a second phase change material having a composition substantially different from a composition of the first phase change material.