Wire bonding spool system
AssigneeOrthodyne Electronics Corporation
InventorTheodore J. Copperthite
Life of this patent
Estimating the term…
Abstract
A wire dereeler for an ultrasonic wire bonder with a bond head has a support for rotatably supporting a reel of wire driven by a stepper motor in incremental steps. Two rollers receive the wire therebetween and are driven by a motor drive for rotating or torquing the rollers and tensioning the wire placed between the rollers. A linkage generally aligns the rollers in parallel with the wire therebetween. A photoelectric sensor determines a given amount of wire at a position between the bond head and the rollers and provides a signal for controlling the stepper motor driving the reel of wire.
Claims22
An ultrasonic wire bonder comprising:
- a bonding head with an ultrasonic wire bonding tool for bonding wire paid out from a reel to an electrical component;
- an electric drive for rotating said reel;
- a tensioner comprising at least one roller and a second surface for providing tension by said roller contacting and nipping the wire between said second surface and said roller for creating positive tension in wire from said reel;
- and,
- an electromotive drive for driving said tensioner in order to tension wire being paid out from said reel.
A wire dereeler for an ultrasonic wire bonder comprising:
- a drive for driving a reel of wire to be bonded;
- a tensioner to maintain tension on the wire being paid off of the reel;
- a sensor comprising a light source and a photoelectric sensor for sensing light from said wire with respect to a particular position for sensing a given amount of wire;
- and,
- a controller for controlling said drive based upon the amount of wire sensed.
A wire dereeler for an ultrasonic wire bonder with a bond head comprising:
- a support for supporting a reel of wire to be bonded;
- a stepper motor for driving said reel in incremental steps;
- at least two rollers for receiving wire from said reel therebetween;
- a motor for driving at least one of said rollers and tensioning wire placed between said rollers;
- a linkage for aligning said rollers substantially in parallel;
- a photoelectric sensor for determining an amount of wire at a position between the bond head and said rollers;
- and,
- a controller for controlling said stepper motor driving said reel.
A method for dereeling wire for an ultrasonic wire bonder having a bond head comprising:
- supporting a reel of wire for bonding purposes;
- driving said reel in stepped increments;
- tensioning said wire from said reel by at least two rollers through which the wire passes;
- torquing said rollers with wire therebetween;
- sensing an amount of wire to be fed to'said bond head by a photoelectric sensor;
- and,
- controlling the amount of wire from said reel in response to the amount of wire sensed.
Dependencies are inferred from the claim text.