Emerson, Peter James

In a method for monitoring a plasma output from a plasma device used to clean an object, a first wavelength of light emitted by the plasma output to be monitored is identified and an intensity of the first wavelength of light is sensed. A second wavelength of light emitted by the plasma output is also identified to be used as a baseline, and an intensity of the second wavelength of light is sensed. The intensities of the first and second wavelengths of light are then compared to determine whether their relationship falls within an acceptable threshold.

A wire threading device (100) for automatically threading a bonding wire (50) in a wire bonding apparatus (10) includes a wire guiding block (110, 120, 130) configured to form a guiding channel (110a, 120a, 130a) for directing a bonding wire (50) during a threading process and a slot (110b, 120b, 130b) connected to the guiding channel (110a, 120a, 130a) to release the bonding wire (50) after the threading process, wherein wire guiding block (110, 120, 130) is positioned between an air tensioner (11) and a bonding tool (15) of the wire bonding apparatus (10) in use to guide the bonding wire (50) from the air tensioner (11) to the bonding tool (15), and a pneumatic wire pulling mechanism comprising a plurality of air channels (121b, 122b) extending in directions that intersect an axial direction of the guiding channel, the pneumatic wire pulling mechanism being configured to apply a plurality of pulling forces on the bonding wire via the air channels, enabling the bonding wire to be pulled into and through the guiding channel during the threading process.

A wire threading method for automatically threading a bonding wire in a wire bonding apparatus includes the following steps: feeding a length of the bonding wire from a wire spool into an air path device; tensioning the bonding wire with an airflow generated in the air path device and simultaneously guiding a wire tail of the bonding wire to an operation location with the air path device; gripping and straightening the wire tail at the operation location with a wire manipulating device; conveying the straightened wire tail to a threading location with the wire manipulating device; and threading the straightened wire tail with a wire threading device through a bonding tool of the wire bonding apparatus.

A method for breaking a substantially planar workpiece having first and second major surfaces, with a metallization layer on the first major surface, comprises the steps of: i) forming a groove in the workpiece extending parallel to the plane, the groove being open at an upper surface of the workpiece, and then subsequently ii) applying a workpiece breaking force to the first major surface of the workpiece to crack the workpiece along a break line coincident with the groove, then iii) applying a metallization breaking force to the second major surface of the workpiece to break the metallization layer along the break line.

An intrinsic parameter testing tool for measuring intrinsic parameters or validating intrinsic parameter calibration of a camera under test, comprises a camera support for mounting a camera under test such that its optical axis extends outwardly therefrom in a predetermined direction, a collimator support, and a plurality of infinity-focused collimators mounted on the collimator support, each collimator of the plurality of collimators being positioned relative to the collimator support so that the camera mounted on the camera support may obtain an image of a target surface, the image comprising a plurality of sub-images corresponding to sub-regions of the target surface, each sub-image being obtained from light passing through a respective collimator of the plurality of collimators, wherein the collimator support is movably mounted so that it may be independently rotated about two rotary axes, the first, azimuthal, rotary axis being parallel to the optical axis of the camera when mounted on the camera support and the second rotary axis being substantially orthogonal to the first rotary axis.

Separation between a printing screen or stencil and at least one singulated workpiece following a printing operation is controlled by selective vertical actuation of a surround plate. In particular, an upward force may be supplied to the surround plate following printing, before and / or during separation. Drive means are provided to control movement of the surround plate, which may conveniently be located intermediate the surround plate and a conveyance unit.

A printing screen for SMT applications at least partially comprising graphene, optionally in the form of carbon nanotubes.

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