摘要:
A light source comprising a plurality of flash lamps emits flashes thereby flash-heating a semiconductor wafer held by a thermal diffuser and a hot plate. The current distance of irradiation between the thermal diffuser and the hot plate holding the semiconductor wafer and the light source is so adjusted as to attain predetermined intensity of irradiation. The distance of irradiation between the thermal diffuser and the hot plate and the light source can be changed or corrected by vertically moving the thermal diffuser and the hot plate. Thus provided is a thermal processing apparatus using the flash lamps, capable of readily controlling the intensity of irradiation.
摘要:
A light source including a plurality of flash lamps emits flashes thereby flash-heating a semiconductor wafer held by a thermal diffuser and a hot plate. The current distance of irradiation between the thermal diffuser and the hot plate holding the semiconductor wafer and the light source is so adjusted as to attain predetermined intensity of irradiation. The distance of irradiation between the thermal diffuser and the hot plate and the light source can be changed or corrected by vertically moving the thermal diffuser and the hot plate. The thermal processing apparatus which uses the flash lamps, is thus capable of readily controlling the intensity of irradiation.
摘要:
A light source including a plurality of flash lamps emits flashes thereby flash-heating a semiconductor wafer held by a thermal diffuser and a hot plate. The current distance of irradiation between the thermal diffuser and the hot plate holding the semiconductor wafer and the light source is so adjusted as to attain predetermined intensity of irradiation. The distance of irradiation between the thermal diffuser and the hot plate and the light source can be changed or corrected by vertically moving the thermal diffuser and the hot plate. The thermal processing apparatus which uses the flash lamps, is thus capable of readily controlling the intensity of irradiation.
摘要:
A light source comprising a plurality of flash lamps emits flashes thereby flash-heating a semiconductor wafer held by a thermal diffuser and a hot plate. The current distance of irradiation between the thermal diffuser and the hot plate holding the semiconductor wafer and the light source is so adjusted as to attain predetermined intensity of irradiation. The distance of irradiation between the thermal diffuser and the hot plate and the light source can be changed or corrected by vertically moving the thermal diffuser and the hot plate. Thus provided is a thermal processing apparatus using the flash lamps, capable of readily controlling the intensity of irradiation.
摘要:
In a light diffuser, a strong light diffusion processing is performed to a lamp corresponding part located in a vertical immediate downward direction of each of a plurality of flash lamps, and a weak light diffusion processing is performed to an inter-lamp corresponding part located between lamp corresponding parts adjacent to each other. Thereby, the light transmittance of the lamp corresponding part is lower than that of the inter-lamp corresponding part. Light that is emitted from each of the flash lamps and directed to a vertical immediate downward direction is diffused intensely, while reducing the degree of light diffusion at a location immediately below space between the adjacent flash lamps, thereby improving in-plane uniformity of illumination distribution on a semiconductor wafer. This enables to provide a thermal processing apparatus capable of improving in-plane uniformity of illumination distribution on a substrate.
摘要:
A susceptor is formed with a cavity having a tapered surface and a receiving surface. The gradient α of the tapered surface with respect to the receiving surface is set to at least 5° and less than 30°, so that a semiconductor wafer received by the susceptor can be located on the receiving surface through the tapered surface while the semiconductor wafer can be protected against excess stress also when the surface of the wafer abruptly thermally expands due to flashlight irradiation and can be prevented from cracking in thermal processing. Thus provided are a thermal processing susceptor and a thermal processing apparatus capable of preventing a substrate from cracking in thermal processing.
摘要:
A chamber has a wall surface fitted with a liner. The liner is removably provided to the chamber with no fixed relation therebetween. By simply opening a light source to remove a heat diffusion plate, a hot plate and a tubular member from the chamber, the liner can be easily detached accordingly from the chamber. When a semiconductor wafer cracks to litter the chamber with its fragments, the chamber can be easily cleaned by simply detaching the liner. The liner has an outer surface subjected to surface roughening by honing. When a flash lamp emits flashlight of considerably high intensity, the roughened outer surface of the liner serves to block this flashlight. As a result, the metal surface inside the chamber is prevented from being exposed to the flashlight emitted from the flash lamp.
摘要:
A heat treating apparatus for heat treating a substrate by irradiating the substrate with light includes a heat treating chamber for receiving the substrate, a heating plate for preheating the substrate through a thermal diffuser plate, xenon flashlamps for heating the substrate preheated by the heating plate, to a treating temperature by irradiating the substrate with flashes of light, and a decompression mechanism for decompressing the heat treating chamber when the xenon flashlamps heat the substrate.
摘要:
A plurality of flash lamps are covered with a reflector. Optical fiber members are attached to the reflector on portions located immediately above the flash lamps. When the flash lamps emit flash light toward a semiconductor wafer, the optical fiber members partially guide the emitted light so that a CCD measures the intensity of light emitted from each of the plurality of flash lamps. A computer detects the emission state of each of the plurality of flash lamps on the basis of a result of measurement. At this time, the computer compares standard luminous intensity obtained when the irradiation state on the semiconductor wafer satisfies a prescribed criterion with the luminous intensity in actual processing for detecting the emission states of the plurality of flash lamps. Thus provided is a thermal processing apparatus capable of reliably and simply detecting deterioration of lamps.
摘要:
Reflectance measurement with two monochromatic light beams having different wavelengths is used to obtain curves respective representing the relationship between an insulation film thickness of a semiconductor wafer and the gap between a test electrode and a semiconductor wafer surface. The C-V curve measurement at a fixed gap determines a total capacity of the gap and the insulation film, and a straight line representing the relationship between the gap and the insulation film thickness is obtained from the total capacity. An intersection where the two curves and the straight line cross gives the true values of the gap and the insulation film thickness. Other possible methods include: one for executing the C-V curve measurement and the reflectance measurement with two linear polarized light beams having identical wavelengths but different polarization directions; one for executing the reflectance measurement with three monochromatic light beams that differ in at least wavelength and/or polarization direction; and one for executing the reflectance measurement and the C-V curve measurement for two different gaps.