ATE board card precision automatic detection method

Abstract

The invention relates to the technical field of integrated circuit testing, in particular to an ATE board card precision automatic detection method, which comprises the following steps of S1, switching to a to-be-tested channel of an ATE board card through a relay control circuit; s2, setting different voltage gears and current gears, and outputting different current excitation signals to one end of the precision resistor by adopting a current-increasing voltage-measuring mode; s3, measuring current and voltage at the other end of the precision resistor, and calculating the resistance value of the corresponding calculation resistor according to the Ohm law; s4, the resistance value of the calculation resistor is judged according to the set resistance value range, and the detection result of the channel to be detected is output; and S5, repeating the steps S1 to S4 until the precision detection of the ATE board card is completed. Through cooperative work of the relay matrix and the computer control system, full-process automation of automatic channel switching, intelligent parameter configuration, data acquisition and result judgment is achieved, compared with a traditional manual detection mode, the detection efficiency is improved by 80% or above, and manual operation errors are effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuit testing, in particular to an automatic detection method for ATE board accuracy. Background Art

[0002] In the field of highly sophisticated and complex integrated circuits, chip testing is a critical step in ensuring product performance meets design requirements. ATE board test accuracy is closely linked to chip specifications. Higher ATE test accuracy results in closer chip test results to specifications. This solution is used to monitor ATE board test accuracy and guide engineers in troubleshooting ATE board anomalies.

[0003] CN116449277A discloses a detection and calibration system for ATE test equipment and its control method, which includes: initiating a test request to the ATE test equipment; testing whether the basic functions of all digital channels or power supply channels are normal, and if all basic functions are normal, performing a self-test on the test resource board; the basic functions include driving voltage, measuring voltage, driving current and testing current; if the self-test result is normal, calibrating the self-test result; after the calibration is completed, testing the measurement accuracy of all digital channels or power supply channels; the measurement accuracy includes driving voltage accuracy, measuring current accuracy, driving current accuracy and measuring voltage accuracy; if the measurement accuracy meets the requirements, saving the calibration value in the FPGA, and selecting all channels or a certain measurement item of a certain channel for detection and calibration by the first control switch in the input unit and the second control switch of the resistance adjustment unit, thereby enriching the test function of the ATE test equipment. During detection, the driving current accuracy test (S11) directly compares the driving current Idr and multimeter measured I Mea, measurement current accuracy test (S10) relies on multimeter measurement value I Act is the "true value", and its measurement accuracy is restricted by the accuracy of the multimeter, so there is an error in the detection accuracy. Summary of the Invention

[0004] Aiming at the problem of low detection accuracy of ATE board detection in the prior art, the present invention provides an automatic detection method for ATE board accuracy.

[0005] The present invention is achieved through the following technical solutions: An automatic detection method for ATE board accuracy includes the following steps: S1, switches to the channel to be tested on the ATE board through the relay control circuit; S2, set different voltage and current gears, use the current-adding and voltage-measuring mode to output different current excitation signals to one end of the precision resistor; S3, measure the current and voltage at the other end of the precision resistor, and calculate the corresponding resistance value according to Ohm's law; S4, judging the calculated resistance value within the set resistance range and outputting the test result of the channel to be tested; S5, repeat S1 to S4 until the accuracy test of the ATE board is completed.

[0006] Preferably, there are multiple voltage gears, including 1V gear, 2V gear, 5V gear, 10V gear, 20V gear, and 50V gear.

[0007] Preferably, multiple current gears are provided, including a 100uA gear and a 1mA gear.

[0008] Preferably, the resistance of the precision resistor is 10K.

[0009] Preferably, the resistance range is set according to the precision of the precision resistor and the test accuracy of the FPVI board.

[0010] Preferably, when the calculated resistance value falls within the set resistance range, the channel is determined to be normal.

[0011] The invention discloses an automatic detection system for the accuracy of an ATE board, comprising a computer control system COMPUTER, a system bus BUS, ATE equipment, and a test board DUT. The computer control system COMPUTER and the system bus BUS are interconnected via GPIB communication. The computer control system COMPUTER sends instructions to the system bus BUS, and the ATE receives a response from the DUT test board and returns the response result to the computer control system COMPUTER via the system bus BUS for judgment.

[0012] Preferably, the DUT test board adopts a double-layer board with a nickel-gold process, and the components of the DUT test board include 10 relays, 1 resistor with a resistance accuracy of 0.1%, and 1 64PIN bull socket connector.

[0013] An electronic device includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method when executing the computer program.

[0014] A storage medium stores a computer program, which implements the steps of the method when executed by a processor.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an automatic detection method for ATE board accuracy. Through the coordinated work of a relay matrix and a computer control system, the method realizes full-process automation of automatic channel switching, intelligent parameter configuration, data acquisition, and result determination. Compared with the traditional manual detection method, the method adopts a current-adding and voltage-measuring mode to output different current excitation signals, which can avoid errors in direct current measurement. The detection efficiency is improved by more than 80%, and manual operation errors are effectively avoided.

[0016] Furthermore, by setting different voltage levels and current levels to form a combined test mode, dynamic measurement can be achieved to ensure the effectiveness and accuracy of the measurement.

[0017] Furthermore, using a precision resistor as a reference source can reduce the detection error of the direct detection device itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a flow chart of an automatic detection method for ATE board accuracy of the present invention; Figure 2 This is the appearance of the STS8200-F test system; Figure 3 This is the STS8200-F test system structure diagram; Figure 4 It is the DUT test schematic diagram. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0020] The present invention discloses an automatic detection method for ATE board accuracy, referring to Figure 1 , including the following steps: S1 switches to the channel to be tested on the ATE board through the relay control circuit.

[0021] S2 sets different voltage and current levels, using the current-apply-voltage-measurement mode to output different current excitation signals to one end of the precision resistor. Multiple voltage levels are available, including 1V, 2V, 5V, 10V, 20V, and 50V. Multiple current levels are available, including 100uA and 1mA. The resistor value is 10kΩ.

[0022] S3, measure the current and voltage at the other end of the precision resistor, and calculate the corresponding resistance value according to Ohm's law.

[0023] S4: The calculated resistor value is evaluated within a set resistance range and the test result for the channel under test is output. The set resistance range is determined based on the precision resistor accuracy and the FPVI board test accuracy. If the calculated resistor value falls within the set resistance range, the channel is considered normal. For example, if the precision resistor value is 10K and the 1% precision control deviation range is used, the test value is within the range of 9.9-10.1K, and the board is considered normal.

[0024] S5, repeat S1 to S4 until the accuracy test of the ATE board is completed.

[0025] The invention discloses an automatic detection system for the accuracy of an ATE board, comprising a computer control system COMPUTER, a system bus BUS, ATE equipment, and a test board DUT. The computer control system COMPUTER and the system bus BUS are interconnected via GPIB communication. The computer control system COMPUTER sends instructions to the system bus BUS, and the ATE receives a response from the DUT test board and returns the response result to the computer control system COMPUTER via the system bus BUS for judgment.

[0026] The present invention adopts Huafeng STS8200-F automatic test system, which consists of a test host, a PC, and a test box. This system is a digital-analog mixed signal test system. It can mainly test voltage regulator chips, operational amplifiers, power management chips, audio chips, etc. The STS8200-F automatic test system is based on the test head. The system appearance is as follows: Figure 2 As shown, the system mainly includes PCI test interface module, 8-channel voltage and current source FOVI, 2-channel high-power voltage and current source FPVI, 128-channel user relay driver module CBIT, 4-channel time measurement module QTMU, high-voltage measurement module HVI1K, 8-channel digital measurement module DIO, etc. The system structure is as follows Figure 3 The STS8200-F automatic test system is equipped with TTL and GPIB interfaces, which can be connected to various types of probe stations and handlers. It is programmed in a C / C++ environment and has the ability to save data in multiple formats.

[0027] Reference Figure 4 ,Take a DUT test board as an example for testing. The DUT test board adopts a double-layer board with nickel-gold process. The components of the DUT test board include 10 relays, 1 resistor with a resistance accuracy of 0.1%, and 1 64-pin bull-horn socket connector. The 0 channel and 1 channel of the DUT test board are measured twice at each gear. The test results are shown in Table 1 and Table 2.

[0028] The specific tests are as follows: In the test program, the K9 relay controls channel 0 of the FPVI board, sets the voltage range to 1V, and the current range to 100uA. A 50uA current excitation signal is output to one end of a 10K resistor using the current-apply-measure-voltage mode. The current and voltage are measured at the other end of the resistor. The resistor value is calculated using Ohm's law, and the test result is determined based on the resistor value setting range. Keep the K9 relay controlling the FPVI board's channel 0 state, set the voltage range to 2V, and the current range to 1mA. Use the current-apply-measure-voltage mode to output a 100uA current excitation signal to one end of the 10K resistor. Measure the current and voltage at the other end of the resistor. Calculate the resistor value according to Ohm's law, and determine the test result based on the resistor's resistance setting range. Keep the K9 relay controlling the FPVI board's channel 0 state, set the voltage range to 5V, and the current range to 1mA. Use the current-apply-measure-voltage mode to output a 100uA current excitation signal to one end of the 10K resistor. Measure the current and voltage at the other end of the resistor. Calculate the resistor value according to Ohm's law, and determine the test result based on the resistor's resistance setting range. Keep the K9 relay controlling the FPVI board's channel 0 state, set the voltage range to 10V, and the current range to 1mA. Use the current-apply-measure-voltage mode to output a 500uA current excitation signal to one end of the 10K resistor. Measure the current and voltage at the other end of the resistor. Calculate the resistor value according to Ohm's law, and determine the test result based on the resistor's resistance setting range. Keep the K9 relay controlling the FPVI board's channel 0 state, set the voltage range to 20V, and the current range to 1mA. Use the current-apply-measure-voltage mode to output a 500uA current excitation signal to one end of the 10K resistor. Measure the current and voltage at the other end of the resistor. Calculate the resistor value according to Ohm's law, and determine the test result based on the resistor's resistance setting range. Keep the K9 relay controlling the FPVI board's channel 0 state, set the voltage range to 50V, and the current range to 1mA. Use the current-apply-measure-voltage mode to output a 500uA current excitation signal to one end of the 10K resistor. Measure the current and voltage at the other end of the resistor. Calculate the resistor value according to Ohm's law, and determine the test result based on the resistor's resistance setting range. The test program controls the K10 relay to switch to channel 1 of the FPVI board; The test program controls the K1 relay to switch the FOVI board channel 0; The test program controls the K2 relay to switch channel 1 of the FOVI board; The test program controls the K3 relay to switch channel 2 of the FOVI board; The test program controls the K4 relay to switch the FOVI board's 3 channels; The test program controls the K5 relay to switch the FOVI board's 4 channels; The test program controls the K6 relay to switch the FOVI board's 5 channels; The test program controls the K7 relay to switch the 6 channels of the FOVI board; The test program controls the K8 relay to switch channel 7 of the FOVI board. The test mode and measurement method of the above channels are the same as those of channel 0 of the FPVI board.

[0029] Table 10 Channel test results

[0030] Table 21 Channel test results

[0031] The present invention also discloses an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method when executing the computer program.

[0032] The present invention also discloses a storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described are implemented.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A method for automatically detecting the accuracy of an ATE board, characterized in that: The following steps are involved: S1, switches to the channel to be tested on the ATE board through the relay control circuit; S2, set different voltage and current gears, use the current-adding and voltage-measuring mode to output different current excitation signals to one end of the precision resistor; S3, measure the current and voltage at the other end of the precision resistor, and calculate the corresponding resistance value according to Ohm's law; S4, judging the calculated resistance value within the set resistance range and outputting the test result of the channel to be tested; S5, repeat S1 to S4 until the accuracy test of the ATE board is completed.

2. The automatic detection method for ATE board accuracy according to claim 1, characterized in that: There are multiple voltage gear settings, including 1V gear, 2V gear, 5V gear, 10V gear, 20V gear, and 50V gear.

3. The automatic detection method for ATE board accuracy according to claim 1, wherein: There are multiple current settings, including 100uA and 1mA.

4. The automatic detection method for ATE board accuracy according to claim 1, wherein: The resistance of the precision resistor is 10K.

5. The automatic detection method for ATE board accuracy according to claim 1, characterized in that: The resistance range is set according to the precision of the precision resistor and the test accuracy of the FPVI board.

6. The automatic detection method for ATE board accuracy according to claim 1, characterized in that: When the calculated resistance value falls within the set resistance range, the channel is judged to be normal.

7. An automatic detection system for ATE board accuracy, characterized in that: It includes a computer control system COMPUTER, a system bus BUS, ATE equipment, and a test board DUT. The computer control system COMPUTER and the system bus BUS are interconnected through GPIB communication. The computer control system COMPUTER sends instructions to the system bus BUS, and the ATE receives a response from the DUT test board and returns the response result to the computer control system COMPUTER through the system bus BUS to determine the result.

8. The ATE board accuracy automatic detection system according to claim 7, characterized in that: The DUT test board uses a double-layer board with nickel-gold process. The components of the DUT test board include 10 relays, 1 resistor with a resistance accuracy of 0.1%, and 1 64-pin bull socket connector.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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