摘要:
Embodiments of the invention relate generally to semiconductors and semiconductor fabrication techniques, and more particularly, to devices, integrated circuits, substrates, wafers and methods to form barrier structures to facilitate formation of silicon carbide epitaxy on a substrate, such as a silicon-based substrate, for fabricating various silicon carbide-based semiconductor devices, including silicon carbide-based memory elements and cells. In some embodiments, a semiconductor wafer includes a silicon substrate, a barrier-seed layer disposed over the silicon substrate, and a silicon carbide layer formed over the barrier-seed layer. The semiconductor wafer can be used to form a variety of SiC-based semiconductor devices. In one embodiment, a silicon carbide-based memory element is formed to include barrier-seed layer, multiple silicon carbide layers formed over the barrier-seed layer, and a dielectric layer formed over the multiple silicon carbide layers.
摘要:
Embodiments of the invention relate generally to semiconductors and semiconductor fabrication techniques, and more particularly, to devices, integrated circuits, substrates, and methods to form silicon carbide structures, including doped epitaxial layers (e.g., P-doped silicon carbide epitaxial layers), by supplying sources of silicon and carbon with sequential emphasis. In some embodiments, a method of forming an epitaxial layer of silicon carbide can include depositing a layer in the presence of a silicon source, and purging gaseous materials subsequent to depositing the layer. Further, the method can include converting the layer into a sub-layer of silicon carbide in the presence of a carbon source and a dopant, and purging other gaseous materials. In some embodiments, the presence of the silicon source can be independent of the presence of the carbon source and/or the dopant.
摘要:
Embodiments of the invention relate generally to semiconductors and semiconductor fabrication techniques, and more particularly, to devices, integrated circuits, substrates, wafers and methods to form film structures to facilitate formation of silicon carbide epitaxy on a substrate, such as a silicon-based substrate. In some embodiments, a method of preparing a substrate for silicon carbide epitaxial layer formation can include forming an ultrathin layer of oxide that is configured to inhibit contaminants from interacting with a silicon-based substrate. Further, the method can include forming a carbonized film on the silicon-based substrate that is configured to inhibit contaminants from interacting with the silicon-based substrate. The carbonized film can be configured to be transitory as fabrication parameters are modified to form an epitaxial layer of silicon carbide.
摘要:
Embodiments of the invention relate generally to semiconductors and semiconductor fabrication techniques, and more particularly, to devices, integrated circuits, substrates, and methods to form silicon carbide structures, including epitaxial layers, by supplying sources of silicon and carbon with sequential emphasis. In at least some embodiments, a method of forming an epitaxial layer of silicon carbide can include depositing a layer on a substrate in the presence of a silicon source, and purging gaseous materials subsequent to depositing the layer. Further, the method can include converting the layer into a sub-layer of silicon carbide in the presence of a carbon source, and purging other gaseous materials subsequent to converting the layer. The presence of the silicon source can be independent of the presence of the carbon source. In some embodiments, dopants, such as n-type dopants, can be introduced during the formation of the epitaxial layer of silicon carbide.
摘要:
The present invention provides a method for treating autism. The method comprises following steps: step 1, applying a first electrical current stimulation of 30 minutes in the vicinity of the Hegu acupuncture point and the Nei guan acupuncture point at one side of the patient, wherein the first electrical current stimulation has a first slow-quick waveform, and the maximum current of the first electrical current stimulation is 3-10 mA; and step 2, applying a second electrical current stimulation of 30 minutes in the vicinity of the Zusanli acupuncture point, and the Sanyinjiao acupuncture point at opposite side of the patient, wherein the second electrical current stimulation has a second slow-quick waveform, and the maximum current of the second electrical current stimulation is 4-15 mA. The above-mentioned method may actually aim at the etiology in the biological and medical aspects, and results in actual therapeutic significance. In the course of treatment, the above-mentioned method is not found to have any side effects, so it can be used for a long time. The present method of the present application is non-invasive and painless, and it is acceptable for children, and suitable for family use. The method can obviously improve the symptoms of autism. The clinical manifestations is an increase of passive and active language, an improvement of social interaction-ability, emotion becoming stable, a better sleep (sleep quickly, a long time). In addition, the method is simple and do not need an acupuncturist.
摘要:
The present invention provides a method for treating autism. The method comprises following steps: step 1, applying a first electrical current stimulation of 30 minutes in the vicinity of the Hegu acupuncture point and the Nei guan acupuncture point at one side of the patient, wherein the first electrical current stimulation has a first slow-quick waveform, and the maximum current of the first electrical current stimulation is 3-10 mA; and step 2, applying a second electrical current stimulation of 30 minutes in the vicinity of the Zusanli acupuncture point, and the Sanyinjiao acupuncture point at opposite side of the patient, wherein the second electrical current stimulation has a second slow-quick waveform, and the maximum current of the second electrical current stimulation is 4-15 mA. The above-mentioned method may actually aim at the etiology in the biological and medical aspects, and results in actual therapeutic significance. In the course of treatment, the above-mentioned method is not found to have any side effects, so it can be used for a long time. The present method of the present application is non-invasive and painless, and it is acceptable for children, and suitable for family use. The method can obviously improve the symptoms of autism. The clinical manifestations is an increase of passive and active language, an improvement of social interaction-ability, emotion becoming stable, a better sleep (sleep quickly, a long time). In addition, the method is simple and do not need an acupuncturist.