摘要:
A crystallization apparatus includes an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film, and a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from the illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of the non-single-crystal semiconductor film containing an axis corresponding to the boundary. The phase shifter further includes a small region which extends into at least one of the first and second regions from the boundary and transmits the illumination light by a second phase retardation with respect to the at least one of the first and second regions.
摘要:
A method of manufacturing a thin-film semiconductor device substrate includes a step of forming a non-single crystalline semiconductor thin film on a base layer, and an annealing step of irradiating the non-single crystalline semiconductor thin film with an energy beam to enhance crystallinity of a non-single crystalline semiconductor constituting the non-single crystalline semiconductor thin film. The annealing step includes simultaneously irradiating the non-single crystalline semiconductor thin film with a plurality of energy beams to form a plurality of unit regions each including at least one irradiated region irradiated with the energy beam and at least one non-irradiated region that is not irradiated with the energy beam.
摘要:
A method for producing a thin film semiconductor device is described. In the method, a thin film layer of non-single-crystalline semiconductor, which is deposited on a base layer of glass, is processed to an island-shaped thin film layer at the time prior to the layer irradiation step. The laser irradiation to the thin film layer of non-single-crystalline semiconductor is carried out after forming an insulation film layer and a gate electrode over the island-shaped thin film layer, by using the gate electrode as the irradiation mask, whereby the center area of the island-shaped thin film layer masked by the gate electrode is crystallized, and simultaneously, the both side areas thereof which is not masked by the gate electrode are annealed. Next, a source electrode and a drain electrode is formed in the annealed areas. The implantation of impurity ion may be carried out either before or after the laser irradiation. By the above order of steps, it becomes possible to obtain a thin film semiconductor device which has small numbers of crystals and less variance of grain size of crystals for each unit of electric circuit, compared with a device produced by the conventional process. Further, the process makes it possible to be even the boundary surface between the crystallized layer and the insulation layer in a device.
摘要:
A method of manufacturing a thin-film semiconductor device substrate includes a step of forming a non-single crystalline semiconductor thin film on a base layer, and an annealing step of irradiating the non-single crystalline semiconductor thin film with an energy beam to enhance crystallinity of a non-single crystalline semiconductor constituting the non-single crystalline semiconductor thin film. The annealing step includes simultaneously irradiating the non-single crystalline semiconductor thin film with a plurality of energy beams to form a plurality of unit regions each including at least one irradiated region irradiated with the energy beam and at least one non-irradiated region that is not irradiated with the energy beam.
摘要:
A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
摘要:
A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
摘要:
A crystallization apparatus includes an illumination system which illuminates a phase-shift mask and an image-forming optical system arranged in an optical path between the phase-shift mask and a semiconductor film. The semiconductor film is irradiated with a light beam having a light intensity distribution of inverted peak patterns whose light intensity is the lowest in portions corresponding to phase shift sections to form a crystallized semiconductor film. The image-forming optical system is located to optically conjugate the phase-shift mask and the semiconductor film and has an aberration corresponding to the given wavelength range to form a light intensity distribution of inverted peak patterns with no swell of intensity in the middle portion.
摘要:
A crystallization apparatus includes an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film, and a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from the illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of the non-single-crystal semiconductor film containing an axis corresponding to the boundary. The phase shifter further includes a small region which extends into at least one of the first and second regions from the boundary and transmits the illumination light by a second phase retardation with respect to the at least one of the first and second regions.
摘要:
A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
摘要:
The present invention is directed to a crystallization apparatus including an illumination system to illuminate a phase shift mask, which converts a light beam from the illumination system into a light beam that has a light intensity distribution of an inverse peak pattern having a minimum intensity in an area corresponding to a phase shift portion of the phase shift mask. The crystallization apparatus further includes an optical member to form on a predetermined plane a light intensity distribution of a concave pattern, which has a light intensity that is minimum in an area corresponding to the phase shift portion and increases toward the circumference of that area based on the light from the illumination system, and an image-forming optical system to set a surface of the polycrystalline semiconductor film or the amorphous semiconductor film or its conjugate plane and the predetermined plane to an optical conjugate relationship.