Abstract: An object of the present invention is to provide a quantum dot and a method for manufacturing a quantum dot capable of enhancing the EQE. A method for manufacturing the quantum dot of the present invention includes steps of: generating a core and coating a shell on a surface of the core, wherein in the step of coating the shell, an acidic compound and a zinc halide compound are blended in a shell raw material. In the present invention, the step of coating the shell is divided into at least a first half and a second half. In the first half, a shell raw material in which the acidic compound is blended and the zinc halide compound is not blended is used, while in the second half, it is preferable that the shell is coated a plurality of times using the shell raw material in which both the acidic compound and the zinc halide compound are blended.

Abstract: A diaphragm member includes a film-shaped diaphragm made of PFA and a valve body which is laser welded to a central hole portion of the diaphragm.

Abstract: A diaphragm member includes a film-shaped diaphragm made of PFA and a valve body which is laser welded to a central hole portion of the diaphragm.

Abstract: An air-operated valve which can keep the impact at the time a valve part sits on a seat from causing material from shedding and thereby generating particles which contaminate a controlled fluid and thereby can maintain a high cleanliness of the controlled fluid, that is, an air-operated valve which is provided with a valve chamber body which has a valve chamber which forms a seat, a valve mechanism which is provided with a valve part which seals the seat and with a diaphragm in the valve chamber, and a housing body which houses a drive mechanism which uses working air to make the valve mechanism advance and retract to drive and control it to open and close the seat, the drive mechanism provided with a first piston, a first spring which biases the first piston, a second piston which is slidably housed in the housing body and slidably houses the first piston inside it and which pushes the first piston, and a second spring which biases the second piston, the spring force of the second spring being made larger th

Abstract: An air-operated valve which can keep the impact at the time a valve part sits on a seat from causing material from shedding and thereby generating particles which contaminate a controlled fluid and thereby can maintain a high cleanliness of the controlled fluid, that is, an air-operated valve which is provided with a valve chamber body which has a valve chamber which forms a seat, a valve mechanism which is provided with a valve part which seals the seat and with a diaphragm in the valve chamber, and a housing body which houses a drive mechanism which uses working air to make the valve mechanism advance and retract to drive and control it to open and close the seat, the drive mechanism provided with a first piston, a first spring which biases the first piston, a second piston which is slidably housed in the housing body and slidably houses the first piston inside it and which pushes the first piston, and a second spring which biases the second piston, the spring force of the second spring being made larger th

Abstract: The object is to provide a mixing valve and a mixing device which can more easily control the flow rates of one fluid and another fluid or fluids in comparison with a conventional mixing valve. In a mixing valve 10A in which a main passage 13 through which one fluid f1 passes and at least one subsidiary passage 14 (14A, 14B) through which the other fluids f2, f3 pass are connected via opening/closing valve portions 20A, 20B to open/close communicating openings 18A, 18B, pressure sensors 31, 32, 33 (34) are disposed in the main passage and the subsidiary passages, respectively, to detect the pressures of the fluids passing through the main passage and the subsidiary passages.

Abstract: The object is to provide a mixing valve and a mixing device which can more easily control the flow rates of one fluid and another fluid or fluids in comparison with a conventional mixing valve. In a mixing valve 10A in which a main passage 13 through which one fluid f1 passes and at least one subsidiary passage 14 (14A, 14B) through which the other fluids f2, f3 pass are connected via opening/closing valve portions 20A, 20B to open/close communicating openings 18A, 18B, pressure sensors 31, 32, 33(34) are disposed in the main passage and the subsidiary passages, respectively, to detect the pressures of the fluids passing through the main passage and the subsidiary passages.

Abstract: A flow control system able to realize stabilization of a flow rate of fluid at a high precision even in cases where pressure fluctuation of an outlet fluid of the flow control system occurs, that is, a flow control system arranged in a supply line of fluid running from a fluid supply part to a predetermined fluid usage part, provided with a first pressure control valve part arranged on the fluid supply part side and a second pressure control valve part arranged on the fluid usage part side through the first pressure control valve part and a pressure loss part, the first pressure control valve part provided with a first pressure control mechanism maintaining the outlet fluid at a predetermined pressure by a first valve part arranged within a first valve chamber moving back and forth with respect to a first valve seat in accordance with pressure fluctuation of the inlet fluid, the second pressure control valve part provided with a second pressure control mechanism maintaining the inlet fluid at a predetermined

Abstract: A flow rate sensor high in pressure resistance has a structure to facilitate the measurement of a minuscule differential pressure for measurement of a very small flow rate. A chamber (20) is defined into a primary chamber (21) and a secondary chamber (25) by two diaphragms (31, 32) arranged in an opposed relation to each other. A fluid is passed from the primary chamber to the secondary chamber through a bypass (35) having an orifice portion (40) thereby to generate a differential pressure. The load generated by the fluid pressure fluctuations received by the first and second diaphragms is detected as a difference of displacement by a load difference sensor (50) arranged between the first and second diaphragms thereby to detect the flow rate of the fluid. Displacement limiting members (61, 62) are provided for the diaphragms or the load difference sensor so that the displacement due to the fluid pressure fluctuations received by the first and second diaphragms may not exceed a predetermined amount.

Abstract: A novel flow rate sensor high in pressure resistance, which has such a structure as to facilitate the measurement of a minuscule differential pressure for measurement of a very small flow rate, is disclosed. A chamber (20) is defined into a primary chamber (21) and a secondary chamber (25) by two diaphragms (31, 32) arranged in an opposed relation to each other. A fluid is passed from the primary chamber to the secondary chamber through a bypass (35) having an orifice portion (40) thereby to generate a differential pressure. The load generated by the fluid pressure fluctuations received by the first and second diaphragms is detected as a difference of displacement by a load difference sensor (50) arranged between the first and second diaphragms thereby to detect the flow rate of the fluid.

Abstract: An injector is disclosed, in which the change in the internal pressure of each chamber is relaxed when a pressure application mechanism is reciprocating thereby to lengthen the service life of the component parts including a diaphragm portion.

Abstract: An injector is disclosed, in which the change in the internal pressure of each chamber is relaxed when a pressure application mechanism is reciprocating thereby to lengthen the service life of the component parts including a diaphragm portion.

Abstract: A tube connecting structure C1 including a gasket member 10 having annular, tub recesses 12, 13 tube members 20, 30 having folded edge portions 22, 32 formed by folding ends thereof over the outer circumference so that convex ends 23, 33 are brought into tight contact with the annular recesses of the gasket member, outer rings 40, 50 mounted onto the outer circumference of body portions 21, 31 of the respective tube members 20, 30 so that front ends 41, 51 are located behind the convex ends of the folded edge portions and rear ends 42, 52 are out of the folded edge portions, presser members 60, 70 having contact sections 61, 71 with the gasket member and outer ring pressing sections 62, 72 for pushing the rear ends of the outer rings toward the mating outer ring, and a clamp member 80 for compressing the respective presser members together with the gasket member.

Abstract: A tube connecting structure C1 including a gasket member 10 having annular, tub recesses 12, 13 tube members 20, 30 having folded edge portions 22, 32 formed by folding ends thereof over the outer circumference so that convex ends 23, 33 are brought into tight contact with the annular recesses of the gasket member, outer rings 40, 50 mounted onto the outer circumference of body portions 21, 31 of the respective tube members 20, 30 so that front ends 41, 51 are located behind the convex ends of the folded edge portions and rear ends 42, 52 are out of the folded edge portions, presser members 60, 70 having contact sections 61, 71 with the gasket member and outer ring pressing sections 62, 72 for pushing the rear ends of the outer rings toward the mating outer ring, and a clamp member 80 for compressing the respective presser members together with the gasket member.

Abstract: The flow control valve (10) has a body (11) and a valve mechanism (40). The body defines a chamber (20). The chamber involves an inlet (12) for receiving fluid to control, a valve seat (16) for passing the fluid, and an outlet (15) for discharging the fluid. The valve mechanism consists of a valve plug (41) for opening and closing the valve seat, a first diaphragm (50) arranged in the vicinity of the inlet, and a second diaphragm (60) arranged in the vicinity of the outlet. Each of the diaphragms is in the chamber and has a periphery fixed to the body. The diaphragms divide the chamber into a first pressure chamber (21) outside the first diaphragm, a valve chamber (25) between the diaphragms, and a second pressure chamber (30) outside the second diaphragm. The valve chamber includes the inlet, valve seat, and outlet.

Abstract: A manifold valve has an intake for receiving a secondary fluid, a passage upwardly extending from the intake, a valve unit for opening and closing a top end of the passage, and a main channel having an opening on a bottom wall thereof, the opening facing the top end of the passage. The secondary fluid is upwardly supplied into the main channel through the intake, passage, and opening when the valve unit opens the top end of the passage and is stopped when the valve unit closes the top end of the passage.