Die bonder apparatus

Claim 2

A die bonder for picking up a die at a die pick-up position and transporting it to a bonding position, said die bonder comprising a vacuum quill for picking up the die, a ram arm carrying said vacuum quill on one end thereof, and means for moving said ram arm and vacuum quill in a straight line between the die pick-up position and the bonding position, said means including a first and a second support mechanism, each support mechanism including a yoke pivotally coupled at one end to said ram arm at a point spaced apart from the point at which the yoke of the other support mechanism is coupled to the ram arm, a compensating arm pivotally coupled at one end to the other end of the yoke and pivotally mounted at the other end at a fixed point on the die bonder, and an oscillatory link coupled mounted at one end to the yoke at a midposition thereof and pivotally mounted at the other end at a fixed point on the die bonder, said means further including an oscillatory driver link pivotally mounted at one end at a fixed pivot point on the die bonder and coupled at the other end to the yoke of one of said support mechanisms, said oscillatory driver link having a cam follower mounted thereon, a drive cam for controlling the movement of said cam follower to drive said oscillatory driver link and in turn drive said one of said support mechanisms, and cam driver means for rotating said drive cam.

Claim 3

A die bonder as in claim 1 wherein said cam follower comprises a pair of rollers rotatably mounted on a common shaft, one of said rollers engaging one side of a Cam groove in said drive cam and the other of said rollers engaging the opposite side of said cam groove.

Claim 4

A die bonder as in claim 2 wherein the diameter of one of said rollers is larger than the diameter of the other of said rollers.

Claim 5

A die bonder as in claim 2 including means for moving said vacuum quill in a vertical motion on the end of said ram arm to pick up the die on the end of the vacuum quill, said last-mentioned means comprising a push rod mounted for lateral movement on said ram arm, means for coupling one end of said push rod to said vacuum quill to convert to and fro lateral movement of the push rod into up and down vertical movement of the vacuum quill, and cam follower means including a roller for engaging another surface on said drive cam and including a member coupled to said roller and to said push rod for imparting lateral motion to the push rod.

Claim 6

A die bonder as in claim 1 including means for moving said vacuum quill in a vertical motion on the end of said ram arm to pick up the die on the end of the vacuum quill.

Claim 7

A die bonder as in claim 5 wherein said last-mentioned means comprises a push rod mounted for lateral movement on said ram arm, means for coupling one end of said push rod to said vacuum quill to convert to and fro lateral movement of the push rod into up and down vertical movement of the vacuum quill, and cam follower means for engaging said drive cam, said last-mentioned cam follower means being coupled to said push rod for imparting lateral motion to the push rod.

Claim 8

A die bonder as in claim 1 including an indexing mechanism for feeding an object to the bonding position where the die may be bonded to the object, said indexing mechanism comprising object driver means for moving the object relative to the bonding position, means responsive to movement of the object to the bonding position for enabling said cam driver means, and means responsive to subsequent operation of said cam driver means in rotating said drive cam for operating said object driver means to move the object relative to the bonding position.

Claim 9

A die bonder as in claim 7 including clamping means responsive to operation of said cam driver means for holding the object at the bonding position.

Claim 10

A die bonder as in claim 8 wherein said object driver means includes a stepping motor and at least one pair of rollers for engaging the object, at least one of said last-mentioned rollers being driven by said stepping motor.

Claim 11

A die bonder as in claim 9 wherein said clamping means includes a solenoid, a clamping structure operated by the solenoid to clamp the object, and means operated by said clamping structure for disengaging said last-mentioned rollers from the object.

Claim 12

Apparatus for picking up an object at a pick-up position and transporting it to a delivery position, said apparatus comprising pick-up means for picking up the object, a ram arm carrying said pick-up means on one end thereof, and means for moving said ram arm and pick-up means in a straight line between the pick-up position and the delivery position, said last-mentioned means comprising a first and a second support mechanism, each support mechanism including a yoke pivotally coupled at one end to said ram arm at a point spaced apart from the point at which the yoke of the other support mechanism is coupled to the ram arm, a compensating arm pivotally coupled at one end to the other end of the yoke and pivotally mounted at the other end at a fixed point on said apparatus, and an oscillatory link pivotally coupled at one end to the yoke at a mid-position thereof and pivotally mounted at the other end at a fixed point on said apparatus, said means further including an oscillatory driver link pivotally mounted at one end at a fixed pivot point on said apparatus and coupled at the other end to the yoke of one of said support mechanisms, said oscillatory driver link having a cam follower mounted thereon, a drive cam for controlling the movement of said cam follower to drive said oscillatorY driver link and in turn drive said one of said support mechanisms, and cam driver means for rotating said drive cam.

Claim 13

Apparatus for picking up an object at a pick-up position and transporting it to a delivery position, said apparatus comprising pick-up means for picking up the object, a ram arm carrying said pick-up means on one end thereof, and means for moving said ram arm and pick-up means in a straight line between the pick-up position and the delivery position, said last-mentioned means comprising a first and a second support mechanism, each support mechanism including a yoke pivotally coupled at one end to said ram arm at a point spaced apart from the point at which the yoke of the other support mechanism is coupled to the ram arm, a compensating arm pivotally coupled at one end to the other end of the yoke and pivotally mounted at the other end at a fixed point on said apparatus, and an oscillatory link pivotally coupled at one end to the yoke at a mid-position thereof and pivotally mounted at the other end at a fixed point on said apparatus, said means further including an oscillatory driver link pivotally mounted at one end at a fixed pivot point on said apparatus and coupled at the other end to the yoke of one of said support mechanisms, said oscillatory driver link having a cam follower mounted thereon, a drive cam for controlling the movement of said cam follower to drive said oscillatorY driver link and in turn drive said one of said support mechanisms, and cam driver means for rotating said drive cam.

Claim 14

Apparatus as in claim 11 including means for moving said pick-up means in a vertical motion on the end of said ram arm to pick up the object, said lastmentioned means comprising a push rod mounted for lateral movement on said ram arm, means for coupling one end of said push rod to said pick-up means to convert to and fro lateral movement of the push rod into up and down vertical movement of the pick-up means, and means coupled to said push rod for imparting lateral motion to the push rod.

Claim 15

Apparatus as in claim 11 including an indexing mechanism for feeding a device to the delivery position where the object may be mounted on the device, said indexing mechanism comprising device driver means for moving the device relative to the delivery position, enabling means responsive to movement of the device to the delivery position for enabling said cam driver means, and means responsive to subsequent operation of said cam driver means in rotating said drive cam for operating said device driver means to move the device relative to the delivery position.

Claim 16

Apparatus as in claim 13 wherein said enabling means comprises optic means for sensing the presence of the device at the delivery position.

Claim 17

Apparatus as in claim 14 wherein said optic means includes a fiber optic bundle positioned at the delivery position for detecting light reflected from the device.

Claim 18

Apparatus as in claim 13 including a clamping mechanism operated in response to said cam driver means to hold the device at the delivery position.

Claim 19

Apparatus as in claim 16 wherein said device driver means includes a stepping motor and at least one pair of rollers driven by said stepping motor for driving the device.

Claim 20

Apparatus as claimed in claim 17 wherein said clamping mechanism includes a solenoid, a clamping structure operated by the solenoid to clamp the device, and means operated by said clamping structure for disengaging said last-mentioned rollers from the device.

Claim 21

Apparatus as in claim 11 including means for moving said pick-up means in a vertical motion on the end of said ram arm to pick up the object.

Claim 22

Apparatus as in claim 19 wherein said last-mentioned means comprises a push rod mounted for lateral movement on said ram arm, means for coupling one end of said push rod to said pick-up means to convert to and fro lateral movement of the push rod into up and down vertical movement of the pick-up means, and cam follower means for engaging said drive cam, said last-mentioned cam follower means being coupled to said push rod for imparting lateral motion to the push rod.

Claim 23

Apparatus as in claim 11 wherein said cam follower comprises a pair of rollers rotatably mounted on a common shaft, one of said rollers engaging one side of a cam groove in said drive cam and the other of said rollers engaging the opposite side of said cam groove.

Claim 24

Apparatus as in claim 21 wherein the diameter of one of the rollers of said cam follower is larger than the diameter of the other of the rollers of the cam follower.

Claim 25

Apparatus for picking up an object at a pick-up position and transporting it to a delivery position, said system comprising pick-up means for picking up the object, a transfer arm carrying said pick-up means at one end thereof, and first means for moving said transfer arm and pick-up means in a straight line between the pick-up and delivery positions, said first means comprising first and second linkage mechanisms each pivotally coupled at one end to said transfer arm and each pivotally mounted at another end at a fixed position on said apparatus, an oscillatory drive link pivotally coupled at one end to one of said first and second linkage mechanisms, a first cam follower mounted on said oscillatory drive link, a first cam for controlling the movement of said first cam follower to drive said oscillatory drive link and in turn said first and second Linkage mechanisms and transfer arm, and cam drive means for rotating said first cam.

Claim 26

Apparatus for picking up an object at a pick-up position and transporting it to a delivery position, said system comprising pick-up means for picking up the object, a transfer arm carrying said pick-up means at one end thereof, and first means for moving said transfer arm and pick-up means in a straight line between the pick-up and delivery positions, said first means comprising first and second linkage mechanisms each pivotally coupled at one end to said transfer arm and each pivotally mounted at another end at a fixed position on said apparatus, an oscillatory drive link pivotally coupled at one end to one of said first and second linkage mechanisms, a first cam follower mounted on said oscillatory drive link, a first cam for controlling the movement of said first cam follower to drive said oscillatory drive link and in turn said first and second Linkage mechanisms and transfer arm, and cam drive means for rotating said first cam.

Claim 27

Apparatus as in claim 23 wherein said first cam follower comprises a pair of rollers rotatably mounted on a common shaft, one of said rollers engaging one side of a groove in said first cam and the other of said rollers engaging the opposite side of said groove.

Claim 28

Apparatus as in claim 24 wherein the diameter of one of said rollers is larger than the diameter of the other of said rollers.

Claim 29

Apparatus as in claim 23 including second means for moving said pick-up means vertically at said one end of said transfer arm to pick up the object.

Claim 30

Apparatus as in claim 26 wherein said second means comprises a push rod mounted for lateral movement on said transfer arm, means for coupling one end of said push rod to said pick-up means to convert forward and backward lateral movement of the push rod into upward and downward vertical movement of the pick-up means and a second cam follower comprising a roller engaging a surface of said first cam and further comprising means for imparting lateral movement to said push rod.

Claim 31

Apparatus as in claim 23 including an indexing mechanism for feeding a device to the delivery position whereupon the object may be mounted upon the device, said indexing mechanism comprising device drive means for moving the device relative to the delivery position, control means responsive to movement of the device to the delivery position for enabling said cam drive means and responsive to subsequent operation of the cam drive means for operating said device drive means to move the device relative to the delivery position.

Claim 32

Apparatus as in claim 28 wherein said control means includes optical means for sensing the presence of the device at the delivery position.

Claim 33

Apparatus as in claim 29 wherein said optical means includes a fiber optic bundle positioned at the delivery position for detecting light reflected from the device.

Claim 34

Apparatus as in claim 28 including clamping means responsive to movement of the device to the delivery position for holding the device at the delivery position.

Claim 35

Apparatus as in claim 31 wherein said device drive means comprises at least one pair of rollers for engaging the device and a stepping motor for driving at least one of said pair of rollers.

Claim 36

Apparatus as in claim 32 wherein said clamping means comprises a solenoid, a clamping structure operated by said solenoid to clamp the device in the delivery position, and means operated by said clamping structure to disengage at least one of said pair of rollers from the device.

Claim 37

Apparatus as in claim 23 wherein each of said first and second linkage mechanisms comprises a yoke member pivotally coupled at one end to said transfer arm, a compensating link pivotally coupled at one end to the other end of said yoke member and pivotally mounted at the other end at a fixed position on said apparatus, an oscillatory link pivotally coupled at one end to a mid-portion of said yoke member and pivotally mounted at the other end at a fixed position on said apparatus, and wherein the yoke members of said first and second linkage mechanisms are pivotally coupled to said transfer arm at spaced apart positions thereon.