摘要:
In the method of programming a phase change memory cell, having a lower resistive state and a higher resistive state, to the lower resistive state, the memory cell is heated to first temperature. Subsequently, the memory cell is heated to second temperature, which is greater than the first temperature.
摘要:
A phase-changeable memory device includes a substrate having a contact region on an upper surface thereof. An insulating interlayer on the substrate has an opening therein, and a lower electrode is formed in the opening. The lower electrode has a nitrided surface portion and is in electrical contact with the contact region of the substrate. A phase-changeable material layer pattern is on the lower electrode, and an upper electrode is on the phase-changeable material layer pattern. The insulating interlayer may have a nitrided surface portion and the phase-changeable material layer may be at least partially on the nitrided surface portion of the insulating interlayer. A nitride layer may be formed on the insulating interlayer. The lower electrode may have a nitrided surface portion and the phase-changeable material layer may be at least partially on the nitrided surface portion of the lower electrode. Methods of forming phase-changeable memory devices are also disclosed.
摘要:
Provided is a method for fabricating a semiconductor device. The method includes forming an interlayer insulating layer on a substrate, the interlayer insulating layer including a first trench; forming a high-k dielectric layer in the first trench; successively forming a diffusion layer and a blocking layer on the high-k dielectric layer; subsequently performing annealing; after the annealing, successively removing the blocking layer and the diffusion layer; forming a first barrier layer on the high-k dielectric layer; successively forming a work function adjustment layer and a gate conductor on the first barrier layer; and forming a capping layer on the gate conductor.
摘要:
In a method of forming a chalcogenide compound target, a first powder including germanium carbide or germanium is prepared, and a second powder including antimony carbide or antimony is prepared. A third powder including tellurium carbide or tellurium is prepared. A powder mixture is formed by mixing the first to the third powders. After a shaped is formed body by molding the powder mixture. The chalcogenide compound target is obtained by sintering the powder mixture. The chalcogenide compound target may include a chalcogenide compound that contains carbon and metal, or carbon, metal and nitrogen considering contents of carbon, metal and nitrogen, so that a phase-change material layer formed using the chalcogenide compound target may stable phase transition, enhanced crystallized temperature and increased resistance. A phase-change memory device including the phase-change material layer may have reduced set resistance and driving current while improving durability and sensing margin.
摘要:
A nonvolatile memory device, including a lower electrode on a semiconductor substrate, a phase change material pattern on the lower electrode, an adhesion pattern on the phase change material pattern and an upper electrode on the adhesion pattern, wherein the adhesion pattern includes a conductor including nitrogen.
摘要:
A phase-changeable memory device includes a phase-changeable material pattern and first and second electrodes electrically connected to the phase-changeable material pattern. The first and second electrodes are configured to provide an electrical signal to the phase-changeable material pattern. The phase-changeable material pattern includes a first phase-changeable material layer and a second phase-changeable material layer. The first and second phase-changeable material patterns have different chemical, physical, and/or electrical characteristics. For example, the second phase-changeable material layer may have a greater resistivity than the first phase-changeable material layer. For instance, the first phase-changeable material layer may include nitrogen at a first concentration, and the second phase-changeable material layer may include nitrogen at a second concentration that is greater than the first concentration. Related devices and fabrication methods are also discussed.
摘要:
A phase-changeable memory device includes a substrate having a contact region on an upper surface thereof. An insulating interlayer on the substrate has an opening therein, and a lower electrode is formed in the opening. The lower electrode has a nitrided surface portion and is in electrical contact with the contact region of the substrate. A phase-changeable material layer pattern is on the lower electrode, and an upper electrode is on the phase-changeable material layer pattern. The insulating interlayer may have a nitrided surface portion and the phase-changeable material layer may be at least partially on the nitrided surface portion of the insulating interlayer. Methods of forming phase-changeable memory devices are also disclosed.
摘要:
A resistance variable memory device includes at least one bottom electrode, a first insulating layer containing a trench which exposes the at least one bottom electrode, and a resistance variable material layer including respective first and second portions located on opposite sidewalls of the trench, respectively, where the first and second portions of the resistance variable material layer are electrically connected to the at least one bottom electrode. The device further includes a protective layer covering the resistance variable material layer within the trench, and a second insulating layer located within the trench and covering the protective layer within the trench
摘要:
Phase-changeable memory devices include a lower electrode electrically connected to an impurity region of a transistor in a substrate and a programming layer pattern including a first phase-changeable material on the lower electrode. An adiabatic layer pattern including a material having a lower thermal conductivity than the first phase-changeable material is on the programming layer pattern and an upper electrode is on the adiabatic layer pattern.
摘要:
In one embodiment, a phase-change memory device has an oxidation barrier layer to protect against memory cell contamination or oxidation and a method of manufacturing the same. In one embodiment, a semiconductor memory device comprises a molding layer overlying a semiconductor substrate. The molding layer has a protrusion portion vertically extending from a top surface thereof. The device further includes a phase-changeable material pattern adjacent the protrusion portion and a lower electrode electrically connected to the phase-changeable material pattern.