Asm Technology Singapore Pte Ltd

Asm Assembly Automation Limited

Gang Ou

Ka Shing Kenny Kwan

Gary Peter Widdowson

Ajit S Gaunekar

You Yong Liao

Ajit Gaunekar

Dongsheng Zhang

Yong Xin Wang

Wai Chuen Gan

Hon Yu Peter Ng

Man Chan

Chong Hao Chen

Bao Nian Zhai

Wen Chen

Shing Wai Tam

Tin Kwan Bobby Chan

Wang Hay Kenneth Tsui

Yun Bo He

Dong Sheng Zhang

A wire bonding apparatus, comprising a bonding tool mounted on a bondhead body which is in turn mounted on a positioning table, is provided for bonding electronic devices. The positioning table has first and second motors coupled to it that are operative to drive the bondhead body to positions along respective first and second orthogonal axes. The bondhead body is connected to the positioning table through a pivot such that the bondhead body is rotatable relative to the positioning table about a third axis which is substantially orthogonal to the first and second axes. Further, a third motor drives the bondhead body to rotate about the third axis.

Wire bonding apparatus comprising rotary positioning stage

A robotic arm assembly is provided comprising a driving mechanism including a rotor which is rotatable relative to a stator. The rotor is coaxially rotatable about a columnar shaft having a substantially hollow central longitudinal axis. A first arm having proximal and distal pivotal ends is rigidly mounted on the rotor such that the first arm is drivable to rotate by the driving mechanism. A proximal pivotal end of a second arm having proximal and distal pivotal ends is pivotally connected to the proximal pivotal end of the first arm. A first timing pulley is mounted coaxially onto the columnar shaft, and a second timing pulley which is spaced from the first pulley is drivable to rotate together with rotation of the first arm. A timing belt connects the first and second timing pulleys and is operative to rotate the second arm relative to the first arm as the first arm is driven to rotate by the driving mechanism, such that the distal pivotal ends of the first and second arms are configured to always lie along a substantially straight line.

Robotic arm driving mechanism

A bonding apparatus is provided comprising a bonding stage for holding a bonding tool, an air distribution system mounted to the bonding stage and an air inlet attached to the air distribution system. The air distribution system is connected to the air inlet for receiving air from the air inlet, and is operative to pass the air over multiple surfaces of the bonding stage for the purpose of temperature control.

Temperature control of a bonding stage

A method for damping vibrations in a stepper motor with micro-stepping control which comprises the steps of identifying the force amplitudes and phase shifts of multiple harmonic detent torques of the stepper motor, such as the first, second and fourth harmonic detent torques, and tuning the stepper motor with different current commands until minimum friction and resistive torque are obtained. Thereafter, a compensating harmonic current derived from said force amplitudes and phase shifts of the said multiple harmonic detent torques is injected into a current command during operation of the stepper motor to compensate for torque ripples.

Model-based active electronic damping for stepper motors

An apparatus and method for automatically controlling a clamp gap between clamping arms of a wire clamp is provided wherein a motor generates an actuation force for moving the clamping arms relative to each other. A resilient member is positioned such that the actuation force acts upon and flexes the resilient member to an extent that is proportional to the clamp gap, and the clamp gap is controlled by adjusting the amount of actuation force according to a predetermined relationship between the actuation force and the clamp gap.

Wire clamp gap control mechanism and method

A direct drive robotic manipulator is provided which includes a plurality of segments that are rotatably coupled with respect to one another. A plurality of spindles connects the segments for relative rotation therebetween, and a plurality of direct drive assemblies is further coupled to the plurality of spindles. Each direct drive assembly encloses an end of a spindle and comprises a rotor assembly to which the spindle is attached for manipulating the spindle. A positional measurement apparatus may also be included at each direct drive assembly to ascertain an angular disposition of a segment relative to an adjoining segment.

Direct drive robotic manipulator

A die ejector system and method for removing a die from an adhesive surface. The system includes an ejector tool that is operative to move relative to the die whereby to push the die. The ejector tool may consist of a collet holder and an ejector pin array. A shaft holds the ejector tool and is in turn coupled to a forcer of a linear motor. The forcer is movable relative to a stator of the linear motor flexure bearings coupled to the shaft guide movement of the ejector tool relative to the die. After the die is pushed by the ejector tool, a die pick-up device removes the die from the adhesive surface.

Die ejector system using linear motor

An apparatus and method are provided for attenuating vibration when driving an object. The apparatus includes a driving device for generating a driving force to drive the object and an attenuation actuator mounted in reciprocal relationship with the driving device for generating an attenuation force substantially concurrently with the generation of the driving force. The attenuation force is generated so as to oppose and at least partially cancel a reaction force exerted by the object in response to the driving force.

Active vibration attenuation

The invention provides a motor system and a method for positioning a load. The system comprises support means such as an XY table for supporting the load. A first motor and a second motor cooperate to drive the load, whereby the first motor is adapted to provide higher thrust than the second motor and the second motor is adapted to deliver higher positioning accuracy than the first motor during a positioning sequence to position the load.

Motor system for positioning a load

Force sensing apparatus is provided for sensing deflection of a transducer in an ultrasonic welding machine. The apparatus includes a body member, a transducer holder and a force sensor. The transducer holder is adapted to hold an ultrasonic transducer and the transducer holder is fixed to the body member. The force sensor is located between adjacent surfaces of the body member and the transducer holder to sense a force applied between the surfaces.

Force sensing apparatus

Force sensing apparatus is provided for sensing deflection of a transducer ( ) in an ultrasonic welding machine. The apparatus includes a body member ( ), a transducer holder ( ) and a force sensor ( ). The transducer holder ( ) is adapted to hold an ultrasonic transducer ( ) and the transducer holder ( ) is fixed to the body member ( ). The force sensor ( ) is located between adjacent surfaces ( ) of the body member ( ) and the transducer holder ( ) to sense a force applied between the surfaces ( ).

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Singapore, Singapore

Gang Ou