Abstract: An object of the present invention is to provide with a method for manufacturing a semiconductor circuit by which a TFT including particles having a different threshold value is prevented from being operated even if such a TFT is locally formed.

Abstract: An object of the present invention is to provide a method for manufacturing a semiconductor circuit by which a TFT including particles having a different threshold value is prevented from being operated even if such a TFT is locally formed. According to the present invention, after forming an amorphous silicon layer on a glass substrate, heat treatment and the like is performed to convert the amorphous silicon layer into a polycrystalline silicon layer. At this time, a particle having an abnormal grain diameter is generated in a polycrystalline silicon layer under the influence of foreign particles in a glass substrate, and a TFT having a different threshold value may be formed.

Abstract: An X-Y direction input device includes a ball, a switchboard carrying push switches, first and second follower rollers rotated by the ball having axes perpendicular to each other, and rotation detecting means which all are enveloped by an outer shell. The push switches are activated by switch activating members exposed on the outer surface of the outer shell. The axes of the first and second follower rollers may be rotated by a desired angle with respect to an orientation of the outer shell.

Abstract: An exhaust gas purification control apparatus for an internal combustion engine wherein vacuum signals applied to air fuel mixture control, exhaust gas recirculation control, and ignition timing control are modified by a vacuum signal modifier. The vacuum signal modifier is operative in response to a pressure signal applied thereto. This pressure signal is produced by a pressure signal control device by diluting a venturi vacuum with air.

Abstract: A vacuum actuated system comprises a carburetor induction passage having a plurality of vacuum ports, vacuum servo means, fluid network means connecting the plurality of vacuum ports to the vacuum servo means and control means for selectively opening and closing communication between at least one of the plurality of vacuum ports and the vacuum servo means.

Abstract: A part of the exhaust gases from an engine proper is fed into an intake manifold via an insulated space which is formed between an inner shell defining therein an exhaust gas passage through which the exhaust gases from the engine proper pass before discharging into the open air, and an outer shell spacedly but substantially covering the inner shell.

Abstract: The vacuum advance control system to control the spark timing is disclosed. It comprises the application of a vacuum from the intake manifold of an engine to an advance control in the engine distributor through a vacuum line wherein the intake manifold vacuum controls the spark timing, an air bleed orifice opening to the vacuum line at an opening formed therein; an orifice provided in the vacuum line between the opening and the source of application of the vacuum from the intake manifold so as to prevent excessive flow of air into the engine carburetor and the intake manifold; and means for bleeding an ambient air into the vacuum line through the air bleed orifice. A second air bleed orifice is provided in the system and is at all times open to the ambient air.

Abstract: Exhaust gases from an internal combustion are chemically decomposed in a catalytic converter and then oxidized in a thermal reactor.