DE19953726A1 - Test equipment for integrated circuits can move test device into contact with the circuit card, traverse it two horizontal directions and rotate it - Google Patents

Abstract

The circuit card (12) to be tested is accommodated on an adapter (13). The measuring/test device (9), guided by a tube (14), can be moved into contact with the circuit, traverse in two horizontal directions and also rotated, by servo motors. The position of the measurement device can be recorded by a camera (34) the image being automatically and rapidly processed, in a computer

Description

State of the art

The invention is based on a test device for electronic Components as a test object, especially printed circuit boards, according to Genus of the main claim. Testing highly complex Printed circuit boards or the like takes place in the known, generic Testing devices based on the so-called flying probe tester which individual finger is scanning the circuit board, which is not is only lengthy, but also time-consuming and therefore expensive.

As such, it is also known to measure readings from testing evaluate electronic components via a computer and use a positioner that Measuring device, which with a contactor or sensor works on approaching the test specimen and then the test specimen Scanning the surface using a cross method.  

The invention and its advantages

The testing device according to the invention with the characteristic In contrast, features of the main claim have the advantage that on the one hand a very high positioning accuracy of +/- 10 µ is attainable and that on the other hand the scanning or Contact can be made very quickly and yet precisely. On the one hand, twisting can result in angular errors in the layout be balanced and on the other hand benefit printed circuit boards that for manufacturing use with twisted single circuit boards are provided, are completely grasped by the twisting. An adaptation that is complex and expensive without being rotatable is avoided.

According to an advantageous embodiment of the invention works the registration device with an image processing system, wherein according to a further embodiment of the invention Image processing system with a camera and automatic Image processing works. The images captured with the camera are processed quickly in a computer and in electronic controller sizes implemented, which in turn, each according to the program, an adjustment of the positioner via the Effect transportation.

According to a further advantageous embodiment of the invention the positioner has one that receives the wiring Guide tube with frontal interface to the adapter, which by the transport device in the longitudinal direction and across it in two, enclosing a right angle Directions can be adjusted linearly and around the longitudinal axis is rotatable. This enables the positioner in all three Spatial directions are adjusted and also rotated.

According to a further advantageous embodiment of the invention the guide tube is rotatably mounted in a slide,  the slide with a stroke bearing in the tube axis and Cross bearing in two coordinate directions across the axis is adjustable. The bearings are carried out with the help of roller bearings, the aim is to keep the mass as low as possible, to turn around u. Like. As quickly as possible and with little loss shape.

According to a further advantageous embodiment of the invention the carriage is adjusted and the Guide tube over servomotors. All four can Functions, namely three linear functions and one Twisting function, each via independent servomotors respectively.

According to a further advantageous embodiment of the invention is a light in the guide tube with the wiring exchangeable insert available so that when changing the Type of test object, the plug-in that can also be changed easily is interchangeable.

According to a further advantageous embodiment of the invention the connection to the computer, screen, etc. takes place on the Interface to the side of the insert facing away from the adapter via one attached to the slot and so with the Guide tube moving connector. That way achieved on the one hand that when exchanging the plug-in Connector is also replaced and that on the other hand, none during the movements of the guide tube Loose contacts or the like can arise.

In a further advantageous embodiment of the invention the adapter is arranged on a face of the guide tube Interchangeable mounting plate. That way when changing the type of the device under test in simple and the adapter can also be replaced more quickly.  

According to a further advantageous embodiment of the invention the insertion takes the form of a cable with or without Measuring electronics.

According to a further advantageous embodiment of the invention can two units consisting of adapter and Positioning device, the test specimen of both Scan sides.

Further advantages and advantageous configurations of the Invention are the following description, the drawing and removable from the claims.

drawing

An embodiment of the object of the invention is in shown in the drawing and described in more detail below.

Show it:

Fig. 1 is a side view of the test apparatus, partly in longitudinal section,

Fig ° twisted. 2 is a second side view of the test apparatus 90,

Fig. 3 shows a detail of Fig. 2 on an enlarged scale and

Fig. 4 shows a detail of Fig. 1 on an enlarged scale.

Description of the embodiment

In the test device shown in the drawing, partly in section, but largely to scale, a fixing device 5 for printed circuit boards is arranged in a housing 1 , which is set up on a floor 2 , between base plates 3 and 4 . These printed circuit boards are driven via a fixing slide 6 of the fixing device via a servomotor 7 , moved to the left in a test position on a guide 8 in FIG. 1, specifically between two measuring devices 9 and 11 and fixed there. The measuring devices 9 and 11 are adjustably attached to the base plates 3 and 4 . After the test object, for example the printed circuit board, has been run in via the fixing device 5 , the measuring devices 9 and 11 are moved in the direction of the test object, after which the test measurement can begin. The measurement results are evaluated in a computer, which is not shown here. The retraction of the fixing device 5 and the movement of the measuring device 9 and 11 is largely automatic. While in Fig. 1, only the measuring device is moved to test position 9, are shown in FIG. 2, both measuring devices 9 and 11 in the test position. Basically, both measuring devices 9 and 11 are identical, only that the measuring device 9 approaches the test object 12 from below, while the measuring device 11 approaches the test object 12 from above.

In Fig. 3, the measuring device 11 is shown on an enlarged scale compared to Figs. 1 and 2. The test specimen 12 is tested via an adapter 13 , which is carried by a guide tube 14 of a transport device which has a slide system 15 for the horizontal adjustment of the guide tube 14 in two flat directions, which form a right angle to one another. This slide system 15 has a first slide 16 for one movement and a second slide 17 for the transverse direction of adjustment, the bearing being carried out via roller bearings 18 and 19 , respectively. The drive takes place by means of servomotors 21 , of which only those for the one adjustment direction are shown in FIG. 3.

The transport device also has a lifting and rotating device for the guide tube 14 , with a servomotor 23 for the stroke adjustment and a servomotor 24 for rotating the guide tube 14 . The adjustment and the rotation of the guide tube 14 takes place within a bushing 25 which is non-rotatably connected to the slide 16 and 17 , so that this bushing 25 experiences the horizontal adjustment via the slide system 15 , however the stroke adjustment and the rotation of the guide tube 14 are carried out independently thereof becomes.

In the section of FIG. 1 shown in FIG. 4 in a partial section on an enlarged scale, relating to the measuring device 9 , the same reference numbers have been chosen for the corresponding parts of this measuring device as for FIG. 3. On the guide tube 14 there is a mounting plate 26 for arranged the adapter 13 , which in turn interacts with the test object 12 . The adapter 13 is respectively adapted to the test specimen and is connected to it via an interface 27 of a wiring insert 28 , the wires being connected at the end 29 of the wiring insert 28 facing away from the interface 27 to a connector plug 31 , from which the measured values to the Control device are conductive. Depending on the type of test object 12 , the adapter 13 and the wiring unit 28 can thus be replaced in a simple manner with respect to the guide tube 14 without the measuring device having to be changed otherwise.

The guide tube 14 is mounted in the bushing 25 via a roller bearing 32 , which permits both a lifting and a rotational movement of the guide tube 14 relative to the bushing 25 . The corresponding drive via the actuators 23 and 24 takes place with the interposition of driving rings 33 .

The respective rotational and stroke position is recorded by a camera 34 and communicated to the computer.

All in the description, the following claims and The features shown in the drawing can be both individually as well as in any combination with each other be essential to the invention.  

List of reference numbers

1

casing

2nd

ground

3rd

Base plate

4th

Base plate

5

Fixing device

6

Fixing slide

7

Servomotor

8th

guide

9

Measuring device

10th

-

11

Measuring device

12th

Examinee

13

adapter

14

Guide tube

15

Carriage system

16

first sled

17th

second sledge

18th

roller bearing

19th

roller bearing

20th

-

21

Servomotor

22

Lifting and rotating device

23

Servomotor

24th

Servomotor

25th

Rifle

26

Mounting plate

27

interface

28

Wiring rack

29

The End

30th

-

31

plug

32

roller bearing

33

Drive ring

34

camera

Claims (11)

1. Tester

• - For electronic components as test object ( 12 ), in particular printed circuit board or the like,
• - With a fixing device ( 5 ) of the test object ( 12 ),
• - With a relative to the test object ( 12 ) and an adapter ( 13 ) with contact or the like. Measuring device ( 9 , 10 ) and
• with a computer device for evaluating the measured values,

characterized by

• - that a positioning device for the adapter ( 13 ) is provided for moving and positioning the measuring device ( 9 , 11 ) in relation to the test object ( 12 ),
• - That the positioning device has a transport device ( 14 , 15 ) with a carriage system ( 15 ) which can be moved in two coordinate directions,
• - That the transport device has a stroke adjustment ( 32 , 23 ) in the direction of the test specimen ( 12 ),
• - That a registration device ( 34 ) for the respective position of the adapter ( 13 ) with respect to the test object ( 12 ) is present and
• - That the transport device ( 14 ) for the sensor ( 14 , 28 ) is additionally rotatable.

2. Testing device according to claim 1, characterized in that the registration device works with an image processing system ( 34 ). 3. Testing device according to claim 2, characterized in that the image processing system works with a camera ( 34 ) and automatic image processing. 4. Test device according to one of the preceding claims, characterized in that the positioner has a wiring-receiving, an end face interface to the adapter ( 13 ) having guide tube ( 14 ), which includes a right angle through the transport device in the longitudinal direction and in two transverse to it Directions are linearly adjustable and rotatable about the longitudinal axis. 5. Testing device according to claim 4, characterized in that the guide tube is rotatably mounted in a slide system ( 15 ) and is adjustable relative to the slide system via a lifting bearing ( 32 ). 6. Testing device according to claim 5, characterized in that the adjustment of the slide system ( 15 ) and the rotation and stroke adjustment of the guide tube ( 14 ) via servomotors ( 21 , 23 , 24 ). 7. Testing device according to one of claims 4 to 6, characterized in that in the guide tube ( 14 ) has a wiring, easily replaceable wiring insert ( 28 ) is present. 8. Test device according to claim 7, characterized in that at the, the adapter ( 13 ) facing away from the guide tube ( 14 ) for the connection to the computer there is a connector ( 31 ) of the wiring, which with the guide tube ( 14 ) whose adjustment is moved. 9. Testing device according to one of the preceding claims, characterized in that the adapter ( 13 ) on an end face on the guide tube ( 14 ) arranged mounting plate ( 26 ) is exchangeably attached. 10. Testing device according to one of claims 4 to 9, characterized in that the wiring insert ( 28 ) is in the form of a cable, with or without measuring electronics. 11. Testing device according to one of the preceding claims, characterized in that two measuring devices ( 9 , 11 ) are provided, via which the test object ( 12 ) can be tested from both sides.