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:
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.
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.
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:
In photo-irradiation heating with a total photo-irradiation time of one second or less, after initial photo-irradiation of a semiconductor wafer is performed while increasing an emission output to a target value, succeeding photo-irradiation of the semiconductor wafer is performed while maintaining the emission output within a range of plus or minus 20% from the target value. The photo-irradiation time for the initial photo-irradiation ranges from 0.1 to 10 milliseconds, and the photo-irradiation time for the succeeding photo-irradiation ranges from 5 milliseconds to less than one second. 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, thus achieving both the activation of implanted ions and the repair of introduced defects without any thermal damage to the semiconductor wafer.
摘要:
First flash irradiation from flash lamps is performed on an upper surface of a semiconductor wafer supported on a temperature equalizing ring of a holder to cause the semiconductor wafer to jump up from the temperature equalizing ring into midair. While the semiconductor wafer is in midair above the temperature equalizing ring, second flash irradiation from the flash lamps is performed on the upper surface of the semiconductor wafer to increase the temperature of the upper surface of the semiconductor wafer to a treatment temperature. Cracking in the semiconductor wafer is prevented because the second flash irradiation is performed while the semiconductor wafer is in midair and subject to no restraints.
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:
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:
In a heat treatment apparatus, a holding part moves upwardly to receive a semiconductor wafer transported into a chamber and placed on support pins. The semiconductor wafer held in close proximity to a light-transmittable plate by the holding part is preheated by a hot plate, and is then flash-heated by a flash of light emitted from flash lamps. Thereafter, the holding part moves downwardly to transfer the semiconductor wafer to the support pins, and the semiconductor wafer is transported out of the chamber. Then, a new semiconductor wafer is transported into the chamber. The holding part is adapted to perform such a series of operations of moving upwardly and downwardly also when in a standby condition pending the transport of the first semiconductor wafer in a lot into the chamber.
摘要:
A first flash heating is performed in which a flash lamp emits a first flashing light to a semiconductor wafer having been heated to a first preheating temperature equal to or lower than 650 degrees C. by a light emission from a halogen lamp so that the temperature of a surface of the semiconductor wafer reaches 1000 degrees C. or higher. Then, a second flash heating is performed in which a second flashing light is emitted to the semiconductor wafer having been further heated by a light emission of the halogen lamp. Performing the first flash heating can suppress diffusion of impurity in the subsequent second flash heating. In the second flash heating, the impurity is activated and introduced crystal defects are recovered.