CN102243282A - Direct current thread break detection device of fully automatic gold thread bonder - Google Patents
Direct current thread break detection device of fully automatic gold thread bonder Download PDFInfo
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- CN102243282A CN102243282A CN2010101763914A CN201010176391A CN102243282A CN 102243282 A CN102243282 A CN 102243282A CN 2010101763914 A CN2010101763914 A CN 2010101763914A CN 201010176391 A CN201010176391 A CN 201010176391A CN 102243282 A CN102243282 A CN 102243282A
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- direct current
- detection
- automatic gold
- bonding machine
- thread
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Abstract
The invention discloses a direct current thread break detection device of a fully automatic gold thread bonder. The device is characterized in that: a direct current voltage is supplied by a direct current voltage source and added between a thread clamp and a bracket clamp; a small current control circuit controls currents in a direct current loop and judges whether a thread-break error occurs by judging whether the direct current loop is switched on or off; and a detection result is sent to an upper computer through a bus interface. The device specifically comprises the direct current voltage source, a micro controller, an analog signal processing circuit, a filter network, the small current control circuit and an analog signal switching circuit, wherein a ground end of the direct current voltage source is isolated from a chassis ground; the micro controller executes a thread break detection algorithm and communicates with the upper computer through the bus interface; the analog signal processing circuit acquires analog signals of detection loops in a detection process; the filter network eliminates the noise interference in a detection environment; the small current control circuit keeps the currents in the detection loops in corresponding safe ranges according to different bonding objects; and the analog signal switching circuit selects different detection loops according to the different bonding objects.
Description
Technical field
The present invention is a kind of full-automatic gold thread bonding machine direct current broken thread detector, provides DC voltage to be added between wire clamp and the support folder by direct voltage source, and the ground end and the casing ground of this direct voltage source are isolated, and guarantee safety current by the Weak current control circuit.By judge detecting leading on-off and can judging whether to take place the broken string mistake of loop.The present invention relates to a kind of full-automatic gold thread bonding machine direct current broken thread detector, especially be applicable to low cost, the broken thread detector of high measurement accuracy is the replacement scheme that exchanges pick-up unit.
Background technology
Below to use full-automatic gold thread bonding machine to produce to pass judgement the process of LED the principle of work of line detector.
Generally speaking, LED is divided into semi-conductor chip and support two parts.The LED semi-conductor chip can equivalence be a diode, the Lamp cup conducting of one end and support, the other end need full-automatic gold thread bonding machine with gold thread with itself and support short circuit.Be illustrated in figure 1 as full-automatic gold thread bonding machine first point (end of semi-conductor chip) of LED is carried out bonding, broken thread detector links to each other by wire clamp the positive pole of DC voltage with gold thread, and negative pole links to each other with the Lamp cup of LED by the support folder.If first bonding is normal, diode is in the positively biased conducting state, and the check point magnitude of voltage is approximately the dc voltage value that applies; Otherwise diode is in cut-off state, and then the check point magnitude of voltage is approximately cathode voltage.Be illustrated in figure 2 as first bonding success back second point (support of LED) is carried out bonding, broken thread detector links to each other by wire clamp the negative pole of DC voltage with gold thread, and anodal the folder by support links to each other with the support of LED.If second bonding is normal, gold thread and support conducting, the check point magnitude of voltage is the cathode voltage value that applies; Otherwise gold thread links to each other with support by equivalent diode, and equivalent diode is in anti-cut-off state partially, and the check point magnitude of voltage is approximately negative battery voltage.
In sum, burn out detection needs two the detection loops that can switch to detect and bonding situation respectively at first at second.In addition, in order to protect the LED semi-conductor chip, detecting electric current should be in safe range, and the Weak current control in the broken thread detector of the present invention guarantees to detect electric current in safe range,
What the broken thread detector that adopts on the full-automatic gold thread bonding machine of at present external import all used is to exchange detection mode, this mode circuit structure complexity, the cost height, and AC signal is subjected to the electromagnetic environment noise easily, thereby misrepresents deliberately (bonding normally but reports an error) and fail to report (the bonding failure does not but report an error).Problems such as on the other hand, existing broken thread detector also exists integrated level not high, and communication interface is backward.
The objective of the invention is to provide for the burn out detection function in the full-automatic gold thread bonding machine implementation of low cost, high measurement accuracy and high integration, advanced communication interface has also been widened the scope of application of the present invention
Summary of the invention
The present invention adopts direct current Weak current detection mode, compares with exchanging detecting pattern, and it is strong to have an antijamming capability, and advantage such as signal processing circuit is simple improves accuracy of detection to a great extent and reduces cost.For the full-automatic gold thread bonding of low side machine provides practical burn out detection scheme.
In order to reduce the broken thread detector volume, improve stability, adopt microcontroller completion logic function, and add the broken string assessment algorithm, further improve accuracy of detection.
Full-automatic gold thread bonding machine direct current broken thread detector of the present invention adopts advanced serial bus interface, and the communication speed height of this bus is applied widely.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing and example
Fig. 1 is the full-automatic gold thread bonding machine first solder joint burn out detection instance graph of the present invention
Fig. 2 is the full-automatic gold thread bonding machine second solder joint burn out detection instance graph of the present invention
Fig. 3 is the block scheme of full-automatic gold thread bonding machine direct current broken thread detector of the present invention
Fig. 4 is the instantiation figure of full-automatic gold thread bonding machine direct current broken thread detector of the present invention
Embodiment
The instantiation of full-automatic gold thread bonding machine direct current broken thread detector of the present invention is described below in conjunction with accompanying drawing 3 and 4.This example is made of the host computer in the full-automatic gold thread bonding machine, wire clamp, support folder, electronic striking device and broken thread detector of the present invention.
After full-automatic gold thread bonding machine powered on end, host computer was by bus interface initialization broken thread detector.In the burn out detection process, host computer detects the loop by bus selection, and sends sense command.Microcontroller in the broken thread detector is received the sense command that host computer sends, and wire clamp is linked to each other with broken thread detector, and select the relevant detection loop.Analog signal processing circuit will be examined simulating signal and change into digital signal and be sent to microcontroller, after microcontroller is finished the burn out detection algorithm, notify host computer with testing result by bus, and the electronic striking device of wire clamp with full-automatic gold thread bonding machine linked to each other.So far, burn out detection end cycle.
Claims (4)
1. full-automatic gold thread bonding machine direct current broken thread detector, it is characterized in that: provide DC voltage to be added between wire clamp and the support folder by direct voltage source, the ground end and the casing ground of this direct voltage source are isolated, and guarantee safety current by the Weak current control circuit.By judge detecting leading on-off and can judging whether to take place the broken string mistake of loop.Specifically comprise: constitute by the host computer in the full-automatic gold thread bonding machine, wire clamp, support folder, electronic striking device and broken thread detector of the present invention.After full-automatic gold thread bonding machine powered on and finishes, host computer was by bus interface initialization broken thread detector.In the burn out detection process, host computer detects the loop by bus selection, and sends sense command.Microcontroller in the broken thread detector is received the sense command that host computer sends, and wire clamp is linked to each other with broken thread detector, and select the relevant detection loop.Analog signal processing circuit will be examined simulating signal and change into digital signal and be sent to microcontroller, after microcontroller is finished the burn out detection algorithm, notify host computer with testing result by bus, and the electronic striking device of wire clamp with full-automatic gold thread bonding machine linked to each other, thereby realizing judging detects leading on-off and can judging whether the wrong a kind of full-automatic gold thread bonding machine direct current broken thread detector that breaks of loop.
2. the described full-automatic gold thread bonding machine direct current broken thread detector of claim 1, it is characterized in that: adopt direct current Weak current detection mode, with exchange detecting pattern and compare, it is strong to have antijamming capability, advantages such as signal processing circuit is simple improve accuracy of detection to a great extent and reduce cost.
3. the described full-automatic gold thread bonding machine direct current broken thread detector of claim 1 is characterized in that: adopt microcontroller completion logic function, and add the broken string assessment algorithm, further improve accuracy of detection.
4. the described full-automatic gold thread bonding machine direct current broken thread detector of claim 1 is characterized in that: adopt advanced serial bus interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101763914A CN102243282A (en) | 2010-05-13 | 2010-05-13 | Direct current thread break detection device of fully automatic gold thread bonder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101763914A CN102243282A (en) | 2010-05-13 | 2010-05-13 | Direct current thread break detection device of fully automatic gold thread bonder |
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| Publication Number | Publication Date |
|---|---|
| CN102243282A true CN102243282A (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101763914A Pending CN102243282A (en) | 2010-05-13 | 2010-05-13 | Direct current thread break detection device of fully automatic gold thread bonder |
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| CN (1) | CN102243282A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646195A (en) * | 2016-12-22 | 2017-05-10 | 中国电子产品可靠性与环境试验研究所 | Method, device and platform for detecting instantaneous touch of bonding wire based on electrical method |
| CN111630401A (en) * | 2018-01-26 | 2020-09-04 | 三菱电机株式会社 | Semiconductor device and power conversion device |
| CN114918655A (en) * | 2021-06-11 | 2022-08-19 | 阿特拉斯柯普科工业技术(德国)有限公司 | Method and device for monitoring and/or regulating a hot-melt tapping process |
-
2010
- 2010-05-13 CN CN2010101763914A patent/CN102243282A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646195A (en) * | 2016-12-22 | 2017-05-10 | 中国电子产品可靠性与环境试验研究所 | Method, device and platform for detecting instantaneous touch of bonding wire based on electrical method |
| CN106646195B (en) * | 2016-12-22 | 2019-11-08 | 中国电子产品可靠性与环境试验研究所 | Detection method, device and the platform that bonding wire based on electric method is instantaneously touched |
| CN111630401A (en) * | 2018-01-26 | 2020-09-04 | 三菱电机株式会社 | Semiconductor device and power conversion device |
| CN111630401B (en) * | 2018-01-26 | 2022-09-16 | 三菱电机株式会社 | Semiconductor device and power conversion device |
| CN114918655A (en) * | 2021-06-11 | 2022-08-19 | 阿特拉斯柯普科工业技术(德国)有限公司 | Method and device for monitoring and/or regulating a hot-melt tapping process |
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