摘要:
In light-irradiation heating with a total irradiation time of one second or less, two-stage irradiation is performed, including a first stage of light irradiation of a semiconductor wafer, which irradiation produces an output waveform that reaches a peak at a given emission output; and a second stage of supplemental light irradiation of the semiconductor wafer, which irradiation is started after the peak, producing an emission output smaller than the above given emission output. The emission output in the second stage is two thirds or less than the above given emission output at the peak. The first-stage light-irradiation time is between 0.1 and 10 milliseconds, and the second-stage light-irradiation time is 5 milliseconds or more. This allows the temperature of the semiconductor wafer even at a somewhat greater depth below the surface to be raised to some extent while allowing the surface temperature to be maintained at a generally constant processing temperature.
摘要:
A substrate processing apparatus includes a substrate holding unit for holding a substrate to be processed substantially horizontally, a process liquid nozzle for supplying a process liquid to a main surface of the substrate held by the substrate holding unit, a gas nozzle for supplying an inert gas to the main surface of the substrate held by the substrate holding unit, a gas nozzle moving unit for moving the gas nozzle along the main surface, and a control unit for carrying out a liquid film forming process for forming a liquid film of the process liquid on a whole area of the main surface of the substrate held by the substrate holding unit by supplying the process liquid from the process liquid nozzle to the main surface of the substrate, and a liquid film free region forming process for forming a liquid film free region from which the liquid film is removed away in a region of the main surface not including a center of the main surface by supplying an inert gas to the main surface on which the liquid film is formed, a liquid film free region moving process for moving the liquid film free region to locate the center of the main surface in the liquid film free region by moving the gas nozzle by means of the gas nozzle moving unit with supplying the inert gas from the gas nozzle to the main surface after the liquid film free region forming process, and a substrate drying process for removing the process liquid from the main surface by spreading the liquid film free region after the liquid film free region moving process to dry the substrate.
摘要:
The first flash irradiation is performed on a semiconductor wafer preheated to 500° C. to heat a front surface of the semiconductor wafer. Thereafter, the second flash irradiation is performed to reheat the front surface of the semiconductor wafer before the temperature of the front surface of the semiconductor wafer becomes equal to the temperature of a back surface of the semiconductor wafer. Thus, the second flash irradiation is performed before the temperature of the front surface of the semiconductor wafer falls. Even if less energy is consumable by the second flash irradiation, the efficiency of heating of the front surface of the semiconductor wafer resulting from each iteration of the flash irradiation is improved.
摘要:
Flash lamps connected to short-pulse circuits and flash lamps connected to long-pulse circuits are alternately arranged in a line. The duration of light emission from the flash lamps connected to the long-pulse circuits is longer than the duration of light emission from the flash lamps connected to the short-pulse circuits. A superimposing of a flash of light with a high peak intensity from the flash lamps that emit light for a short time and a flash of light with a gentle peak from the flash lamps that emit light for a long time can increase the temperature of even a deep portion of a substrate to an activation temperature or more without heating a shallow portion near the substrate surface more than necessary. This achieves the activation of deep junctions without causing substrate warpage or cracking.
摘要:
Flash lamps connected to short-pulse circuits and flash lamps connected to long-pulse circuits are alternately arranged in a line. The duration of light emission from the flash lamps connected to the long-pulse circuits is longer than the duration of light emission from the flash lamps connected to the short-pulse circuits. A superimposing of a flash of light with a high peak intensity from the flash lamps that emit light for a short time and a flash of light with a gentle peak from the flash lamps that emit light for a long time can increase the temperature of even a deep portion of a substrate to an activation temperature or more without heating a shallow portion near the substrate surface more than necessary. This achieves the activation of deep junctions without causing substrate warpage or cracking.
摘要:
A susceptor for holding a semiconductor wafer to be flash-heated by a flash of light emitted from flash lamps is formed of transparent quartz. The susceptor has a backside surface only which is roughened by shot blasting to provide a ground-glass-like surface. When a flash of light is emitted, part of the flash of light emitted from the flash lamps and passing by a peripheral portion of the semiconductor wafer held by the susceptor into the susceptor reaches the ground-glass-like backside surface and is diffusely reflected therefrom. Part of the diffusely reflected light impinges on the peripheral portion of the semiconductor wafer held by the susceptor to thereby heat the low temperature regions which have appeared in the peripheral portion of the semiconductor wafer.
摘要:
In light-irradiation heating with a total irradiation time of one second or less, two-stage irradiation is performed, including a first stage of light irradiation of a semiconductor wafer, which irradiation produces an output waveform that reaches a peak at a given emission output; and a second stage of supplemental light irradiation of the semiconductor wafer, which irradiation is started after the peak, producing an emission output smaller than the above given emission output. The emission output in the second stage is two thirds or less than the above given emission output at the peak. The first-stage light-irradiation time is between 0.1 and 10 milliseconds, and the second-stage light-irradiation time is 5 milliseconds or more. This allows the temperature of the semiconductor wafer even at a somewhat greater depth below the surface to be raised to some extent while allowing the surface temperature to be maintained at a generally constant processing temperature.
摘要:
Flash lamps connected to short-pulse circuits and flash lamps connected to long-pulse circuits are alternately arranged in a line. The duration of light emission from the flash lamps connected to the long-pulse circuits is longer than the duration of light emission from the flash lamps connected to the short-pulse circuits. A superimposing of a flash of light with a high peak intensity from the flash lamps that emit light for a short time and a flash of light with a gentle peak from the flash lamps that emit light for a long time can increase the temperature of even a deep portion of a substrate to an activation temperature or more without heating a shallow portion near the substrate surface more than necessary. This achieves the activation of deep junctions without causing substrate warpage or cracking.
摘要:
Flash lamps connected to short-pulse circuits and flash lamps connected to long-pulse circuits are alternately arranged in a line. The duration of light emission from the flash lamps connected to the long-pulse circuits is longer than the duration of light emission from the flash lamps connected to the short-pulse circuits. A superimposing of a flash of light with a high peak intensity from the flash lamps that emit light for a short time and a flash of light with a gentle peak from the flash lamps that emit light for a long time can increase the temperature of even a deep portion of a substrate to an activation temperature or more without heating a shallow portion near the substrate surface more than necessary. This achieves the activation of deep junctions without causing substrate warpage or cracking.
摘要:
Flash lamps connected to short-pulse circuits and flash lamps connected to long-pulse circuits are alternately arranged in a line. The duration of light emission from the flash lamps connected to the long-pulse circuits is longer than the duration of light emission from the flash lamps connected to the short-pulse circuits. A superimposing of a flash of light with a high peak intensity from the flash lamps that emit light for a short time and a flash of light with a gentle peak from the flash lamps that emit light for a long time can increase the temperature of even a deep portion of a substrate to an activation temperature or more without heating a shallow portion near the substrate surface more than necessary. This achieves the activation of deep junctions without causing substrate warpage or cracking.