CN2342364Y

CN2342364Y - Tester for pulling force

Info

Publication number: CN2342364Y
Application number: CN 98218628
Authority: CN
Inventors: 张顺郎; 王浩毅
Original assignee: TAIZHONG SANYANG ELECTRONICS CO Ltd
Current assignee: TAIZHONG SANYANG ELECTRONICS CO Ltd
Priority date: 1998-08-21
Filing date: 1998-08-21
Publication date: 1999-10-06
Anticipated expiration: 2008-08-21

Abstract

The utility model relates to a tester for pulling force. The utility model is composed of a frame, a swinging arm, an action arm, a linkage mechanism and a pulling force mechanism, wherein a sleeve barrel is arranged on the frame, two ends of the sleeve barrel are combined with the frame through pivot shafts, the swinging arm is arranged in the sleeve barrel, the lower part of the swinging arm is provided with the action arm, and the pulling force mechanism is combined between the swinging arm and the action arm. When the action arm orderly longitudinally descends, transversely moves and longitudinally rises, an aluminum wire welded by a wafer and a conducting wire frame is hooked by a crochet hook, the utility model utilizes reaction force of the upward force of the swinging arm to hook and pull the aluminum wire, the reaction force is generated by the action arm, and the binding strength among the aluminum wire, the wafer and the conducting wire is tested.

Description

Device for testing tensile force

The utility model is relevant a kind of device for testing tensile force, refers to a kind of device for testing tensile force whether bond strength between aluminum steel and wafer and lead frame reaches demand of testing especially.

Because making rapid progress of electronics technology, in the past must be by many large-scale electronic circuits in conjunction with the work that just can finish gradually by amassing into circuit (inte-grated circuit, abbreviation IC) replaces, its outstanding feature of IC is that the semiconductor construction that its volume ratio makes with the element that separates is little of thousands of times, also thereby make the electronic product volume-diminished made from IC many; General IC the lead frame of wafer and bearing wafer make respectively finish after, must earlier wafer be incorporated on the lead frame, again aluminum steel is welded in respectively on lead frame and the wafer, so that the pin on the lead frame can be via the circuit turn-on of aluminum steel and wafer, and after bonding wire is finished, lead frame inserted in the model and pour into black resin, treat that black resin is heated and cut after becoming solid, promptly become general common IC individuality.

Because the pin of lead frame is to utilize aluminum steel signal to be conveyed in the circuit of wafer to do computing, therefore, when the signal of pin can't correctly be passed in the circuit of wafer, wafer promptly may cause the circuit computing mistake because of the signal mistake of pin, more severe patient then may cause wafer to burn, and aluminum steel commonly used is because of welding the test of not making bond strength when finishing at its pad with wafer and lead frame, therefore, in the subsequent manufacturing processes of IC, promptly may produce the phenomenon that aluminum steel comes off or is out of shape because of the bond strength deficiency of pad, cause in the test after the IC manufacturing is finished, because of the signal of pin can't be passed in the wafer by aluminum steel, and make IC become defective products, thereby improve fraction defective and the manufacturing cost of IC, concerning the dealer, real is the puzzlement greatly of one on making.

The purpose of this utility model, being provides a kind of device for testing tensile force for solving the above problems, and uses the bond strength between test aluminum steel and wafer and lead frame, with the rate of reducing the number of rejects and seconds, reduces manufacturing cost.

The purpose of this utility model is achieved by the following technical solution.

The utility model is used to be arranged on wafer and lead frame welding engineering track top afterwards on the board, mainly by frame, swing arm, movement arm, interlinked mechanism and tensile machine constitute, insert swing arm in the sleeve of installing on this frame, there is movement arm the below of swing arm, and movement arm, swing arm and sleeve then run through fixing with a pivot, end one side and the opposite side top of swing arm are convexly equipped with first pinch roller and second pinch roller respectively, and utilize first cam of interlinked mechanism to press first pinch roller with power source, and second cam presses second pinch roller, driven swing arm and movement arm and done horizontal and vertical moving, thereby when the crochet hook of movement arm front end hooks the aluminum steel that welds with wafer and lead frame, by the tensile machine of installing between swing arm and movement arm, can test whether bond strength meets the requirements between aluminum steel and wafer and lead frame.

Fig. 1 is a stereographic map of the present utility model;

Fig. 2 is a rear view of the present utility model;

Fig. 3 is an action synoptic diagram of the present utility model ();

Fig. 4 is an action synoptic diagram of the present utility model (two);

Fig. 5 is an action synoptic diagram of the present utility model (three);

Fig. 6 is an action synoptic diagram of the present utility model (four);

Fig. 7 is installed in stereographic map on the board for the utility model;

The synoptic diagram that Fig. 8 descends for the utility model movement arm;

Fig. 9 is the synoptic diagram of the utility model movement arm rotation;

Figure 10 is the action synoptic diagram () of the utility model movement arm test pulling force;

Figure 11 is the action synoptic diagram (two) of the utility model movement arm test pulling force.

Now reach accompanying drawing in conjunction with the embodiments the utility model is done a detailed description.

See also Fig. 1, Fig. 2, device for testing tensile force of the present utility model is made of frame 1, swing arm 2, movement arm 3, interlinked mechanism 4 and tensile machine 5, wherein,

The front end of frame 1 is provided with opening, and inserts sleeve 11 in opening, and respectively combines with frame 1 with pivot 12 in top, the ends two end of sleeve 11.

Swing arm 2 is to be placed in the sleeve 11, and the end that makes swing arm 2 protrudes from the other end of sleeve 11, and outside end one side direction of this swing arm 2, be convexly equipped with first pinch roller 21, second pinch roller 22 is then established in the opposite side top on protruding, and the end of this swing arm 2 and top are to combine with frame 1 with

spring

23,24 respectively, extend a Jiong shape groove 25 in the bottom of swing arm appropriate location in addition.

Movement arm 3 is to place swing arm 2 belows, and its end is placed in the Jiong shape groove 25 of swing arm 2, and runs through this movement arm 3, swing arm 2 and sleeve 11 simultaneously with pivot 31, and the front end of movement arm 3 then runs through and is provided with one and is the L shape crochet hook 32 of barb.

Interlinked mechanism 4, it is that power source 41 is set on frame 1, the eccentric position of first cam 42 and second cam 43 is also run through in the axle center 411 of this power source 41 simultaneously, and this first cam 42 is to be fixed in the top of first pinch roller 21 to press

first pinch roller

21,43 on second cam presses second pinch roller 22 with its side, and is provided with crowning 431 in the appropriate location of second cam, 43 sides.

Tensile machine 5, it is to be provided with holder 51 in the top of swing arm 2, and rise to the bait in holder 51 and to establish spring 52, the other end of spring 52 and hook are established the fixed bar 53 that is fixed in movement arm 3 tops, but then offer ammunition feed spring 52 and fixed bar 53 on this swing arm 2 and insert movable through hole 54, be provided with the adjustment button 55 that to adjust spring 52 tension force in addition in the top of this holder 51.

See also Fig. 3, when the axle center 411 of power source 41 drives

first cam

42 and 43 rotations of second cam, because first cam 42 is to press on first pinch roller 21, and this first pinch roller 21 is extended by end one side of swing arm 2, therefore, when first cam 42 rotates to its minor axis periphery when pressing first pinch roller 21, first pinch roller 21 promptly is not subjected to the strength that presses downwards, cause this swing arm 2 end can by and 1 set spring 23 strength of frame swing arm 2 ends are up drawn high, making swing arm 2 is that the rotation of lever center descends swing arm 2 head ends with the pivot 31 that runs through, and utilize 3 springs that combine 52 of swing arm 2 and movement arm to make swing arm 2 when descending, also drive movement arm 3 simultaneously to decline.See also Fig. 4, and rotate to its major diameter periphery when pressing first pinch roller 21 when first cam 42, then press the end of swing arm 2 simultaneously with a downward strength, making swing arm 2 is lever center rotation and with the lifting that makes progress of the head end of swing arm 2 with pivot 31, at this moment, when if movement arm 3 is subjected to a downward tensile force f, swing arm 2 is promptly upheld because of being subjected to reaching the opposite strength that makes progress downwards with the spring 52 of 3 of movement arms.See also Fig. 5, because second cam 43 is to press with second pinch roller 22 of being located at swing arm 2 tops with its side with crowning 431, therefore, when second cam 43 is subjected to power source 41 driven rotary and presses with its plane and second pinch roller 22, the strength of this second pinch roller 22 because of being pressed, make swing arm 2 still with and frame between spring 24 position of keeping original neutrality.See also Fig. 6, when second cam 43 rotates to its crowning 431 and second pinch roller 22 when pressing, this swing arm 2 promptly is subjected to the strength that presses to opposite side, at this moment, because this swing arm 2,

movement arm

3 and 11 in sleeve are to run through fixing with pivot 31, therefore, promptly be this sideway swivel of middle mind-set, cause swing arm 2, movement arm 3 and sleeve 11 simultaneously to this sideway swivel one angle with 1 pivot that combines of sleeve 11 and frame 12.

See also Fig. 7, the utility model is that rear end track 61 tops of wafer and lead frame bonding wire engineering are provided with two device for testing tensile force on board 6, is tested the aluminum steel 7 that is welded between wafer and lead frame and the bond strength between wafer and lead frame and whether meets demand.See also Fig. 3,5,8, when the lead frame on the track 61 arrives the location, first cam 42 of this two device for testing tensile force is just to rotate to its minor axis periphery to press first pinch roller 21, therefore, swing arm 2 promptly presses movement arm 3 to decline, makes the crochet hook 32 of movement arm 3 drop to the outside of aluminum steel below, at this moment, 43 on second cam presses second pinch roller 22 with its plane, makes swing arm 2 be maintained at the neutral position.See also Fig. 6, Fig. 9, after the crochet hook 32 of movement arm 3 drops to the location, first cam 42 in the rotation is still kept with its minor axis periphery and is pressed first pinch roller 21, at this moment, second cam 43 just rotates to its crowning 431 and presses second pinch roller 22, make swing arm 2 drive movement arm 3 and rotate an angle to the direction of aluminum steel 7, the L shape bottom that makes movement arm 32 to be built in aluminum steel 7 under, see also Fig. 4,10, behind the location under crochet hook 32

places aluminum steel

7,43 on second cam is still kept with its crowning 431 and is pressed second pinch roller 22, make movement arm 3 remain in this anglec of rotation, at this moment, 42 on first cam just rotates to its major diameter periphery and presses first pinch roller 21, and the head end that makes swing arm 2 is upwards lifted length, and drives movement arm 3 upwards liftings simultaneously.See also Figure 11, but when the L shape bottom that movement arm 3 is raised to its crochet hook 32 is subjected to stopping of aluminum steel 7, owing to being subjected to aluminum steel 7, crochet hook 32 stops the downward hook pulling force amount that produces, swing arm 2 then still continues upwards lifting, therefore, the spring 52 that 3 institutes of swing arm 2 and movement arm combine is promptly upheld because of two ends are subjected to rightabout strength pulling, when swing arm 2 more up draws spring 52, aluminum steel 7 promptly must have enough reacting forces and could keep not drawn toward rising to the bait, and reaches the purpose whether bond strength of testing between aluminum steel 7 and wafer and lead frame meets demand in the mode of utilizing this kind generation reacting force.

When finishing the action of test, this power source 41 is reverse rotation, makes swing arm 2 and movement arm 3 return back to original position to drive

first cam

42 and 43 reverse rotations of second cam.

In sum, because wafer commonly used and lead frame are not done the test of bond strength at pad after welding with aluminum steel, therefore, when lead frame is accepted follow-up manufacturing, promptly may produce the phenomenon that aluminum steel comes off or is out of shape, cause making the IC that finishes when test, can be because of certain combination that do not have of pad, and the signal of pin can't correctly be passed in the wafer, cause the stroke defect of wafer circuit or burn wafer, cause the spoilage of IC fraction defective and wafer to improve, thereby increase manufacturing cost, the utility model is then because of doing the test of a bond strength at pad after aluminum steel and wafer and lead frame welding, therefore, pad can not had the defective products of certain combination detected before the IC manufacturing is finished, the IC that manufacturing is finished can keep internal actions correct, and reduce the fraction defective of IC and the spoilage of wafer, truly have its substantial benefit to promote.

Claims

1, a kind of device for testing tensile force, it is the rear end that is arranged at wafer and lead frame bonding wire engineering on the board, it is characterized in that it is made of frame, swing arm, movement arm, interlinked mechanism and tensile machine, wherein:

The front end of frame is provided with opening, and inserts sleeve in opening, and respectively combines with frame with pivot in top, the ends two end of sleeve;

Swing arm is to be placed in the sleeve, and makes the end of swing arm protrude from the other end of sleeve, and is convexly equipped with first pinch roller outside the terminal side direction of swing arm, and the opposite side of swing arm then upwards is convexly equipped with second pinch roller;

Movement arm is to place swing arm below, and runs through this movement arm, swing arm and sleeve simultaneously with pivot, and runs through in the front end of movement arm crochet hook is set;

Interlinked mechanism, it is that power source is set on frame, the eccentric position of first cam and second cam is also run through in the axle center of this power source simultaneously, and first cam is to press the action of first pinch roller, second cam then presses the action of second pinch roller;

Tensile machine is to be incorporated between swing arm and movement arm with spring.

2, device for testing tensile force as claimed in claim 1 is characterized in that a Jiong shape groove is extended in the bottom of described swing arm, runs through with ccontaining movement arm end and with pivot.

3, device for testing tensile force as claimed in claim 1 is characterized in that described first cam is fixed in the top of first pinch roller, to press first pinch roller.

4, device for testing tensile force as claimed in claim 1 is characterized in that described second pinch roller is convexly set in the opposite side top of swing arm, and presses second pinch roller with the side of second cam, and is provided with crowning in the side of second cam.

5, device for testing tensile force as claimed in claim 1 is characterized in that combining a spring respectively between the top of described frame and swing arm end and swing arm.

6, device for testing tensile force as claimed in claim 1, the crochet hook that it is characterized in that the setting of described movement arm front end are the L shape of barb.

7, device for testing tensile force as claimed in claim 1, the spring that it is characterized in that described tensile machine hook respectively is located on the fixed bar on the holder on swing arm top and movement arm top, but and offers an ammunition feed spring and fixed bar is inserted movable through hole on this swing arm.

8, device for testing tensile force as claimed in claim 7 is characterized in that the top of described holder is provided with the adjustment button that can adjust spring tension.