摘要:
The crystallization method by laser light irradiation forms a multiplicity of convexes (ridges) in the surface of an obtained crystalline semiconductor film, deteriorating film quality. Therefore, it is a problem to provide a method for forming a ridge-reduced semiconductor film and a semiconductor device using such a semiconductor film. The present invention is characterized by heating a semiconductor film due to a heat processing method (RTA method: Rapid Thermal Anneal method) to irradiate light emitted from a lamp light source after crystallizing the semiconductor film by laser light, thereby reducing the ridge.
摘要:
In a semiconductor device manufacturing method, an ion current density distribution is measured in a plasma processing apparatus. It is then ascertained whether or not the measured distribution is in compliance with an ion current density distribution that becomes a criterion.
摘要:
An implanter provides two-dimensional scanning of a substrate relative to an implant beam so that the beam draws a raster of scan lines on the substrate. The beam current is measured at turnaround points off the substrate and the current value is used to control the subsequent fast scan speed so as to compensate for the effect of any variation in beam current on dose uniformity in the slow scan direction. The scanning may produce a raster of non-intersecting uniformly spaced parallel scan lines and the spacing between the lines is selected to ensure appropriate dose uniformity.
摘要:
A method of disordering a quantum well heterostructure, including the step of irradiating the heterostructure with a particle beam, wherein the energy of the beam is such that the beam creates a substantially constant distribution of defects within the heterostructure. The irradiating particles can be ions or electrons, and the energy is preferably such that the irradiating particles pass through the heterostructure. Light ions such as hydrogen ions are preferred because they are readily available and produce substantially uniform distributions of point defects at relatively low energies. The method can be used to tune the wavelength range of an optoelectronic device including such a heterostructure, such as a photodetector.
摘要:
A reflow process is provided for multiple units which improves productivity. A reflow furnace is moved along a transport direction of a tape substrate and is fixed at a position matching the product pitch of a circuit substrate. Any of a plurality of heating blocks and cooling blocks are matched to the product pitches of the circuit substrate. By doing so, it is possible to continuously carry out the reflow process for a tape substrate on which circuit substrates having different product pitches are arranged.
摘要:
A method and system for identifying and/or removing an oxide-induced dead zone in a VCSEL structure is disclosed herein. In general, a VCSEL structure can be formed having at least one oxide layer and an oxide-induced dead zone thereof. A thermal annealing operation can then be performed upon the VCSEL structure to remove the oxide-induced dead zone, thereby permitting oxide VCSEL structures thereof to be reliably and consistently fabricated. An oxidation operation may initially be performed upon the VCSEL structure to form the oxide layer and the associated oxide-induced dead zone. The thermal annealing operation is preferably performed upon the VCSEL after performing a wet oxidation operation upon the VCSEL structure.
摘要:
A benchtop processing system utilizing a wafer receptacle for wafer processing is provided. The wafer receptacle has a plurality of sloped projections capable of receiving a plurality of wafers having different diameter sizes. The wafer receptacle is transported to a processing chamber from a wafer reception module which can also be used as a cooling module. Advantageously, the benchtop processing system and method of the present invention allows for efficient and compact wafer processing.
摘要:
The present invention provides a method for producing a nitrogen-doped annealed wafer, wherein before a wafer sliced from a silicon single crystal doped with at least nitrogen and polished is subjected to a high temperature heat treatment at 1100null C. to 1350null C. in an atmosphere of argon, hydrogen or a mixed gas thereof, a step of maintaining the wafer at a temperature lower than the treatment temperature of the high temperature heat treatment is conducted to allow growth of oxygen precipitation nuclei having such a size that the nuclei should be annihilated by the high temperature heat treatment to such a size that the nuclei should not be annihilated by the high temperature heat treatment, and then the high temperature heat treatment is performed. Thus, there are provided a nitrogen-doped annealed wafer with reducing variation of the BMD density after the annealing among silicon single crystal wafers sliced from various positions of the silicon single crystal without being affected by concentration of nitrogen doped in a silicon single crystal and a method for producing the same.
摘要:
A method and apparatus are provided for eliminating contaminants including metallic and/or hydrocarbon-containing contaminants on a surface of a semiconductor substrate by heating a semiconductor substrate which may have contaminates on the surface thereof to an elevated temperature within an integrated closed system while simultaneously purging the integrated closed system with a chlorine-containing gas. At the elevated temperatures the chlorine dissociates from the chlorine-containing gas and reacts with the contaminates on the substrate surface to form volatile chloride byproducts with such contaminants which are removed from the integrated closed system while the substrate is continuously heated and purged with the chlorine-containing gas. Subsequently, the substrate is moved to a cooling chamber within the integrated closed system and cooled to provide a semiconductor substrate having a clean surface.
摘要:
A process for the heat treatment of a silicon wafer, during which the silicon wafer is at least temporarily exposed to an oxygen-containing atmosphere, the heat treatment taking place at a temperature which is selected in such a way that the inequality 1 [ Oi ]