Abstract: A method for manufacturing a semiconductor device of the present disclosure includes: ion-implanting impurities into a source-drain electrodes forming region where a source electrode and a drain electrode are to be formed on a nitride semiconductor layer formed on a substrate; forming a silicon nitride film on the surface of the nitride semiconductor layer by a plasma-enhanced chemical vapor deposition method, the silicon nitride film constituting a surface protecting sacrifice film and having a refractive index of 1.80 or more and less than 1.88 and a thickness of 100 nm or more and 500 nm or less; and heat-treating the nitride semiconductor layer on which the surface protecting sacrifice film is formed.

Abstract: A shovel is provided with a traveling body, a turning body, and a reception unit. The turning body is disposed on top of the traveling body, and turns about a turning axis with respect to the traveling body. The reception unit receives, from a reference station, specification information for specifying the position of the turning body. The reception unit is disposed between the turning axis and the rear end of the turning body. The turning body preferably includes a cabin. The reception unit is preferably disposed in a rear portion of the cabin.

Abstract: On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The control valve is supported by a support member, and a controller that outputs a signal for driving the control valve is mounted to a side plate part of the support member, thereby to be placed in a position in front of the control valve and above the battery.

Abstract: On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The controller, which outputs a signal to drive the control valve, is placed opposite the hydraulic oil tank.

Abstract: This construction machine includes a lower traveling body; an upper swiveling body; and a rotary coupling member that swivels, together with the upper swiveling body, with respect to the lower traveling body. The rotary coupling member has a swivel joint; a rotary joint that includes a slip ring; a cable; a coupling part; and a detent part that is fixed to the body of the swivel joint and that restricts the rotation of a terminal part of the slip ring.

Abstract: The present invention includes: a base carrier; a revolving superstructure provided above the base carrier in a manner capable of revolving; a boom bracket supported by the revolving superstructure in a horizontally rotatable manner about a center axis of the revolving superstructure and about an axis parallel to the center axis; a work machine supported by the boom bracket in a horizontally rotatable manner about the axis parallel to the center axis and in a vertically rotatable manner; a first position detecting sensor that is installed on the swing body and that detects a horizontal movement of the swing body about the axis; a second position detecting sensor that is installed on the work machine and that detects a vertical movement of the work machine; and a position detecting apparatus detecting a horizontal movement of the revolving superstructure about the center axis of the revolving superstructure.

Abstract: The present invention includes: a base carrier; a revolving superstructure provided above the base carrier in a manner capable of revolving; a boom bracket supported by the revolving superstructure in a horizontally rotatable manner; a work machine supported by the boom bracket in a vertically rotatable manner; a first position detecting device that detects a horizontal position of the boom bracket with respect to the revolving superstructure; a second position detecting device that detects a vertical position of the work machine with respect to the revolving superstructure; and an arithmetic unit that calculates a position of a working end of the work machine based on the results of detection by those position detecting devices.

Abstract: This construction machine comprises: includes a work machine; an automatic controller for automatically controlling the work machine according to design information; an operation lever for manually controlling the work machine; and an automatic switch mounted on the operation lever and alternatively switching between activation and deactivation of the automatic control. The manual control of the work machine has higher priority than the automatic control.

Abstract: A revolving work vehicle includes a lower traveling body and an upper revolving body. The upper revolving body is revolvably supported by the lower traveling body. The upper revolving body comprises: a roof; rear-side support columns; a base body; antenna support columns; and GNSS antennas. The roof is disposed above an operator's seat. The rear-side support columns are disposed as a pair and extend upwards from the rear section of the upper revolving body so as to support the roof. The base body is attached to both of the pair of rear-side support columns so as to connect the pair of rear-side support columns to each other. The antenna columns are disposed as a pair and extend upwards from the base body at positions which do not overlap with the roof in a plan view. The GNSS antennas are disposed as a pair.

Abstract: A turning work vehicle comprises a lower travel body, an upper turning body, a work device, a rotation body, and a support column. The lower travel body is provided with a blade. The upper turning body is supported by the lower travel body so as to be able to turn. The work device is supported by the upper turning body so as to be able to rotate. The rotation body is provided to the blade. The support column is provided so as to project from the rotation body. A target prism, which is the measurement object of a total station, can be secured to the support column. The rotation body rotates in relation to the blade, whereby the posture of the support column is configured so as to be able to switch between an upright posture and a fallen posture.

Abstract: A construction machine in which an electrical unit can be reliably cooled at low cost by effectively utilizing an intake pipe connected to an intake port of an engine. This construction machine includes: an engine; and a hood covering the engine, wherein a space inside the hood has a placement space in which an electrical unit is placed and which communicates with outside air, and a distal-end opening of an intake pipe connected to an inlet port of the engine is disposed in the placement space to cause outside air sucked into the intake pipe due to a suction pressure occurred in the intake pipe to pass through the placement space to form a cooling air path in the placement space.

Abstract: The present invention includes: a base carrier; a revolving superstructure provided above the base carrier in a manner capable of revolving; a boom bracket supported by the revolving superstructure in a horizontally rotatable manner; a work machine supported by the boom bracket in a vertically rotatable manner; a first position detecting device that detects a horizontal position of the boom bracket with respect to the revolving superstructure; a second position detecting device that detects a vertical position of the work machine with respect to the revolving superstructure; and an arithmetic unit that calculates a position of a working end of the work machine based on the results of detection by those position detecting devices.

Abstract: According to the present invention, a display system of a turning work vehicle is used for the turning work vehicle in which a work machine having a bucket 8 can be offset relative to a revolving superstructure in the horizontal direction. The display system includes: an arithmetic unit that calculates the position of the bucket on the basis of a detection result obtained by a position detecting device provided on the turning work vehicle, and calculates a necessary revolving amount of the revolving superstructure and a necessary offset amount of the work machine that are needed to align a side section of the bucket with a side edge of a predetermined excavation area; and a display device that displays the positional relationship between the bucket and the predetermined excavation area.

Abstract: A construction machine in which an electrical unit can be reliably cooled at low cost by effectively utilizing an intake pipe connected to an intake port of an engine. This construction machine includes: an engine; and a hood covering the engine, wherein a space inside the hood has a placement space in which an electrical unit is placed and which communicates with outside air, and a distal-end opening of an intake pipe connected to an inlet port of the engine is disposed in the placement space to cause outside air sucked into the intake pipe due to a suction pressure occurred in the intake pipe to pass through the placement space to form a cooling air path in the placement space.

Abstract: A construction machine in which an electrical unit can be reliably cooled at low cost by effectively utilizing an intake pipe connected to an intake port of an engine. This construction machine includes: an engine; and a hood covering the engine, wherein a space inside the hood has a placement space in which an electrical unit is placed and which communicates with outside air, and a distal-end opening of an intake pipe connected to an inlet port of the engine is disposed in the placement space to cause outside air sucked into the intake pipe due to a suction pressure occurred in the intake pipe to pass through the placement space to form a cooling air path in the placement space.

Abstract: A construction machine in which an electrical unit can be reliably cooled at low cost by effectively utilizing an intake pipe connected to an intake port of an engine. This construction machine includes: an engine; and a hood covering the engine, wherein a space inside the hood has a placement space in which an electrical unit is placed and which communicates with outside air, and a distal-end opening of an intake pipe connected to an inlet port of the engine is disposed in the placement space to cause outside air sucked into the intake pipe due to a suction pressure occurred in the intake pipe to pass through the placement space to form a cooling air path in the placement space.