摘要:
A method of forming a polycrystalline silicon thin film improved in crystallinity and a channel of a transistor superior in electrical characteristics by the use of such a polycrystalline silicon thin film. An amorphous silicon layer of a thickness preferably of 30 nm to 50 nm is formed on a substrate. Next, substrate heating is performed to set the amorphous silicon layer to preferably 350.degree. C. to 500.degree. C., more preferably 350.degree. C. to 450.degree. C. Then, at least the amorphous silicon layer is irradiated with laser light of an excimer laser energy density of 100 mJ/cm.sup.2 to 500 mJ/cm.sup.2, preferably 280 mJ/cm.sup.2 to 330 mJ/cm.sup.2, and a pulse width of 80 ns to 200 ns, preferably 140 ns to 200 ns, so as to directly anneal the amorphous silicon layer and form a polycrystalline silicon thin film. The total energy of the laser used for the irradiation of excimer laser light is at least 5 J, preferably at least 10 J.
摘要翻译:通过使用这种多晶硅薄膜,形成提高结晶度的多晶硅薄膜的方法和电特性优异的晶体管的沟道。 在基板上形成厚度优选为30nm〜50nm的非晶硅层。 接下来,进行基板加热以将非晶硅层设定为350℃至500℃,更优选350℃至450℃。然后,至少对非晶硅层照射激光 准分子激光能量密度为100mJ / cm 2至500mJ / cm 2,优选为280mJ / cm 3至330mJ / cm 2,脉冲宽度为80ns至200ns,优选为140ns至200ns,以便直接退火 非晶硅层,形成多晶硅薄膜。 用于照射准分子激光的激光的总能量为至少5J,优选为至少10J。
摘要:
A method of forming a polycrystalline silicon thin film improved in crystallinity and a channel of a transistor superior in electrical characteristics by the use of such a polycrystalline silicon thin film. An amorphous silicon layer of a thickness preferably of 30 nm to 50 nm is formed on a substrate. Next, substrate heating is performed to set the amorphous silicon layer to preferably 350.degree. C. to 500.degree. C., more preferably 350.degree. C. to 450.degree. C. Then, at least the amorphous silicon layer is irradiated with laser light of an excimer laser energy density of 100 mJ/cm.sup.2 to 500 mJ/cm.sup.2, preferably 280 mJ/cm.sup.2 to 330 mJ/cm.sup.2, and a pulse width of 80 ns to 200 ns, preferably 140 ns to 200 ns, so as to directly anneal the amorphous silicon layer and form a polycrystalline silicon thin film. The total energy of the laser used for the irradiation of excimer laser light is at least 5 J, preferably at least 10 J.
摘要翻译:通过使用这种多晶硅薄膜,形成提高结晶度的多晶硅薄膜的方法和电特性优异的晶体管的沟道。 在基板上形成厚度优选为30nm〜50nm的非晶硅层。 接下来,进行基板加热以将非晶硅层设定为350℃至500℃,更优选350℃至450℃。然后,至少对非晶硅层照射激光 准分子激光能量密度为100mJ / cm 2至500mJ / cm 2,优选为280mJ / cm 3至330mJ / cm 2,脉冲宽度为80ns至200ns,优选为140ns至200ns,以便直接退火 非晶硅层,形成多晶硅薄膜。 用于照射准分子激光的激光的总能量为至少5J,优选为至少10J。
摘要:
A method of forming a polycrystalline silicon thin film includes irradiating an amorphous silicon layer with laser light of an excimer laser energy density of 100 mJ/cm.sup.2 to 500 mJ/cm.sup.2, preferably 280 mJ/cm.sup.2 to 330 mJ/cm.sup.2, and a pulse width of 80 ns to 200 ns, preferably 140 ns to 200 ns, so as to directly anneal the amorphous silicon layer and form a polycrystalline silicon thin film. The total energy of the laser used for the irradiation of excimer laser light is at least 5 J, preferably at least 10 J. The laser device includes an homogenizer movably mounted at the end of the optical path of the laser beam.
摘要翻译:形成多晶硅薄膜的方法包括用准分子激光能量密度为100mJ / cm 2至500mJ / cm 2,优选280mJ / cm 2至330mJ / cm 2的激光照射非晶硅层,脉冲宽度 80ns至200ns,优选140ns至200ns,以便直接退火非晶硅层并形成多晶硅薄膜。 用于照射准分子激光的激光的总能量为至少5J,优选为至少10J。激光装置包括可移动地安装在激光束的光路端部的均质器。
摘要:
A semiconductor material having more excellent electric characteristics than polycrystalline semiconductor materials and readily formed on various kinds of substrates is provided. The semiconductor material is made of substantially single crystalline semiconductor crystal grains 3a. These crystal grains 3a are preferentially oriented in a common surface orientation, such as {100}, {111} or {110}-orientation, and grain boundaries 3b of adjacent ones of the crystal grains 3a are in substantial lattice matching with each other at least in a part thereof. In case of {100} orientation, each crystal grain 3a has an approximately square shape, and they are regularly aligned in rows and columns. In case of {111} orientation, each crystal grain 3a has an approximately equilateral hexagonal shape, and they are aligned in an equilateral turtle shell pattern. In case of {110} orientation, each crystal grain 3a has an approximately hexagonal shape, and they are aligned in a turtle shell pattern. The semiconductor forming the crystal grains 3a is a group IV semiconductor having a diamond-type crystal structure, such as Si, Ge and C.
摘要:
A semiconductor device comprising a source/drain region and a channel region formed in a silicon thin film composed of a group of silicon single crystal grains which are each approximately rectangular-shaped and which are arranged in a grid pattern on the base body, where a selected orientation of the silicon single crystal grains to the surface of the base body is approximately the direction.
摘要:
A process of forming a silicon thin film includes the steps of: irradiating a pulsed rectangular ultraviolet beam on an amorphous or polycrystalline silicon layer formed on a base body, to thereby form a silicon thin film composed of a group of silicon single crystal grains which are each approximately rectangular-shaped and which are arranged in a grid pattern on the base body. In this process, the moved amount of a ultraviolet beam irradiating position in a period from completion of an irradiation of the rectangular ultraviolet beam to starting of the next irradiation of the rectangular ultraviolet beam is specified at 40 &mgr;m or less, and a ratio of the moved amount to a width of the rectangular ultraviolet beam measured in the movement direction thereof is in a range of 0.1 to 5%. Further, a selected orientation of the silicon single crystal grains to the surface of the base body is approximately the direction.
摘要:
A thickness detector includes a rotator having different shape marks, disposed at different positions in a rotation direction; an opposing member disposed opposite the rotator; a detector to detect and output a displacement amount of the rotator or the opposing member in a sheet thickness direction; and a controller. The controller is configured to acquire first output values for one rotation from the detector, in a state without sheet; determine, based on a value output from the detector, whether one of the plurality of marks is detected in a state with the sheet held; acquire a predetermined number of second output values after one of the marks is detected; extract, from the first output values, values corresponding to the second output values, based on the value corresponding to the detected mark; and calculate a sheet thickness based on the second output values and the extracted first output values.
摘要:
An observation plug 102 includes a spark plug body 50, an objective optical system 10, and a set of light conduction paths 16. The spark plug body 50 ignites gas in a combustion chamber by an electric discharge in a discharge gap 60, and has an observation hole 4 penetrating in an axial direction at a location dislocated from the discharge gap 60. The objective optical system 10, which is provided in the observation hole 4 to be exposed into the combustion chamber, bends a course of light received from an incident surface 10a facing toward the discharge gap included in an observation area, and forms an image of the observation area within the observation hole 4. The set of light conduction paths 16 is provided in the observation hole 4, and divides the image of the observation area into a plurality of portions to be transmitted therethrough.
摘要:
In a compression ignition internal combustion engine 20that generates electromagnetic wave plasma by emitting electromagnetic waves to a combustion chamber 21 during a period of a preceding injection, a control device 10 for internal combustion engine controls a fuel injection device 24 to perform, before a main injection, a preceding injection less in injection quantity than the main injection, while controlling a plasma generation device 30 to generate electromagnetic plasma by emitting electromagnetic waves to the combustion chamber 21 during the period of the preceding injection. The control device 10 controls a condition of heat production due to combustion of fuel from the main injection by controlling the amount of energy of the electromagnetic waves emitted to the combustion chamber 21 during the period of the preceding injection according to the operating condition of the internal combustion engine main body 22.
摘要:
A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.