CN106824832A - A kind of detection means and its application method - Google Patents

Abstract

The present invention relates to a detection device and its use method, which are used for electrical detection of circuit boards. The circuit board includes a connector, a first branch and a second branch. The first branch includes a first gold finger group, a first The circuit and the first component, the first gold finger group is electrically connected to the connector through the first circuit and the first component; the second branch circuit includes the second gold finger group, the second circuit and the second component, and the second gold finger group passes through The second line and the second element are electrically connected to the connector, the second branch and the first branch are connected in parallel; the detection device includes a first conductive glue and a second conductive glue, the first conductive glue corresponds to the first branch, and to detect the electrical properties of the first branch; the second conductive glue corresponds to the second branch, and is used to detect the electrical properties of the second branch, and the conduction control of the first conductive glue and the second conductive glue are independent of each other; when only When one of the first branch and the second branch needs to be electrically tested, only the corresponding first conductive glue or the second conductive glue can be turned on.

Description

A detection device and method of use thereof

technical field

The present invention relates to a detection device and its use method, in particular to a high measurable rate detection device and its use method.

Background technique

Generally, after the printed circuit boards, semiconductor packaging components or wafers with multiple detection points (such as electronic component contacts) are manufactured, they need to be tested by a special jig to confirm whether they are good products or whether there is an open circuit phenomenon. .

Fig. 1 is the schematic diagram of circuit board electrical property detection of prior art, please refer to Fig. 1, there are a plurality of probes 111 on the detection jig 110, are used for contacting the measuring point 123 on the circuit board 120 to realize electrical property detection, measure The point 123 is electrically connected to the golden finger 121 and the connector 122 , but, as shown in FIG. 1 , the measuring point 123 will be in an exposed state, which may cause static electricity problems.

FIG. 2 is a schematic diagram of an improved electrical inspection of a circuit board in the prior art. Please refer to Fig. 2, in order to improve the electrostatic problem caused by the measuring point 123 in Fig. 1, the circuit board 220 paints and hides the measuring point 223, and according to the structure change of the circuit board 220, the electrical detection method is also changed Needle detection becomes conductive adhesive detection. There is a whole strip of conductive glue 211 on the detection jig 210, which is used to press and contact the golden finger 221 to realize electrical detection, but this detection method is not very high for the detection rate of the parallel branch, for example, different golden fingers 221 The branches connected to the connector 222 are connected in parallel. In this way, if there is an electrical problem in one of them, the detection fixture 210 cannot detect it. Therefore, although the detection method in FIG. high question.

Contents of the invention

In order to improve the above-mentioned problem of low testability, the present invention provides a detection device.

The above-mentioned detection device is used for electrical detection of circuit boards,

The board includes:

Connector;

A first branch, the first branch including a first gold finger group, a first circuit and a first component, the first gold finger group is electrically connected to the connector through the first circuit and the first component; and

The second branch, the second branch includes a second gold finger group, a second line and a second element, the second gold finger group is electrically connected to the connector through the second line and the second element, the second The branch and the first branch are connected in parallel with each other;

The detection device includes:

a first conductive glue, corresponding to the first branch, for detecting the electrical properties of the first branch and the first element; and

The second conductive glue, corresponding to the second branch, is used to detect the electrical properties of the second branch and the second element, and the conduction control of the first conductive glue and the second conductive glue are independent of each other;

Wherein, one of the first branch and the second branch is electrically detected by conducting one of the first conductive glue and the second conductive glue.

As an optional technical solution, the detection device further includes a conduction control unit, the conduction control unit includes a first switch and a second switch connected in parallel, the first switch is electrically connected to the first conductive glue to control the first The second switch is electrically connected to the second conductive glue to control whether the second conductive glue is conductive or not.

As an optional technical solution, multiple gold fingers in the first gold finger group receive the same signal.

As an optional technical solution, the first conductive adhesive has a conductive cloth and a colloid, and the conductive cloth covers the colloid.

As an optional technical solution, the detection device further includes a fixing unit, and the first conductive glue and the second conductive glue are fixed to the fixing unit.

As an optional technical solution, the fixing unit includes a first fixing part and a second fixing part, the first conductive glue is fixed on the first fixing part, the second conductive glue is fixed on the second fixing part, the first The fixing part and the second fixing part can be stretched and pressed independently.

The present invention also provides a method for using the detection device, which is used for electrical detection of circuit boards,

The board includes:

Connector;

A first branch, the first branch including a first gold finger group, a first circuit and a first component, the first gold finger group is electrically connected to the connector through the first circuit and the first component; and

The second branch, the second branch includes a second gold finger group, a second line and a second element, the second gold finger group is electrically connected to the connector through the second line and the second element, the second The branch and the first branch are connected in parallel with each other;

The detection device includes:

a first conductive glue, corresponding to the first branch, for detecting the electrical properties of the first branch and the first element; and

The second conductive glue, corresponding to the second branch, is used to detect the electrical properties of the second branch and the second element, and the conduction control of the first conductive glue and the second conductive glue are independent of each other;

The method of use includes:

Step S1: Detect whether the electrical property of the connector is good, if yes, go to step S2, if not, go to step S6;

Step S2: press and conduct on the first conductive adhesive and the second conductive adhesive at the same time, check whether the electrical properties are good, if yes, go to step S3, if not, go to step S6;

Step S3: only turn on the first conductive glue, check whether the electrical properties are good, if yes, go to step S4, if not, go to step S6;

Step S4: Turn on only the second conductive adhesive to check whether the electrical property is good, if yes, go to step S5, if not, go to step S6;

Step S5: record that the circuit board is a good product;

Step S6: Record that the circuit board is defective.

As an optional technical solution, the detection device further includes a conduction control unit, the conduction control unit includes a first switch and a second switch connected in parallel, and in the step S2 and the step S3, the first switch controls the first switch Whether a conductive adhesive is conducted or not, in the step S2 and the step S4, the second switch controls whether the second conductive adhesive is conducted or not.

As an optional technical solution, the detection device further includes a fixing unit, the fixing unit includes a first fixing part and a second fixing part, the first conductive glue is fixed on the first fixing part, and the second conductive glue is fixed on the The second fixing part, the first fixing part and the second fixing part can be pressed together independently, and in the step S2 and the step S3, the first fixing part expands and contracts to control whether the first conductive adhesive is conductive or not, In the step S2 and the step S4, the second fixing portion expands and contracts to control whether the second conductive adhesive is conductive or not.

As an optional technical solution, the first conductive adhesive has a conductive cloth and a colloid, and the conductive cloth covers the colloid.

Compared with the prior art, the present invention can perform separate electrical detection of the first branch and the second branch connected in parallel through the independently controlled first conductive glue and the second conductive glue, which can improve the existence of parallel branches in the circuit board. Untestable conditions on the road, thereby improving the testability of the circuit board.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of circuit board electrical testing in the prior art;

FIG. 2 is a schematic diagram of an improved circuit board electrical detection of the prior art;

Fig. 3 is the schematic diagram of circuit board electrical property detection of the present invention;

4 is a schematic diagram of an embodiment of the detection device of the present invention;

5 is a schematic diagram of another embodiment of the detection device of the present invention;

FIG. 6 is a flowchart of a method for using the detection device in FIG. 3 .

detailed description

FIG. 3 is a schematic diagram of circuit board electrical testing of the present invention. Please refer to FIG. 3 , the detection device 310 is used for electrical detection of the circuit board 320 . The circuit board 320 includes a connector 321, a first branch 322 and a second branch 323, the first branch 322 includes a first gold finger group 3221, a first line 3222 and a first component (not shown), the first line 3222 and a first element (not shown) electrically connect the first gold finger group 3221 and the connector 321, the second branch 323 includes a second gold finger group 3231 and a second line 3232 and a second element (not shown), The second circuit 3232 and the second element (not shown) are electrically connected to the second gold finger group 3231 and the connector 321, wherein the first branch 322 and the second branch 323 are connected in parallel with each other. In this embodiment, the first element and the second component is, for example, an electronic component such as a chip or a capacitor. The plurality of gold fingers in the first gold finger group 3221 receive the same signal, for example, the first gold finger group 3221 receives a power supply or a data signal, that is, after the circuit board 320 is assembled, the power supply Or data signals are concentrated in the first gold finger group 3221 and then distributed to all levels of drivers. Of course, in other embodiments, multiple gold fingers of the first gold finger group 3221 can also receive different signals, for example, the first gold finger group 3221 provides various functional signals for the first area of the display panel, while the second gold finger group 3231 To provide various functional signals for the second area of the display panel, the first gold finger group 3221 and the second gold finger group 3231 correspond to input terminals with the same function of different drivers, and may also correspond to input terminals with different functions of the same driver. Here, How to group cheats is not limited.

The detection device 310 includes a first conductive glue 311 and a second conductive glue 312, the first conductive glue 311 corresponds to the first branch 322, and is used to detect the electrical properties of the first branch 322, and the second conductive glue 312 corresponds to the second branch 322. The branch circuit 323 is used to detect the electric property of the second branch circuit 323 . Because the first conductive glue 311 corresponds to the first branch 322 (the first golden finger group 3221) or the second conductive glue 312 corresponds to the second branch 323 (the second golden finger group 3231), so the first conductive glue 311 or The contact area between the second conductive adhesive 312 and the circuit board 320 can be slightly larger than the area of the first golden finger group 3221 or the second golden finger group 3231, so that the manufacturing process of the first conductive adhesive 311 or the second conductive adhesive 312 is relatively simple , and it does not need to be made into the size of the probe, and it is easier to detect the alignment. In this embodiment, the first conductive adhesive 311 has conductive cloth and colloid, the conductive cloth is coated with colloid, and the conductive cloth is used for the conductive function of electrical testing. In this embodiment, the conductive cloth is fiber cloth, and the colloid is used for the detection device The circuit board 320 will not be damaged when the 310 is pressed together. Of course, in other embodiments, the first conductive adhesive 311 can also be conductive foam or other conductors, and it only needs to meet the conductive requirements of the first conductive adhesive 311 .

The conduction control of the first conductive glue 311 and the second conductive glue 312 are independent of each other, so that the first branch and the second conductive glue can be controlled by conducting one of the first conductive glue and the second conductive glue. One of the branches is electrically tested, that is, when only one of the first branch 322 and the second branch 323 needs to be electrically tested, only the corresponding first conductive glue can be turned on 311 or the second conductive glue 312. That is, some branches of the circuit board 320 are in a parallel state, for example, the first branch 322 and the second branch 323, when performing electrical testing of the circuit board 320, the first branch 322 needs to be detected separately to detect the first Whether the branch circuit 322 has a short circuit, an open circuit, poor electrical properties of electronic components, or other electrical defects, the electrical detection of the first branch circuit 322 can be carried out by only conducting the corresponding first conductive glue 311. At this time, the second branch 323 is in a non-conductive state, which will not affect the detection of the first branch 322 . That is to say, the detection device 310 of the present invention can perform electrical detection of the parallel branch circuit, and the testability rate is greatly improved.

Fig. 4 is a schematic diagram of an embodiment of the detection device of the present invention. Please refer to FIG. 3 and FIG. 4 together. The detection device 310 also includes a conduction control unit 313 and a fixing unit 314. The conduction control unit 313 includes a first switch 3131 and a second switch 3132 connected in parallel. The first switch 3131 is electrically connected to The first conductive glue 311 is used to control whether the first conductive glue 311 is turned on or not, and the second switch 3132 is electrically connected to the second conductive glue 312 to control whether the second conductive glue 312 is turned on or not. The first conductive glue 311 and the second conductive glue 312 are fixed on the fixing unit 314 . In this embodiment, the conduction between the first conductive glue 311 and the second conductive glue 312 is determined by means of the first switch 3131 and the second switch 3132. For example, as shown in FIG. 4, the second switch 3132 is closed, When the second conductive glue 312 is in the conduction state, the electrical detection of the second branch circuit 323 can be performed. In other embodiments, the conduction of the first conductive glue 311 or the second conductive glue 312 can also be independently controlled in other ways, such as another embodiment of the detection device of the present invention shown in Figure 5, the detection device 410 includes The first conductive glue 411, the second conductive glue 412 and the fixing unit 413, the fixing unit 413 includes the first fixing part 4131 and the second fixing part 4132, the first conductive glue 411 is fixed on the first fixing part 4131, the second conductive glue 412 Being fixed on the second fixing part 4132, the first fixing part 4131 and the second fixing part 4132 can be stretched and pressed independently. As shown in FIG. 5 , only the second fixing part 4132 is in a stretched state, that is, only the second conductive glue 412 is in a conductive state, so that the electrical detection of the second branch 323 can be performed independently without being affected. The influence of other branches. Here, the conduction mode of the first conductive glue 311 or the second conductive glue 312 is not limited, it only needs to meet the requirement of independent control.

FIG. 6 is a flowchart of a method for using the detection device in FIG. 3 . Please refer to FIG. 3 and FIG. 6 together. The present invention also provides a method 500 for using a detection device for electrical detection of the circuit board 320 .

The circuit board 320 includes a connector 321, a first branch 322 and a second branch 323, the first branch 322 includes a first gold finger group 3221, a first line 3222 and a first component (not shown), the first line 3222 and a first component (not shown) electrically connect the first gold finger group 3221 and the connector 321, the second branch 323 includes a second gold finger group 3231, a second line 3232 and a second component (not shown), The second circuit 3232 and the second element (not shown) are electrically connected to the second golden finger set 3231 and the connector 321 , wherein the first branch 322 and the second branch 323 are connected in parallel. The detection device 310 includes a first conductive glue 311 and a second conductive glue 312, the first conductive glue 311 corresponds to the first branch 322, and is used to detect the electrical properties of the first branch 322, and the second conductive glue 312 corresponds to the second branch 322. The branch circuit 323 is used to detect the electric property of the second branch circuit 323 . In this embodiment, the first conductive adhesive 311 has conductive cloth and colloid, the conductive cloth is coated on the colloid, and the conductive cloth is used for the conductive function during electrical testing. contact damage. Of course, in other embodiments, the first conductive adhesive 311 can also be conductive foam or other conductors, and it only needs to meet the conductive requirements of the first conductive adhesive 311 .

The method of use 500 includes:

Step S1: Detect whether the electrical properties of the connector 321 are good, that is, conduct an open circuit test and a short circuit test between two wires of the pins of the connector 321 to detect whether the electrical properties are good, if so, go to step S2, if If not, proceed to step S6;

Step S2: Pressing and conducting the first conductive adhesive 311 and the second conductive adhesive 312 at the same time to check whether the electrical properties are good, if yes, go to step S3, if not, go to step S6;

Step S3: Turn on only the first conductive adhesive 311 to check whether the electrical property is good, if yes, go to step S4, if not, go to step S6;

Step S4: Turn on only the second conductive adhesive 312 to check whether the electrical property is good, if yes, go to step S5, if not, go to step S6;

Step S5: record that the circuit board 320 is a good product;

Step S6: Record that the circuit board 320 is defective.

In this way, through steps S3 and S4, the first branch 322 and the second branch 323 connected in parallel are separately detected, which can improve the undetectable situation when there are parallel branches in the circuit board 320, thereby improving the performance of the circuit board 320. measurable rate. To test the parallel branches corresponding to all the golden finger groups in the circuit board 320 , conduct the corresponding conductive adhesives one by one according to the above steps and perform testing, which will not be repeated here.

The detection device 310 also includes a conduction control unit 313, and the conduction control unit 313 includes a first switch 3131 and a second switch 3132 connected in parallel. In the step S2 and the step S3, the first switch 3131 controls the flow of the first conductive glue 311. Conduction or not, in step S2 and step S4 , the second switch 3132 controls whether the second conductive glue 312 is conduction or not. In this embodiment, the conduction between the first conductive glue 311 and the second conductive glue 312 is determined by opening and closing the first switch 3131 and the second switch 3132 . In other embodiments, the conduction of the first conductive glue 311 or the second conductive glue 312 can also be independently controlled in other ways, such as another embodiment of the detection device of the present invention shown in Figure 5, the detection device 410 includes The first conductive glue 411, the second conductive glue 412 and the fixing unit 413, the fixing unit 413 includes the first fixing part 4131 and the second fixing part 4132, the first conductive glue 411 is fixed on the first fixing part 4131, the second conductive glue 412 Fixed on the second fixing part 4132, the first fixing part 4131 and the second fixing part 4132 can be pressed together independently. In step S2 and this step S3, the first fixing part 4131 expands and contracts to control the conduction and contact of the first conductive adhesive 411. No, in step S2 and step S4 , the second fixing part 4132 expands and contracts to control whether the second conductive glue 412 is conductive or not.

To sum up, the present invention can perform independent electrical detection of the first branch circuit and the second branch circuit connected in parallel through the independently controlled first conductive glue and the second conductive glue, which can improve the performance of parallel branch circuits in the circuit board. Untestable situation, thereby improving the testability rate of the circuit board.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes All changes and modifications should belong to the scope of protection of the appended claims of the present invention.

Claims (10)

1. a kind of detection means, for the electrical detection of circuit board, it is characterised in that

The circuit board includes：

Connector；

Tie point, the tie point includes the first golden finger group, first line and the first element, and the first golden finger group passes through The first line and the first element are electrically connected to the connector；And

Second branch road, second branch road includes the second golden finger group, the second circuit and the second element, and the second golden finger group passes through Second circuit and the second element are electrically connected to the connector, and second branch road is parallel with one another with the tie point；

The detection means includes：

First conducting resinl, corresponding to the tie point, is used to detect the electrical of the tie point；And

Second conducting resinl, corresponding to second branch road, is used to detect the electrical of second branch road, first conducting resinl with this second The conducting control of conducting resinl is separate；

Wherein, by turning on one of first conducting resinl and second conducting resinl, with to the tie point and this second One of road carries out electrical detection.

2. detection means as claimed in claim 1, it is characterised in that the detection means also includes conducting control unit, and this is led Logical control unit includes the first switch, the second switch that are in parallel, and the first switch electrically connects first conducting resinl to control this Whether the conducting of the first conducting resinl to be, the second switch electrically connect second conducting resinl with control the conducting of second conducting resinl with It is no.

3. detection means as claimed in claim 1, it is characterised in that the multiple golden fingers in the first golden finger group receive same Plant signal.

4. detection means as claimed in claim 1, it is characterised in that first conducting resinl has conductive fabric and colloid, and this is led Electric cloth coats the colloid.

5. detection means as claimed in claim 1, it is characterised in that the detection means also includes fixed cell, this first is led Electric glue is fixed on the fixed cell with second conducting resinl.

6. detection means as claimed in claim 5, it is characterised in that the fixed cell includes the first fixed part with the second fixation Portion, first conducting resinl is fixed on first fixed part, and second conducting resinl is fixed on second fixed part, first fixed part With second fixed part can independent telescope pressed.

7. a kind of application method of detection means, for the electrical detection of circuit board, it is characterised in that

The circuit board includes：

Connector；

Tie point, the tie point includes the first golden finger group, first line and the first element, and the first golden finger group passes through The first line and the first element are electrically connected to the connector；And

Second branch road, second branch road includes the second golden finger group, the second circuit and the second element, and the second golden finger group passes through Second circuit and the second element are electrically connected to the connector, and second branch road is parallel with one another with the tie point；

The detection means includes：

First conducting resinl, corresponding to the tie point, is used to detect the electrical of the tie point and first element；And

Second conducting resinl, corresponding to second branch road, is used to detect the electrical of second branch road and second element, and this first is led Electric glue is separate with the conducting control of second conducting resinl；

The application method includes：

Step S1：Whether the electrically good of the connector is detected, if so, then enter step S2, if it is not, then entering step S6；

Step S2：First conducting resinl, second conducting resinl are pressed and simultaneously turn on, whether detection is electrically good, if so, then entering Enter step S3, if it is not, then entering step S6；

Step S3：First conducting resinl is only turned on, whether detection is electrically good, if so, then enter step S4, if it is not, then entering Step S6；

Step S4：Second conducting resinl is only turned on, whether detection is electrically good, if so, then enter step S5, if it is not, then entering Step S6；

Step S5：The circuit board is recorded for non-defective unit；

Step S6：The circuit board is recorded for defective products.

8. the application method of detection means as claimed in claim 7, it is characterised in that the detection means also includes that conducting is controlled Unit, the conducting control unit includes the first switch, the second switch that are in parallel, and in step S2 and step S3, this One switch control first conducting resinl conducting whether, in step S2 and step S4, the second switch control this second Whether is the conducting of conducting resinl.

9. the application method of detection means as claimed in claim 7, it is characterised in that the detection means also includes fixed single Unit, the fixed cell includes the first fixed part and the second fixed part, and first conducting resinl is fixed on first fixed part, and this second Conducting resinl is fixed on second fixed part, and first fixed part can be pressed independently with second fixed part, in step S2 In step S3, whether is the flexible conducting to control first conducting resinl of first fixed part, in step S2 and the step In S4, whether is the flexible conducting to control second conducting resinl of second fixed part.

10. the application method of detection means as claimed in claim 7, it is characterised in that first conducting resinl has conductive fabric And colloid, the conductive fabric coats the colloid.