Abstract:
Methods and apparatus for spectrum-based endpointing. An endpointing method includes selecting two or more reference spectra. Each reference spectrum is a spectrum of white light reflected from a film of interest on a first substrate and has a thickness greater than a target thickness. The reference spectra is selected for particular spectra-based endpoint determination logic so that the target thickness is achieved when endpoint is called by applying the particular spectra-based endpoint logic. The method includes obtaining two or more current spectra. Each current spectrum is a spectrum of white light reflected from a film of interest on a second substrate when the film of interest is being subjected to a polishing step and has a current thickness that is greater than the target thickness. The method includes determining, for the second substrate, when an endpoint of the polishing step has been achieved.
Abstract:
A method of determining the position of a blockage (192, 392) in a passage (15, 313) having a first end and a second end. The method comprises blowing a sealing device (200) into the passage to form a seal adjacent the blockage (192, 392), then blowing a gas into the passage from the first end, making at least one measurement concerning the gas blown into the passage from the first end and determining a distance D between the first end and the sealing device using the at least one measurement.
Abstract:
The weaponry camera sight has a digital electronic display of the sight picture for the shooter. The display may be magnified as desired, thereby eliminating need for a scope sight. The device may also include a range finding device, with range information being provided on screen. The camera may also be used to record the image viewed on screen, if so desired. Remotely situated controls may be provided for operating the zoom magnification and recording feature, thereby allowing the shooter to operate the present camera sight without need to move his or her hands on the weapon. The present camera sight is particularly well suited for use with an archery bow, but may be used with a firearm if so desired.
Abstract:
A method for determining a material layer thickness transmissive to infrared (IR) energy in a semiconductor wafer manufacturing process including providing at least one semiconductor wafer comprising an IR transmissive layer; passing IR energy through the IR transmissive layer to produce at least one Fourier transform infrared (FTIR) spectrum; and, determining an amount of the IR transmissive layer present according to an amount of IR energy absorbed by a predetermined contributing characteristic vibrational mode portion of the FTIR spectrum.
Abstract:
An apparatus is provided for accurately sensing the presence of an end of a wire in a position for stripping insulation therefrom or crimping a terminal thereto. The apparatus comprises a housing having an aperture extending therethrough for delivering a flow of low pressure air. A target is pivotally mounted to the housing and can undergo a small range of pivotal movement. The flow of air through the housing will urge the target to one extreme position in its range of pivotal movement. However, the end of a wire urged into contact with the target will cause the sensor target to pivot through its range of movement into a position for blocking the flow of air through the housing. Back pressure created by the blockage of air through the housing will be sensed by appropriate apparatus to initiate portions of the apparatus for stripping insulation from the wire or crimping a terminal thereto.
Abstract:
A device for measuring interference and wall thickness of a half cylindrical plain bearing includes a bearing support block provided with a substantially semi-cylindrical shaped recess for receiving the plain bearing, a pressing mechanism for closely pressing the plain bearing against the recess, a substantially semi-columnar shaped wall thickness measuring head having a smaller outer diameter than the inner diameter of the plain bearing when it closely contacts with the recess, and a positioning mechanism for establishing a predetermined positional relationship between the recess and the wall thickness measuring head upon measurement. The bearing support block carries a detector or detectors for measuring interference of the half cylindrical plain bearing, and the wall thickness measuring head incorporates measuring instruments such as air micrometers.
Abstract:
An apparatus and process are disclosed for the contactless measurement of the volume of a layer of wet, electrically resistive material that is deposited on a rigid substrate support, where the deposit of said electrically resistive material has a known length and width. The apparatus measures the topological thickness of the deposit of electrically resistive material by means of a pneumatic gas system that has an outlet, positioned above the deposit on the substrate, through which a jet of gas under pressure is directed downwardly against the deposit and the substrate. The outlet for the pneumatic gas jet is constructed to be homothetic to the width and length of the deposit. An apparatus is provided for selectively moving and changing the position of the deposit and its support relative to the pneumatic gas system, so that the gas jet may be sequentially directed either at the deposit or the bare substrate while a constant pressure measurement is maintained, whereby to determine the difference in distances from the gas jet outlet to the upper surface of the deposit or to the bare substrate, so as to obtain a measure of the topological thickness of the deposit.
Abstract:
Cigarette-rod weight monitoring system in which the signals from a scanner, e.g. a nucleonic device such as Molins "MODIC", are processed and stored in a memory in a digitized form, and the memory contents are used to drive an analog display device. These signals, which represent the individual cigarettes, or short lengths, are accumulated in the memory over a period which is sufficiently long for a statistically significant distribution pattern to be achieved, so that the shape of the distribution curve can be observed to determine whether it is "normal" or whether any skews or other irregularities are present. In addition the accomulated signals can be analyzed in various ways to provide quantitative measurements of overall standard deviation, or effective standard deviation either side of the mean to show whether any "skews" exist. S.D. can be calculated for whole cigarettes or short lengths for different diagnostic purposes.
Abstract:
A caliper gauge for continuously measuring the thickness of a moving layer in which a sensing head is held at a uniform spacing from a layer of material being measured by a pneumatic piston positioned by a feedback control system responsive to a comparison between a reference pneumatic nozzle and a pneumatic nozzle in the sensing head facing the layer being measured. The distance of the sensing head from an electrical conductor underlying the layer being measured is monitored electromagnetically to derive layer thickness.
Abstract:
A fluidic device in the form of a precise position indicator for indicating at a remote and separate location the precise travel of a tool, a table, a grinding wheel or other variable in relation to other stationary elements of a machine and including, e.g., with conventional lathe parts, a tool slide means and a stationary slide means, an actuating rod element secured to the tool slide means by a clamping means such that the actuating rod element moves forward simultaneously with said tool, and actuating means adjustably secured to said rod in contacting engagement with a piston for depression of an actuating cylinder to displace hydraulic fluid through a tube into a zeroing cylinder and through a connecting tube into a slave cylinder, forcing a piston rod into the base of a dial indicator adaptor means connected to the slave cylinder to produce a read off on a dial indicator affixed to the adaptor means.