JPH09304466A - Apparatus for inspecting circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently inspect circuit boards. SOLUTION: A circuit board-inspecting jig 1 is provided in the apparatus, which has a plurality of circuit-board probes 5 fit to both an in-circuit inspection of inspecting an electric characteristic, a conduction state or the like of a circuit board 4 and a functional inspection of checking an operation of elements on the circuit board 4, etc. A separator 2 activates the necessary substrata probe 5 among the plurality of circuit-board probes 5 of the jig 1 correspondingly to the inspection to be carried out, namely, either the in-circuit inspection or the functional inspection. The remaining circuit-boards proves 5 are treated so as not to electrically influence the inspection to be carried out. A control means 3 selects and sets the separator 2 in a state corresponding to the inspection to be carried out and controls the jig 1 correspondingly to the inspection to be carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board inspection apparatus used for in-circuit inspection for inspecting electrical characteristics and continuity of a circuit board and for functional inspection for operation check of elements on the circuit board.

[0002]

2. Description of the Related Art The inspection of a circuit board is roughly classified into an in-circuit inspection for inspecting electrical characteristics and continuity of the circuit board and a function inspection for operation check of elements on the circuit board. Conventionally, both of the above inspections are performed separately as follows.

That is, in the in-circuit inspection, the circuit board is set on a dedicated in-circuit inspection jig having a plurality of board contacts corresponding to the inspection, and the inspection is performed by a control device such as a personal computer. The insert inspection jig is controlled by a program. In the function inspection, the circuit board is set on the function inspection jig dedicated to the inspection, and the function inspection jig is controlled by the control device by the program corresponding to the inspection.

[0004]

However, in such an inspection method, it is necessary to reset the circuit board in a dedicated jig for each inspection, and the connector insertion and removal work is very frequent. There was a problem that the work efficiency of was extremely poor.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a board inspection apparatus capable of efficiently inspecting a circuit board.

[0006]

A board inspection apparatus of the present invention is used for both in-circuit inspection for inspecting electrical characteristics and continuity of a circuit board, and functional inspection for operation check of elements on the circuit board. A board inspection jig having a plurality of compatible board contacts, and a board contactor corresponding to an inspection to be executed among the board contacts of the board inspection jig are activated, and the remaining board contacts Selects and sets a separator that processes so as not to electrically affect the inspection to be performed, and a state in which the separator corresponds to the inspection to be performed, and supports the inspection to be performed on the board inspection jig And a control means for performing control.

When a field programmable gate array (FPGA) is provided on the circuit board, the board inspection jig has not only the board contact but also a board contact for writing the FPGA. In addition to the in-circuit inspection and the function inspection, the control means may selectively perform writing control of the FPGA on the board inspection jig.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. This board inspection device is used for in-circuit inspection of circuit boards, implementation of function inspection, and FP
GA (Field Programmable Gate Array: Field
A device used for writing a programmable gate array), and as shown in FIG.
The separator 2 and the control means 3 are provided. Here, the in-circuit inspection is an inspection of the electrical characteristics and continuity of the circuit board 4, and the functional inspection is an inspection of the circuit board 4.
The operation of the above elements is checked. Also, F
The writing of PGA is to program the FPGA on the circuit board 4 (selectively write a predetermined function).

The board inspection jig 1 includes a pin board 6 on which the circuit board 4 to be inspected is mounted, and a top plate 7 arranged above the pin board 6, and the pin board 6 is a circuit board. The top plate 7 has a plurality of contact pins 5, which are substrate contacts capable of contacting the respective predetermined electric paths 4, and the top plate 7 has a plurality of pressing pins 8. By pushing down the top plate 7, the circuit board 4 is sandwiched between the pin board 6 and the pressing pin 8 of the top plate 7, and the circuit board 4 comes into contact with the predetermined electric path corresponding to the contact pin 5. The substrate inspection jig 1 is set in this state. When the top plate 7 is lifted, the pressing pin 8 separates from the circuit board 4 and is released from the set state. As the contact pins 5, one corresponding to the in-circuit test, one corresponding to the function test, and one corresponding to the writing of the FPGA are provided, respectively.

When one of the in-circuit inspection and the function inspection is selected, the separator 2 is
The contact pins 5 corresponding to the selected inspection among the plurality of contact pins 5 of the board inspection jig 1 are activated (a state in which an electric signal can be exchanged with the control means 3) and the remaining contact pins 5 are activated. Is a device for surely electrically separating so that the selected contact pin 5 is not electrically affected.

The control means 3 is composed of, for example, a personal computer, and the separator 2 is selectively set to either one of the inspection states, and the substrate inspection jig 1 is set.
With the function to control the selected inspection for
The board inspection jig 1 has a function of selectively performing writing control of the FPGA on the circuit board 4.

Next, the operation of the board inspection apparatus will be described with reference to FIG.
This will be described with reference to the flowchart in FIG.

The circuit board 4 to be inspected is placed on the pin board 6 of the board inspecting jig 1, and the process selection is input by the keyboard of the control means 3 or the like (step S1). When only the in-circuit inspection process is selected in the process selection, the top plate 7 of the substrate inspection jig 1 is pushed down (step S2), and the circuit board 4 is set on the substrate inspection jig 1. Also, at this time, the switching signal output from the control means 3 sets the separator 2 in a state in which in-circuit inspection is possible. Among the contact pins 5 of the board inspection jig 1, the contact pins 5 corresponding to the in-circuit inspection are activated by the separator 2 thus switched and set, and the remaining contact pins 5 are electrically connected to the in-circuit inspection. Is regulated so that it does not have any significant impact. Then, the in-circuit inspection program 9 is started in the control means 3, and the in-circuit inspection of the circuit board 4 is performed by the signal transmitted / received to / from the board inspection jig 1 via the separator 2 (step S3). If an error such as poor continuity is found as a result of the inspection, an error message is output to the display 3a of the control means 3 (step S).
4). If no error is found as a result of the inspection, the top plate 7 of the board inspection jig 1 is lifted (step S
5), the circuit board 4 is released from the set state on the board inspection jig 1, and the inspection is completed.

In the process selection of step S1, when the process including the function test and the writing of the FPGA is selected in addition to the in-circuit test, first, the board 7 of the board inspecting jig 1 is pushed down so that the board inspecting process Circuit board 4 on tool 1
Is set (step S6), the separator 2 is also set in a state where the in-circuit inspection is possible, and the in-circuit inspection of the circuit board 4 is performed (step S7). When an error is found as a result of the inspection, an error message is output (step S8).

In-circuit inspection (step S7)
As a result, if no error is found, the process switching is executed in the control means 3 according to the process selected by the operator in step S1 (step S9). When only the FPGA writing process is selected by this process switching, the FPGA writing program 1 in the control means 3 is selected.
1 is executed, and a control signal for writing the FPGA is input to the board inspection jig 1 in response to an input from the operator.
As a result, FPGA writing is performed via the FPGA writing contact pin 5 of the board inspection jig 1 (step S10). When the writing is completed, the top plate 7 of the board inspection jig 1 is lifted (step S11), and the circuit board 4 is released from the set state on the board inspection jig 1.

When only the functional inspection is selected in the process switching (step S9), the switching signal output from the control means 3 causes the separator 2 to be switched to the functional inspection enabled state. The contact pin 5 of the board inspection jig 1 is changed by the separator 2 thus switched.
Of these, the contact pin 5 corresponding to the function test is activated,
The remaining contact pins 5 are regulated so as not to electrically affect the function test. Then, the function inspection program 10 is started in the control means 3, and the function inspection of the circuit board 4 is performed by the control signal exchanged with the board inspection jig 1 via the separator 2 (step S1).
2). If a malfunction error is found as a result of the inspection, an error message is output to the display 3a of the control means 3 (step S13). If no error is found as a result of the inspection, the top plate 7 of the board inspection jig 1 is lifted (step S14), the circuit board 4 is released from the set state on the board inspection jig 1, and the inspection is completed. To do.

By the process switching (step S9), the FPG
When the process including the writing of A and the function inspection is selected, first, the FPGA writing program 11 is executed by the control means 3, and the FPGA writing is performed on the board inspection jig 1 according to the operator's input. A control signal for input is input. As a result, predetermined writing is performed on the FPGA on the circuit board 4 via the FPGA writing contact pin 5 of the board inspection jig 1 (step S15). When the writing is completed, the switching signal output from the control means 3 causes the separator 2 to be switched and set to a state in which the function inspection is possible. Among the contact pins 5 of the board inspection jig 1, the contact pins 5 corresponding to the function inspection are activated by the separator 2 thus switched and set, and the remaining contact pins 5 electrically affect the function inspection. It is regulated to not give. Then, the function inspection program 10 starts running in the control means 3, and the function inspection of the circuit board 4 is performed by the control signal exchanged with the board inspection jig 1 through the separator 2 (step S16). Test results,
If a malfunction error is found, an error message is output (step S17). If no error is found as a result of the inspection, the top plate 7 of the board inspection jig 1 is lifted (step S18), the circuit board 4 is released from the set state on the board inspection jig 1, and the inspection is completed. To do.

As described above, when the above-described board inspection apparatus is used, whether only in-circuit inspection is performed, in-circuit inspection and FPGA writing are performed, in-circuit inspection and function inspection are performed, or in-circuit inspection is performed. The inspection, the function inspection, and the writing to the FPGA can be performed by setting the circuit board 4 on the board inspection jig 1 only once, so that the inspection work can be performed efficiently.

[0019]

The board inspection apparatus of the present invention is compatible with a board inspection jig having a plurality of board contacts capable of performing both in-circuit inspection and function inspection, and an inspection to be performed among the board contacts. In addition to activating the substrate contacts to be processed, the separators are processed so that the remaining substrate contacts do not electrically affect the inspection to be performed, and the separators are selectively set in a state corresponding to the inspection to be performed. Since the control means for performing control corresponding to the inspection to be performed on the board inspection jig is provided, the in-circuit inspection and the function can be performed without repeatedly setting the circuit board on the board inspection jig. Both the inspection can be performed, and the substrate inspection can be performed efficiently.

In the board inspecting apparatus, the board inspecting jig is provided with an FPGA writing board contactor in addition to the board contactor, and the control means is arranged on the circuit board with respect to the board inspecting jig. The writing control of the FPGA may be selectively performed. In that case, the writing of the FPGA can be performed in addition to the above-described inspections without repeatedly setting the circuit board on the board inspection jig. It is more efficient because it can.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of a substrate inspection apparatus of the present invention.

FIG. 2 is a flowchart showing an operation of the board inspection apparatus.

[Explanation of symbols]

1 ... Substrate inspection jig, 2 ... Separator, 3 ... Control means, 5
… Contact pins (board contacts)

Claims (2)

[Claims] 1. A board inspection having a plurality of board contacts capable of both an in-circuit inspection for inspecting electrical characteristics and continuity of the circuit board and a function inspection for operation check of elements on the circuit board. The jig and the board contact corresponding to the inspection to be executed among the plurality of board contacts of the board inspection jig are activated, and the remaining board contacts electrically affect the inspection to be executed. A substrate inspection including a separator that is processed so as not to exist, and a control unit that selectively sets the separator to a state corresponding to the inspection to be performed and performs control corresponding to the inspection to be performed on the substrate inspection jig. apparatus. 2. A field programmable gate array (FPGA) is provided on the circuit board, and the board inspection jig includes not only the board contactor but also a writing board contactor of the FPGA. 2. The board inspection apparatus according to claim 1, wherein the control means selectively performs write control of the FPGA in addition to the in-circuit inspection and the function inspection for the board inspection jig.