摘要:
PROBLEM TO BE SOLVED: To provide a gas gage improving sensibility measuring partial differences of profiles for wafers for usage in a lithographic device. SOLUTION: The gas gauge includes a gas delivery pipe arranged so as to divide a distance up to an object. The gas delivery pipe includes a gas conduit, and supplies a proper measuring gas through the gas conduit. The measuring gas is discharged from the gas delivery pipe through an outlet under a pressure to collide with the object in an interaction region and the pressure of a rebounded gas is measured by a pressure detector. The gas having a small atomic number is used. A pressure sensor includes a thin film arranged in the gas delivery pipe at least partially surrounding the gas conduit in a gas outlet or a vicinity of the gas outlet. The pressure sensor includes a thin-film disk arranged around the gas conduit. The pressure sensor is disposed substantially on a common surface, and isolated from the gas conduit but includes a plurality of proper pressure elements for surrounding the gas conduit. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To solve the problem that it takes a time to discriminate a distance, because many times necessary for completion of a back pressure rise are needed if the distance to an object to be detected becomes not more than 10 μm. SOLUTION: In a deposition distance determination device, a regulator 1 to be set a detection pressure is mounted inside or outside, and a two port solenoid valve 2 to cut a supply air is mounted. Further, in secondary side of the two port solenoid valve 2, a pressure transducer 3 (a pressure sensor, a pressure switch, a pressure transducer or the like) is mounted. A control circuit which controls the two port solenoid valve 2 and the pressure transducer 3 is installed. A piping into a detecting orifice which is prepared a detection surface of the object to be detected is mounted. And from the orifice 5 to the object to be detected, air is made to flow. For the two port solenoid valve 2, either normal open type or normal close type can be used, in this case, what is necessary is to control so as to intercept air, whenever performing detection on the control circuit. For an error due to temperature of the pressure transducer 3, correction can be made by using air temperature sensor inside the piping, and temperature sensor at outside of the piping. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a position checking apparatus having a short cycle time and a high pressure resistance, which prevents any nozzle from clogging or any rust from arising when stopping supplying a detection pressure and a blow-use air. SOLUTION: The position checking apparatus comprises: a detection pressure channel 23 being in communication with both an upstream port 24 which is connected to a pressure source 25, and a downstream port 22 which is connected to a detection hole 21 disposed at a table 20; a detection orifice 26 disposed in the detection pressure channel 23; and a differential pressure detecting means 27 for detecting a difference pressure between anteroposterior regions of the detection orifice 26. The differential pressure means 27 detects the difference pressure between the anteroposterior regions of the detection orifice 26 which varies according to a clearance between the detection hole 21 disposed at the table 20 and an detection work W mounted on the table 20. COPYRIGHT: (C)2008,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a gas gauge proximity sensor having a choked flow orifice for sensing a difference between a reference surface standoff and a measurement surface standoff. SOLUTION: Unlike an existing proximity sensor, the gas gauge proximity sensor of the present invention replaces the use of a mass flow controller with the choked flow orifice. The use of the choked flow orifice provides a reduction in device cost and an improved system reliability. A gas supply forces gas into the proximity sensor. The gas flow is forced through the choked flow orifice so as to achieve a sonic condition at which a mass flow rate becomes largely independent of pressure variations. The flow of gas proceeds from the choked flow orifice into a sensor flow channel system. A mass flow sensor within the sensor flow channel system monitors the flow rate to detect the measurement standoffs that can be used to initiate a control action. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method and system that can make an air gauge operate always at an advantageous standoff and can perform measurement so as to maximize the performance and useful measuring range. SOLUTION: The system includes the air gauge configured to detect the distance to a surface of the object and a sensor configured to measure at least one from the group including a relative position of the air gauge and a relative position of the surface of the object. Outputs of the air gauge and the sensor are combined to produce a combined air gauge reading. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To measure a gap of a die head and a coating surface without injuring the die head or the coating surface. SOLUTION: Measurement blocks 110 are provided on both ends of the die head 100 and air is delivered from an air hole 111 of the measurement block 110. A pressure resistance value of air generated when the air is delivered is measured by a differential pressure gage 120 and a gap dimension is operated from the pressure resistance value. A signal measured by the differential pressure gage is transmitted to a control device 170 and the control device 170 operates a die head movement mechanism 180 such that difference of a previously set pre-set value and the measurement value is eliminated. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a fluid gauge proximity sensor which is substantially not influenced by external noise, capable to operate in any environment, regardless of the sort or the exposure wavelength of a resist on a surface of a workpiece. SOLUTION: This fluid flow proximity gauge comprises a source of a modulated unidirectional fluid flow or alternating fluid flow; at least one path, having a nozzle and a flow sensor or pressure sensor mounted thereon; the fluid exists at a gap between the nozzle and a target; the flow sensor or the pressure sensor outputs an amplitude modulated signal that varies in accordance with the size of the gap. COPYRIGHT: (C)2006,JPO&NCIPI