CN104516280B - A kind of controller and wire bonding control device - Google Patents
A kind of controller and wire bonding control device Download PDFInfo
- Publication number
- CN104516280B CN104516280B CN201410208404.XA CN201410208404A CN104516280B CN 104516280 B CN104516280 B CN 104516280B CN 201410208404 A CN201410208404 A CN 201410208404A CN 104516280 B CN104516280 B CN 104516280B
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- stepper motor
- operation information
- motor operation
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/414—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
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- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Wire Bonding (AREA)
Abstract
The present invention provides a kind of controller and wire bonding control device, and the controller includes：The control signal of the CPU, the current stepper motor operation information for receiving the signal processing unit collection, and the stepper motor exported according to the information control described control unit for receiving；The signal processing unit, for gathering the stepper motor operation information, the CPU is transferred to after the stepper motor operation information of collection is processed；Described control unit, for the adjustment according to the CPU, exports the control signal of the stepper motor.Controller and wire bonding control device that the present invention is provided, by setting signal processing unit, first the information that sensor is gathered is pre-processed, mitigate CPU load, keep CPU to the corresponding speed of information, extend the service life of controller.
Description
Technical field
The present invention relates to automation field, more particularly to a kind of controller and wire bonding control device.
Background technology
Existing wire bonder is to use ultra-fine metal wire (common metal linear diameter is between 15 microns 50 microns)
Solder pad of semiconductor device is linked together with lead frame, so as to complete the device of semiconductor devices " bonding " operation.
It is in place of the deficiencies in the prior art：Existing wire bonder in the course of the work, during control device is only relied on
Central Processing Unit completes Signal sampling and processing, and carries out start-up and shut-down control to wire bonder, CPU is located always
In high loaded process state, in the course of time, response speed of the CPU to information will be reduced, or even control can be shortened
The service life of device.
The content of the invention
To overcome drawbacks described above, the present invention to provide a kind of controller and wire bonding control device.
In a first aspect, the embodiment of the present invention provides a kind of controller, for controlling stepper motor to be dispensed to wire bonder
Gold thread, including：
Signal processing unit, for gathering the stepper motor operation information, the stepper motor operation information of collection is entered
CPU is transferred to after row treatment；
The CPU, the current stepper motor operation information for receiving the signal processing unit collection,
And the control signal of the stepper motor exported according to the information control described control unit for receiving.
Preferably, the CPU, specifically for：
Obtain the stepper motor operation information that the signal processing unit sends；
According to the stepper motor operation information for obtaining, whether the stepper motor operation information that judgement is obtained reaches and presets
The change stepper motor trigger the threshold value of frequency, obtain the first judged result；
If the first judged result indicates the stepper motor operation information to reach the change stepper motor triggering frequency
Threshold value, then drive described control unit to the stepper motor send with presently described stepper motor run first touch
The control signal of the different second triggering frequency of hair frequency, controls the stepper motor to be run according to the second triggering frequency；
Wherein, the stepper motor operation information includes：Gold thread lacks line warning message, gold thread wobble information or lead key
At least one of bonding speed of conjunction machine.
Preferably, the CPU, also particularly useful for：
Obtain the first gold thread dispatching speed of the stepper motor；
Whether the first gold thread dispatching speed that judgement gets dispenses speed less than the second gold thread set in advance, obtains the
Two judged results；
If the second judged result indicates the first gold thread dispatching speed of the stepper motor to be less than the second gold medal set in advance
Line dispenses speed, then drive described control unit to send the control signal with halt instruction to the stepper motor, makes described
Stepper motor is stopped.
Preferably, the signal processing unit, including：
Sensor, for gathering the stepper motor operation information；
Analysis module, for being analyzed to the acquired stepper motor operation information, retains and preassigns sampling
The stepper motor operation information of frequency；
Sending module, the stepper motor operation information for the analysis module to be retained is sent to the center treatment
Unit.
Preferably, the analysis module, specifically for：
Judge that whether the stepper motor operation information of collection in sample frequency set in advance, obtains the 3rd judgement
As a result；
If the 3rd judged result indicates the stepper motor operation information in the sample frequency set in advance, then
Retain the stepper motor operation information, otherwise give up the stepper motor operation information for collecting.
Preferably, the controller also includes：
First communication interface, for the information that host computer is inquired about in the CPU；
Second communication interface, for the CPU to the acquired information of host computer transmission.
Preferably, the controller also includes：
Phototube coupling unit, connects for the CPU to be communicated with first communication interface and described second
Mouth carries out electrical isolation.
Second aspect, the embodiment of the present invention provides a kind of wire bonding control device, and described device includes above-mentioned control
Device.
Controller provided in an embodiment of the present invention and wire bonding control device, by the signal processing unit, will adopt
The information of sample is transferred to the CPU after being processed；The CPU, according to the described information for receiving
The control signal of adjustment described control unit output, by setting signal processing unit, is first carried out to the information that sensor is gathered
Pretreatment, mitigates CPU load, keeps CPU to the corresponding speed of information, extends the use of controller
Life-span.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 represents the structure chart of controller embodiment.
Fig. 2 represents the structure chart of the another embodiment of controller.
Fig. 3 represents the fundamental diagram of the another embodiment of controller.
Fig. 4 represents the workflow diagram of operation principle and the flow such as figure of controller.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The structural representation of controller is as shown in figure 1, the controller is used to control stepper motor to match somebody with somebody to wire bonder
Gold thread is sent, including：
Signal processing unit 10, for gathering the stepper motor operation information, the stepper motor operation information that will be gathered
CPU is transferred to after being processed；
The CPU 20, the current stepper motor for receiving the signal processing unit collection runs letter
Breath, and the control signal of the stepper motor of described control unit output is controlled according to the information for receiving.
By setting signal processing unit, first the information that sensor is gathered is pre-processed, mitigate CPU
Load, keeps CPU to the corresponding speed of information, extends the service life of controller.
In existing semiconductor production " bonding " process, metal wire is suspended in the fan-shaped air-flow of compressed air formation
In, the slight change of tension force can cause the violent shake of metal wire, influence " bonding " quality, and the violent shake of metal wire can also be led
Sensor is caused repeatedly to be triggered in a short time, so that CPU controls step according to the dispatching status signal for receiving
Stepper motor needs to make precision maneuver, and makes stepper motor frequently start and stop, but it is such operation technically exist it is larger
Difficulty.
In the present embodiment, the CPU 10, specifically for：
Obtain the stepper motor operation information that the signal processing unit sends；
According to the stepper motor operation information for obtaining, whether the stepper motor operation information that judgement is obtained reaches and presets
The change stepper motor trigger the threshold value of frequency, obtain the first judged result；
If the first judged result indicates the stepper motor operation information to reach the change stepper motor triggering frequency
Threshold value, then drive described control unit to the stepper motor send with presently described stepper motor run first touch
The control signal of the different second triggering frequency of hair frequency, controls the stepper motor to be run according to the second triggering frequency；
Wherein, the stepper motor operation information includes：Gold thread lacks line warning message, gold thread wobble information or lead key
At least one of bonding speed of conjunction machine.
By above description, by obtaining the stepper motor operation information that the signal processing unit sends, motor is turned
Dynamic speed carries out reasonable distribution, and more positive motor rotates step pitch in real time, motor not frequent start-stop when making sensor frequently trigger,
Even if there is the situation that metal wire is acutely shaken, the frequent start-stop of stepper motor is not resulted in yet, stepper motor is in one kind
The state that " fluctuation of speed small range " is continuously rotated.
In existing semiconductor production " bonding " process, not all kinds device can be carried out broken string inspection
Survey, and disconnection monitoring is carried out to this device, significantly " waste material " can be caused in process of production, so as to cause cost
Rising problem.
In the present embodiment, the CPU, also particularly useful for：
Obtain the first gold thread dispatching speed of the stepper motor；
Whether the first gold thread dispatching speed that judgement gets dispenses speed less than the second gold thread set in advance, obtains the
Two judged results；
If the second judged result indicates the first gold thread dispatching speed of the stepper motor to be less than the second gold medal set in advance
Line dispenses speed, then drive described control unit to send the control signal with halt instruction to the stepper motor, makes described
Stepper motor is stopped.
It is whether faulty in the bonding technology of detection semiconductor technology by detecting the dispatching speed of metal wire, without making
With the mode of burn out detection, it is to avoid produce " waste material " during generation, can effectively control production cost.
Further, the signal processing unit, including：
Sensor, for gathering the stepper motor operation information；
Analysis module, for being analyzed to the acquired stepper motor operation information, retains and preassigns sampling
The stepper motor operation information of frequency；
Sending module, the stepper motor operation information for the analysis module to be retained is sent to the center treatment
Unit.
Existing wire bonder can produce extremely strong electromagnetic interference in the course of the work, and cause to be supervised by sensor
There is the interference of larger frequency domain in the metal wire dispatching status signal for measuring, increased monitoring metal wire dispatching status signal
Difficulty.
Specifically, the analysis module, specifically for：
Judge that whether the stepper motor operation information of collection in sample frequency set in advance, obtains the 3rd judgement
As a result；
If the 3rd judged result indicates the stepper motor operation information in the sample frequency set in advance, then
Retain the stepper motor operation information, otherwise give up the stepper motor operation information for collecting.
Specifically, the analysis module includes interference meter and FFT spectrum analyzer, is adopted by the interference meter
Collection signal, the main frequency domain residing for interference signal is analyzed with the FFT spectrum analyzer, then evades interference signal
Influence.
By aforesaid operations, sensor signal is sampled with specific sample frequency, differentiated by probability distribution and passed
The validity of sensor signal, the sensor false touch that identification electromagnetic disturbance field causes is signaled, and can avoid electromagnetic disturbance signal frequently
Band dispenses the interference of status signal to metal wire, reduces the difficulty that monitoring metal wire dispenses status signal.
Further, the controller also includes：
First communication interface, for the information that the host computer is inquired about in the CPU；
Second communication interface, for the CPU to the acquired information of host computer transmission.
Further, first communication interface can be serial line interface；Second communication interface is parallel interface.
Further, the controller also includes：
Phototube coupling unit, connects for the CPU to be communicated with first communication interface and described second
Mouth carries out electrical isolation；
The CPU by after phototube coupling unit, then respectively by first communication interface and described
Two communication interfaces carry out information exchange with the host computer.
By aforesaid operations, the shadow of the electromagnetic field to the wire bonder in the course of work of outside can be further reduced
Ring.
Controller is further described by following examples.
The structure chart of the another embodiment of controller is as shown in Figure 2：By power module, CPU, Phototube Coupling list
Unit, signal transacting and converting unit, RS422 serial communication interfaces, parallel signal interface (being exactly the High Speed I/O channel in Fig. 2),
Fibre Optical Sensor introduces interface, stepper motor command channel composition；The power subsystem is connected with other units and passage, there is provided
+ 5VDC and+24VDC power supplys, isolate to system power supply power supply, RS422 serial communication channel power sources；The center treatment is single
Unit is connected by phototube coupling unit with RS422 serial communication passages so that host computer can in real time carry out CPU
Parameter setting and status inquiry；The CPU is connected by phototube coupling unit with parallel signal interface, actively
Current metal wire dispatching state is reported and submitted to host computer；The CPU is passed with converting unit by signal isolation with two-way
Sensor passage is connected, the current metal wire surplus state of real-time detection；The CPU is connected with stepper motor passage, is
Controllor for step-by-step motor provides power supply and pulse, direction signal, controls the stepper motor motion of the automatic dispenser of metal wire.
Because full-automatic lead bonding machine includes electronic striking, high acceleration linear electric motors, superelevation acceleration voice coil motor etc.
Modular unit, electromagnetic environment is complex in the course of work, there is frequency spectrum and covers wider electromagnetic interference signal, thus to super
The reliability of lametta automatic delivery signal acquisition proposes high requirement, and the controller in the present embodiment passes through full range
Spectrum electromagnetic disturbance signal analysis, draws electromagnetic disturbance signal frequency and energy-distributing feature, and signal processing function unit is avoiding
The mode of electromagnetic disturbance signal band, is sampled, by probability distribution with specific sample frequency to two-way sensor signal
The validity of discriminating sensor signal, the sensor false touch that identification electromagnetic disturbance field causes is signaled, signal processing function unit
Signature analysis is carried out to sensor signal, the dispatching status information of current metal wire is extracted.
Metal wire is suspended in the air-flow of compressed air formation, and the slight change of tension force can cause acutely trembling for metal wire
It is dynamic, " bonding " quality is influenceed, sensor also can be triggered repeatedly in a short time in addition, and stepper motor needs to make accurate dynamic
Make, and rotate it is smooth to realize that accurate dispatching has very highly difficult, the pulse optimization functional unit is with by the pulse of optimization
The acceleration and deceleration of FREQUENCY CONTROL stepper motor, reach motor smooth pivotal purpose.In the present embodiment, lured by analyzing tension variation
Cause --- " big step pitch discrete type means of distribution ", devise it is a kind of suitable for ultra-thin metal wire delivery system " motor cycle adds
Slow down " dispatching mechanism, " big step pitch discrete type means of distribution " use " ultra micro is away from continous way means of distribution " is substituted.Work in big step
During away from discrete type means of distribution, motor can just be performed next time after rotating a wide-angle and completing the transmission of this metal wire
Metal wire is transmitted, and causes motor frequent start-stop, and metal wire dispatching state is also discrete discrete.And ultra micro is dispensed away from continous way
Mode carries out reasonable distribution, and more positive electricity in real time to motor rotation speed by analyzing the trigger event of Auto Feed sensors
Machine rotates step pitch, motor not frequent start-stop when making sensor frequently trigger, but is in a kind of " fluctuation of speed small range " company
The continuous state for rotating, metal wire is by continuous dispatching until metal wire surplus properly stops afterwards.Functional unit is to current metal wire
Dispatching status information is analyzed and collected, and examination dispenses state, continuously frequently dispenses state and normally dispenses state for a long time,
Realize that metal wire is not dispensed excessively under dispatching state for a long time, and in continuous frequently dispatching state stepper motor infrequently
Start and stop.
In semiconductor production " bonding " process, not all kinds device can be carried out " burn out detection ", and
For such devices, can cause in process of production significantly " waste material ".A kind of " key of the controller design of the present embodiment
Close " monitoring function, by information exchange, metal wire delivery system not only grasps the working condition of delivery system, goes back GPRS whole
The course of work state of machine, according to the theoretical calculation of ultra-thin metal wire operating speed, coordinating automatic dispatching in " bonding " technique
The actual ultra-thin metal wire operating speed of system, monitors the error failure of " bonding " process.Specifically, in the present embodiment, it is
A kind of function that metal wire service condition is monitored in bonding process of controller design.Gold is calculated according to bonding technology requirement
The theoretical dispatching speed of category line, then obtains the actual dispatching speed of metal wire by the trigger event of analyte sensors, works as key
Metal wire fails to be welded on when on chip pin during conjunction, and the actually used amount of metal wire is reduced, the actual dispatching of metal wire
Speed can be determined that bonding process has failure, and stop motor wait bonder main control according to this less than theoretical dispatching speed
Device handling failure.
As shown in Figure 3-4, the CPU in controller completes controller institute to the operation principle and flow of controller
The functions such as some logic controls, signal transacting, pulse optimization and communications；CPU by phototube coupling unit with
RS422 serial communications passage is connected, host computer can be operated mode in real time, length is isoparametric sets for metal wire dispatching
Put the inquiry that state is dispensed with metal wire；CPU is connected by phototube coupling unit with High Speed I/O channel, Ke Yizhu
Trend host computer reports and submits current metal wire dispatching state；CPU can be with certain to the input signal of sensor
Sampling interval is sampled, and determines sampled result by probability distribution with multiple repairing weld result；Central processing unit is to current metal
Line dispatching status information is analyzed and collected, and examination dispenses state, continuously frequently dispenses state and normally dispenses shape for a long time
State；Central processing unit is so that by the acceleration and deceleration of the pulse frequency of optimization control stepper motor, motor rotates smooth.
System power-up after, CPU is initialized to controller, after the completion of initialization can and Framework computing
Machine sets up communication.Controller initialization after the completion of, controller according to acquiescence technological parameter (such as stepper motor rotate step-length,
Automatic/hand mode etc.) work.In whole work process, host computer can be by RS422 serial communication passages to work
Skill parameter is configured.The method of operation of controller is divided into automatic working method and manual work mode, and automatic working method is
Working method during " bonder " automatic running, and the operation in artificial participation process to delivery system is manual work mode.
CPU is sampled with the sensor input signal after conversion to isolation with certain sampling interval, is tied
Actual electromagnetic interference environment is closed, whether the probability distribution situation judging input signal according to multiple repairing weld is effective, filters " bonding
The electromagnetic interference of other electronic installations on machine ".Central processing unit is judged the input signal of sensor, it is determined that with which kind of side
Formula Driving Stepping Motor carries out metal wire dispatching and reports and submits metal wire to dispense state to host computer.Under automated manner,
The signal of metal wire dispenser " scarce line " alarm sensor can just be sampled.After controller sends alarm signal, only pass through
Alarm condition and normal work can be just exited after serial port command is removed or controller resets.
A kind of wire bonding control device is also proposed in the embodiment of the present application, the wire bonding control device includes above-mentioned
Controller.
The function and handling process of the wire bonding control device provided in the present embodiment, may refer to controller reality above
The flow of example is applied, here is omitted.
The controller and wire bonding control device provided by the description of above-described embodiment, the application, by the letter
Number processing unit, is transferred to the CPU after the information of sampling is processed；The CPU, according to
The control signal of the described information adjustment described control unit output of reception, by setting signal processing unit, first to sensor
The information of collection is pre-processed, and mitigates CPU load, keeps CPU to the corresponding speed of information, is prolonged
The service life of controller long.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (7)
1. a kind of controller, for controlling stepper motor to dispense gold thread to wire bonder, it is characterised in that including：
Signal processing unit, for gathering the stepper motor operation information, at the stepper motor operation information of collection
CPU is transferred to after reason；
The CPU, the current stepper motor operation information for receiving the signal processing unit collection, and root
The control signal of the stepper motor exported according to the information control described control unit for receiving；
The CPU, specifically for：
Obtain the stepper motor operation information that the signal processing unit sends；
According to the stepper motor operation information for obtaining, whether the stepper motor operation information that judgement is obtained reaches set in advance changing
Become the threshold value that the stepper motor triggers frequency, obtain the first judged result；
If the first judged result indicates the stepper motor operation information to reach the threshold that the change stepper motor triggers frequency
Value, then drive described control unit to be sent with the first triggering frequency run with presently described stepper motor to the stepper motor
The control signal of the different second triggering frequency of rate, controls the stepper motor to be run according to the second triggering frequency；
Wherein, the stepper motor operation information includes：Gold thread lacks line warning message, gold thread wobble information or wire bonder
At least one of bonding speed.
2. controller according to claim 1, it is characterised in that the CPU, also particularly useful for：
Obtain the first gold thread dispatching speed of the stepper motor；
Whether the first gold thread dispatching speed that judgement gets dispenses speed less than the second gold thread set in advance, obtains second and sentences
Disconnected result；
If the second judged result indicates the first gold thread dispatching speed of the stepper motor to match somebody with somebody less than the second gold thread set in advance
Speed is sent, then drives described control unit to send the control signal with halt instruction to the stepper motor, make the stepping
Motor is stopped.
3. controller according to claim 1, it is characterised in that the signal processing unit, including：
Sensor, for gathering the stepper motor operation information；
Analysis module, for being analyzed to the acquired stepper motor operation information, retains and preassigns sample frequency
The stepper motor operation information；
Sending module, it is single that the stepper motor operation information for the analysis module to be retained is sent to the center treatment
Unit.
4. controller according to claim 3, it is characterised in that the analysis module, specifically for：
Whether the stepper motor operation information of collection is judged in sample frequency set in advance, obtains the 3rd judgement knot
Really；
If the 3rd judged result indicates the stepper motor operation information in the sample frequency set in advance, then retain
The stepper motor operation information, otherwise gives up the stepper motor operation information for collecting.
5. controller according to claim 1, it is characterised in that the controller also includes：
First communication interface, for the information that host computer is inquired about in the CPU；
Second communication interface, for the CPU to the acquired information of host computer transmission.
6. controller according to claim 5, it is characterised in that the controller also includes：
Phototube coupling unit, for the CPU to be entered with first communication interface and second communication interface
Row electrical isolation.
7. a kind of wire bonding control device, it is characterised in that described device includes the control described in claim any one of 1-6
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410208404.XA CN104516280B (en) | 2013-09-30 | 2014-05-16 | A kind of controller and wire bonding control device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104594837 | 2013-09-30 | ||
| CN201310459483 | 2013-09-30 | ||
| CN201410208404.XA CN104516280B (en) | 2013-09-30 | 2014-05-16 | A kind of controller and wire bonding control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104516280A CN104516280A (en) | 2015-04-15 |
| CN104516280B true CN104516280B (en) | 2017-05-31 |
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| CN201410208404.XA Expired - Fee Related CN104516280B (en) | 2013-09-30 | 2014-05-16 | A kind of controller and wire bonding control device |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3022209B2 (en) * | 1994-11-07 | 2000-03-15 | 松下電器産業株式会社 | Wire bonding method |
| CN101393875B (en) * | 2008-10-09 | 2010-07-14 | 中国电子科技集团公司第四十五研究所 | Force compensation method for keying head of full-automatic wire keying machine |
| CN103177978B (en) * | 2011-12-23 | 2015-11-18 | 大族激光科技产业集团股份有限公司 | High frequency rotational mechanism and wire bonder |
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2014
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