摘要:
Exact alignment of a recrystallized region, which is to be formed in an amorphous or polycrystalline film, is facilitated. An alignment mark is formed, which is usable in a step of forming an electronic device, such as a thin-film transistor, in the recrystallized region. In addition, in a step of obtaining a large-grain-sized crystal-phase semiconductor from a semiconductor film, a mark structure that is usable as an alignment mark in a subsequent step is formed on the semiconductor film in the same exposure step. Thus, the invention includes a light intensity modulation structure that modulates light and forms a light intensity distribution for crystallization, and a mark forming structure that modulates light and forms a light intensity distribution including a pattern with a predetermined shape, and also forms a mark indicative of a predetermined position on a crystallized region.
摘要:
Exact alignment of a recrystallized region, which is to be formed in an amorphous or polycrystalline film, is facilitated. An alignment mark is formed, which is usable in a step of forming an electronic device, such as a thin-film transistor, in the recrystallized region. In addition, in a step of obtaining a large-grain-sized crystal-phase semiconductor from a semiconductor film, a mark structure that is usable as an alignment mark in a subsequent step is formed on the semiconductor film in the same exposure step. Thus, the invention includes a light intensity modulation structure that modulates light and forms a light intensity distribution for crystallization, and a mark forming structure that modulates light and forms a light intensity distribution including a pattern with a predetermined shape, and also forms a mark indicative of a predetermined position on a crystallized region.
摘要:
An object of the present invention is to provide a phase shifter for laser annealing which is capable of effectively preventing the sticking of particles. A first layer and a third layer are made of quartz glass, and a two-dimensional pattern of fine grooves is formed in the surfaces of the layers. The first layer and the third layer are arranged so that a second layer is sandwiched between the layers in a state in which the surfaces provided with the grooves face each other. A peripheral edge portion of the first layer is laminated on that of the third layer by a spacer. The second layer is made of an inactive gas introduced between the first layer and the third layer.
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:
An object of the present invention is to provide a phase shifter for laser annealing which is capable of effectively preventing the sticking of particles. A first layer and a third layer are made of quartz glass, and a two-dimensional pattern of fine grooves is formed in the surfaces of the layers. The first layer and the third layer are arranged so that a second layer is sandwiched between the layers in a state in which the surfaces provided with the grooves face each other. A peripheral edge portion of the first layer is laminated on that of the third layer by a spacer. The second layer is made of an inactive gas introduced between the first layer and the third layer.
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:
There are provided a crystallization method which can design laser beam having a light intensity and a distribution optimized on an incident surface of a substrate, form a desired crystallized structure while suppressing generation of any other undesirable structure area and satisfy a demand for low-temperature processing, a crystallization apparatus, a thin film transistor and a display apparatus. When crystallizing a non-single-crystal semiconductor thin film by irradiating laser beam thereto, irradiation light beam to the non-single-crystal semiconductor thin film have a light intensity with a light intensity distribution which cyclically repeats a monotonous increase and a monotonous decrease and a light intensity which melts the non-single-crystal semiconductor. Further, at least a silicon oxide film is provided on a laser beam incident surface of the non-single-crystal semiconductor film.
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 treatment method of annealing and doping a semiconductor including irradiating a semiconductor layer (13) formed on a substrate (11) with a laser beam (a), thereby melting at least a part of the semiconductor layer; irradiating a target material (2) including atoms with which the semiconductor layer is to be doped with the laser beam (a′), thereby ablating the atoms of the target material; and doping the melted semiconductor layer with the ablated atoms.
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.