JPH02186278A - Part measuring apparatus - Google Patents

Abstract

PURPOSE:To facilitate the judgement of the propriety of a measuring apparatus by opening or closing sets of connection lines provided between a plurality of measuring units and a test board wherein parts to be measured is not carried with a switch to test the connection line selected with a multimeter. CONSTITUTION:A plurality of measuring units 2a and 2b are connected to a test board 4 yet to carry parts to be tested with sets of connection lines 30 and 31 and 32 and 33 through switches S10-S13. A multi-meter 17 is connected to any of switch couples (S20 and 21), (S22 and 23) and (S24 and 25) selected by a selection means 41. By a command from a testing section 15, relay contacts S10-S13 and S20-25 of the switch 40 and the selection means 41 are controlled to form a specified measuring circuit. An impedance and a voltage are measured with the multi-meter 17 and the results are compared with an expected value stored in the testing section 15 to judge the propriety thereof. This facilitates the judgement of the presence of an abnormality of the circuit thereby preventing a breakage of parts to be measured.

Description

[Detailed description of the invention] (wc essential) The present invention relates to a component measuring device, and an object of the present invention is to check the connected state of a test board to which a component to be measured is inserted and removed before mounting the component. A component measuring device comprising a test board, a measurement unit that supplies test signals to the test board and measures output, and a connection mechanism that connects the measurement unit and the test board, the measurement unit and the connection mechanism a switch that disconnects each of the connecting wires connecting said switch and said connecting mechanism; selecting means for selecting and drawing out two predetermined sets of said connecting wires from said plurality of said connecting wires between said switch and said connecting mechanism; a measuring section that measures a predetermined characteristic between the connecting wires; and controlling the selecting means to connect the connecting wire to be measured to the measuring section and controlling the connection or disconnection of the switch to cause the measuring section to measure. At the same time, a test section is provided to compare the obtained measured value and the corresponding expected value, and the predetermined characteristic is measured with the test board without the component to be measured connected, and the obtained measured value and The normality of the test board and the connection state of the test board are tested by comparing the test board with an expected value.

[Industrial application field]

The present invention relates to an improvement in a component measuring device.

The measurement unit W (hereinafter referred to as the tester), which measures various electrical characteristics of semiconductor components, etc., is capable of measuring multiple types of components, so test boards are prepared according to the components to be measured, and a programmable power supply is installed using the connection mechanism. , a signal generator, etc., for each measurement.

This measurement unit uses FORCI! to eliminate the effects of cable impedance up to the test board and contact resistance of the connection mechanism. In addition to the line (supply line), 5ENSE
Since a line (feedback! 151) is provided to supply a predetermined signal to the test board, FOR
If a connection failure occurs between the CB line and the 5BNSE line,
There is a risk that abnormal voltage will be supplied to the FORCB line and destroy the component under test.

This test board is prepared by the user in accordance with the parts to be measured, and there is a desire to check for failures such as connection failures and contacts, and to depack the manufactured test board.

[Prior Art 1] Hereinafter, in order to further clarify the gist of the present invention, an outline of the tester will be explained.

FIG. 3 is a block diagram of a conventional tester.

In FIG. 3, a plurality of measuring units 2a, 2b are controlled to a predetermined voltage,
A power source such as a current and a test signal are supplied to the test board 4, and the output signal of the integrated circuit IC, which is the component to be measured, is measured.

The test board 4 includes a socket 6 corresponding to the IC to be measured;
A setting circuit 5 that switches and connects the socket terminal and the specified measurement units 2a, 2b and connects a load, etc. to the output terminal is mounted on a printed board, and can be used as a connector or a bogo contact bin (a contact bin with a spring). It is connected to the measuring units 2a, 2b by a connection aJR3 consisting of, etc.

The connecting lines are the supply lines (FO
RCB line) 31. In addition to the IC output lines, etc., the FORCE line 3C color wire is connected within the test board 4 to 5ENSt! For example, the measuring unit 2a has 5 wires 30.
Referring to the ENSE line 30, a signal is output to FORCB 11A31.

With this, FORCE line 3C color line! m 5BNSE line 3
A predetermined signal is supplied at the connection point P with 0, and the connection mechanism 3
, FORCE line 3C color line - bull impedance etc. are corrected and a predetermined voltage is supplied to the test board 4.

As described above, since the outputs of the tester measurement units 2a and 2b can be set programmably, measurements can be made under various conditions by controlling the setting circuit 5 of the test board 4, and the test board 4 can be replaced. This makes it possible to measure multiple types of parts.

[Problem to be solved by the invention]

Test boards are usually prepared by users, and as the number of pins increases, failures such as poor connections and contacts are more likely to occur.

In particular, if there is a poor connection between the FORCB line and the 5ENSE line, there is a possibility that an abnormal voltage will be applied to the component to be measured, which may result in destruction.

Another problem is that it is not easy for users to debug the test boards they have created.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a component measuring device that checks a test board before components are mounted while connected to the measuring device.

Means for Solving Problem C] In order to achieve the above object, the component measuring device of the present invention has a measuring unit (2) as shown in FIG.
and a switch (40) that disconnects each connection line (35) connecting the connection mechanism (3) and the connection mechanism (3);
a selection means (41) for selecting and drawing out the connecting wires of the set; and a measuring section (41) for measuring a predetermined characteristic between the selected connecting wires.
42), controlling the selection means (41) to connect the connection line of the measurement object to the measurement section (42) and controlling the connection or disconnection of the switch (40) to send the measurement to the measurement section (42); and a test section (15) for comparing the obtained measured value and the corresponding expected value.

[For production]

The test section 15 sets the switch 40 to the disconnected state and controls the selection means 41 to select a predetermined 2m1i connection line 3.
Select 5 (including ground wire).

As a result, a measurement circuit can be formed looking at the test board 4 side with the measurement unit 2 open, and the measurement section 42 consisting of a multimeter etc. can be used to measure impedance, and the obtained measurement value and expected value (pre-measured normal value).

For example, PORCE line -5ENSf! The normality of the test board 4 and the connection state of the test board 4 to the measurement unit 2 are determined by measuring the resistance value between the lines, the resistance value between each connection line 35 and the ground, etc., and comparing them with the expected values. .

In addition, the switch 40 is set to the connected state, and the measurement unit 2
A predetermined voltage output is instructed to the supply line, and the measured voltage value of the supply line is compared with the instructed voltage value (expected value) to verify normality.

The above measurements are performed sequentially by sequentially controlling the switch 40 and the selection means 41, and are compared with expected values to test the normality and connection status of the test board 4 during debugging and connection. can do.

〔Example〕

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a tester block diagram of the embodiment.

FIG. 2 shows FORCE wires 31.33, 5ENSE H2O, 32 and ground wire GND as connection wires 35 to be measured. 2b and the setting circuit 5 to perform measurement control of the part under test, collect measurement results, and output specified voltages and signals to the measurement units 2a and 2b according to instructions from the test section 15; S10 ．． S11. S12. 520, 321, 522, 523 and S24. S
25 are relay contacts constituting the selection means 41, and are individually controlled by the test section 15 to connect the two sets of connecting wires 35.
17 is a multimeter that measures impedance, voltage, etc. according to instructions from the test section 15, and outputs a digital value as a measured value. 15 is a test section that connects a switch. 40. Set a predetermined measurement circuit by controlling each relay contact of the selection means 41, and instruct the multimeter 17 to switch between impedance measurement and voltage measurement, and instruct the control device 1 to output a test signal. The multimeter 17 performs test control and compares the measured value output by the multimeter 17 with the expected value to verify normality. The same reference numerals represent the same objects throughout the other figures.

Note that the expected value is measured in advance using a normal test board 4 or calculated value, and is registered so that the test section 15 can refer to it.

When the test board 4 with no components to be measured is connected to the tester having the above configuration through the connection mechanism 3 and a test instruction is input, the following measurements are performed under the control of the test section 15.

Tests will be conducted sequentially.

(1) Resistance value measurement between PORCE vA-5ENSE wire S10. S11. S12. S13 is opened, 520 and 521 are closed (S22 to 525 are open), and the multimeter 17 is instructed to measure impedance.

This creates the FORCE line (F in the diagram) 31 and 5ENS
The resistance value (expected value is cable impedance) between the E line (SE) 30 is output from the multimeter 17 to the test section 15, and the test section I5 compares it with the corresponding expected value to verify normality.

Next, 520. Open S21, S22. Close S23, measure the impedance between the PORCE line 33 and the 5ENSE line 32, and compare it with the expected value.

As described above, the normality of the connection state between the FORCLE line and the corresponding 5ENSE line is determined.

(2) Impedance measurement 52 between measurement unit connection lines
By closing only S23 or S21, 322, the impedance is measured and the measurement unit 2a
, 2b is verified.

Note that if the connection is made with a resistor or the like within the test board 4, the setting circuit 5 is controlled in various ways for verification.

In this case, the control device 1 is instructed to perform setting control.

(3) FORCE &9f, 5ENS! ! Line-to-ground impedance measurement S20 and 525 are closed and all others are open.

As a result, the impedance between the 5ENSE line 30 and GND is measured, and it is verified whether or not it is grounded and whether the impedance is normal.

Similarly, when S21 and 525 are closed and all others are opened, the impedance between the FORCE wire 3l and GNl is measured.

Thereafter, with similar control, the impedance between each connection line and GND is measured, and its normality is verified.

(4) Close the output checks 510-313 of each measurement unit, connect each connection line 35 and GND to the multimeter 17 using the selection control in (3) above, and instruct the control device 1 to set the setting circuit 5. The measurement units 2a and 2b output a predetermined voltage.

As a result, the output voltage of each connection line 35 is measured, and normality is verified by comparing it with the output-instructed voltage (expected value).

The verification results are output to an output device (not shown), but only abnormal data is output as a message, or all measured values and corresponding expected values are output, and abnormal data is marked.

As described above, the impedance between the connecting wires (including the ground wire) and the output of the measurement unit are measured by the relay control and the connection (selection) control to the multimeter 17, and by comparing them with the expected values, the test board 4 It is possible to check the connection state of the test board 4 as well as the connection state of the test board 4.

In the example, the FORCfi line and the 5ENSE line were used as examples, but it goes without saying that the same procedure can be applied to other connection lines (output lines, etc.), and the measurement values are sent to a printer etc. without checking the normality. Of course, a method of outputting the corresponding expected value may also be used.

〔Effect of the invention〕

The present invention provides a component measuring device that performs tests with a test board connected. ■ When trouble occurs, it is possible to isolate the location where an abnormality has occurred, and the man-hours and time required for repair can be significantly reduced. ■Easily check for poor contact in the connection mechanism, prevent problems such as destruction of the parts being measured, and improve the reliability of measurement results.■
The time required to debug test boards can be significantly reduced.
There are other effects.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram of the present invention, FIG. 2 is a block diagram of a tester according to an embodiment, and FIG. 3 is a block diagram of a conventional tester. In the figure, 1 is a control device, 2.2a, 2b are measurement units,
3 is a connection mechanism, 4 is a test board, 5 is a setting circuit, 6 is a socket, I5 is a test section, 17 is a multimeter, 40 is a switch, 41 is a selection means, 42 is a measurement section, 35 is a connection wire, sio~ S13,520 to S25 are relay contacts.

Claims (1)

[Claims] A test board (4) into which a part to be measured is inserted and removed, and a measurement unit (2) which supplies a test signal to the test board and measures the output.
) and a connection mechanism (3) that connects the measurement unit and the test board, the connection line (35) that connects the measurement unit (2) and the connection mechanism (3). a switch (40) that disconnects each of the plurality of connection lines (30) between the switch and the connection mechanism;
5), a selection means (41) for selecting and drawing out two predetermined sets of connection lines; and a measurement unit (41) for measuring a predetermined characteristic between the selected connection lines.
42), controlling the selection means (41) to connect the connection line of the measurement object to the measurement section (42) and controlling the connection or disconnection of the switch (40) to send the measurement to the measurement section (42); A test section (15) is provided to compare the obtained measured value with the corresponding expected value, and the predetermined characteristic is measured with the test board without the component to be measured connected. A component measuring device characterized in that the normality of the test board and the connection state of the test board are tested by comparing measured values and expected values.