JPH03191546A - Inspection of disconnection and short circuit of wiring of board - Google Patents

Abstract

PURPOSE:To inspect a disconnection and a short circuit of an electrode line in a state that a board wiring has been positioned accurately on a joint board by a method wherein a first terminal to a third terminal, for positioning use, which have been connected to an inspection apparatus via a changeover device are installed on the joint board. CONSTITUTION:A first terminal to a third terminal 151 to 153 for positioning use are arranged in respectively prescribed positions on the surface of a joint board 11. The terminals 151 to 153 for positioning use are connected to an inspection apparatus 14 via a changeover device 16; a dislocation in the horizontal direction and the rotation direction of a TFT board can be detected by using the inspection apparatus 14. When the terminals 151 to 153 for positioning use become electrically conductive, an electric current is made to flow to individual electrode wiring from the inspection apparatus 14 in order to inspect whether a disconnection and a short circuit exist or not. Thereby, it is possible to easily inspect the disconnection and the short circuit of the electrode wiring in a state that a board has been positioned accurately on the joint board 11.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for inspecting disconnections and short circuits in electrode wiring (lines) formed on a substrate wiring such as an `rFT substrate of an active matrix liquid crystal display device, for example. It is related to.

[Conventional technology]

Generally, active matrix type liquid crystal display devices have a fourth
As shown in the figure, a liquid crystal 3 is sealed between a TPT substrate 1 and a counter substrate 2, and pixel electrodes 4 arranged in a matrix on the surface of the TPT substrate 1 are selectively turned on and off by thin film transistors (not shown). It is configured to display images using

Therefore, as shown in FIG. 5, the TPT substrate 1 of such an active matrix type liquid crystal display device has a gate electrode line 6 and a drain electrode line 7 for switching the thin film transistor 5, respectively.
They are formed at regular intervals in the vertical and horizontal directions of the PT substrate 1 and are insulated from each other. And, at both ends of each of these electrode lines 6°7, there are lead terminals 3a,
gb are provided and arranged at regular intervals in the vertical direction of the TPT substrate 1 and in the direction 8a.

By the way, the electrode lines 6.7 of such TPT substrate 1
may be disconnected or shorted during the manufacturing process.
If a #T line or a short circuit occurs in the electrode lines 6 and 7, the thin film transistor 5 will not operate normally. For this reason, conventionally, as shown in FIG. 6, the TPT board 1 is connected to the middle 11! The operation of the TPT substrate 1 was tested by placing it on the substrate 11. That is, for example, the lead-out ends T-8a and 8b provided at both ends of the gate electrode line 6 are overlapped with the test end 'T-12 provided on the relay board 11, and in this state, the lead-out ends T-8a and 8b provided at both ends of the gate electrode line 6 are overlapped with the test end 'T-12 provided on the relay board 11, and in this state, the lead-out ends T-8a and 8b provided at both ends of the gate electrode line 6 are placed on top of the test end 'T-12 provided on the relay board 11. Inspection terminal 1
2 to the gate electrode line 6 to check for disconnections and short circuits. Further, the drain electrode line 7 was also inspected for disconnections and short circuits using a similar method.

[Problem to be solved by the invention]

However, according to the above method, if the TPT board 1 is misaligned in the horizontal and rotational directions, the lead terminals 8a, 8b and the inspection terminal 12 may no longer overlap, or the lead terminal 8a may not overlap with the test terminal 12. ,8b
Problems such as straddling the adjacent test terminal 12 may occur.
It was difficult to accurately inspect for disconnections and short circuits.

The present invention was made in view of the above-mentioned problems.
The object of the present invention is to provide a method for inspecting disconnections and short-circuits of substrate wiring, which can inspect electrode lines for disconnections and short-circuits while accurately positioning the substrate wiring such as a TPT substrate on a relay board.

[Means to solve the problem]

In order to solve the above problems, the present invention places a board on which a plurality of electrode wires are formed at regular intervals on the surface and lead terminals are provided at both ends of each electrode wire on a relay board connected to an inspection device. , a method for inspecting disconnections and short circuits of circuit board wiring, in which the six lead-out terminals are superimposed on inspection terminals arranged on the relay board, and a current is passed from the inspection device to each of the electrode wirings to inspect the presence or absence of disconnections and short circuits. , the first to third dummy terminals connected to the substrate are placed at both ends of a group of lead-out terminals arranged on one end side of the electrode wiring and at an end of a group of lead-out terminals arranged on the other end side of the electrode wire. In addition, first to third alignment terminals connected to the inspection device via a switching circuit are provided on the relay board at predetermined positions, and these alignment terminals are electrically conductive. At this time, a current is passed through each of the electrode wirings from the inspection device to inspect for disconnections and short circuits.

[For production]

That is, in the method for inspecting disconnections and short circuits of board wiring according to the present invention, first to third dummy terminals connected to each other are provided on the board at predetermined positions, and the middle 1! By providing the first to third positioning terminals connected to the inspection device via the switching device on the board, it is possible to detect whether the board is shifted in the horizontal direction and rotational direction with respect to the relay board. Therefore, when the alignment terminals on the relay board are electrically connected to each other, a current is sent from the inspection device to each electrode wiring through the inspection terminal, thereby accurately testing whether there is a disconnection or short circuit on the board. be able to.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Note that the same parts as those shown in FIGS. 5 and 6 will be described with the same reference numerals.

FIG. 1 is a plan view of the TPT substrate, and this TPT substrate 1
Gate electrode lines 6 and drain electrode lines 7 for switching the thin film transistor 5 are formed at regular intervals in the vertical and horizontal directions of the TPT substrate 1 and insulated from each other. Output terminals 8a and 8b are provided at both ends of each of these electrode lines 6.degree.7, and are arranged at regular intervals in the vertical and horizontal directions of the TFT substrate 1.

Furthermore, first to third dummy terminals 91, 92*93 are provided at predetermined positions on the TPT substrate 1, respectively. These dummy terminals 919□, 93 are connected to each other via short circuit lines 10a, 10b, and the first
The second dummy terminals 91 and 9□ are located at both ends of a group of lead-out terminals arranged on one end side of the gate electrode line 6 (the lead-out terminal 8a side in the figure), and the third dummy terminal 93
are respectively provided at the ends of a group of lead-out terminals arranged on the other end side of the gate electrode line 6 (the lead-out terminal 8b side in the figure).

Although the figure is omitted from the TPT substrate 1, the fourth to sixth dummy terminals connected to each other are arranged at both ends of a group of lead-out terminals arranged on one end side of the drain electrode line 7, and in addition to the drain electrode line 7. They are provided at each end of the pullout terminal group arranged on the end side.

Figure 2 is TPT2! It is a diagram showing the configuration of an apparatus for inspecting whether there is a disconnection or short circuit in the electrode line of the plate, and a plurality of inspection terminals 12 are arranged on the top surface of the relay board 11.
Output terminal 8a of board 1.

They are arranged at the same pitch as 8b. These test terminals 12 are connected to the connectors 1 provided at both ends of the relay board 11.
It is connected to an inspection device 14 through 3a and 13b, and the inspection device 14 is configured to inspect whether there is a disconnection or a short circuit in the TFT substrate 1.

Furthermore, first to third alignment terminals 151, 152, and 153 are arranged at predetermined positions on the upper surface of the relay board 11, respectively. These alignment terminals 15+, 1
52, 1, and 53 are connected to an inspection device 14 via a switch 16, and this inspection device 14 can detect positional deviations of the TFT substrate 1 in the horizontal direction and rotational direction.

In such a configuration, when inspecting the gate electrode line 6 for disconnections and short circuits, as shown in FIG.
The I board 1 is placed on the relay board 11 via a rubber connector etc., and the lead terminals 8a and 8b provided at both ends of the gate electrode line 6 are connected to the test terminals 12 arranged on the relay board 11. Lay it on top. And the switch 16
The inspection device 14 inspects whether there is any positional deviation in the horizontal direction and rotational direction in the TPT substrate 1 by operating the .

At this time, if there is no positional deviation in the horizontal and rotational directions of the TPT substrate 1, the dummy terminals 91 of the TPT substrate 1,
9□, 93 are alignment terminals 15. on the relay board 11. ，
152 and 153, so aligning terminal 15
．． , 152, and 153 are connected to each other. Therefore, at this time, by passing current from the testing device 14 to each gate electrode line 6 through the testing terminal 12, the TPT
It is possible to check i'FW whether there is a disconnection or a short circuit in the board 1.

In addition, although the above embodiment described the disconnection/short circuit inspection of the gate electrode line 6, the fourth to sixth dummy terminals (not shown) provided on the TPT substrate 1 are connected to the alignment terminals 15115z on the relay substrate 11. , 15q, it is possible to inspect the drain electrode line 7 for disconnections and short circuits. Furthermore, the method of the present invention can be used to inspect not only TPT substrates but also striped electrodes formed on electrode substrates of simple matrix liquid crystal display devices for disconnections and short circuits. Furthermore, the present invention provides an IC
2! It can also be applied to inspection of disconnections and short circuits of boards, etc.

〔Effect of the invention〕

As explained above, in the present invention, a board on which a plurality of electrode wirings are formed at regular intervals on the surface and lead-out terminals are provided at both ends of each electrode wiring is placed on a relay board connected to an inspection device. 6. In a method for inspecting disconnections and short circuits of circuit board wiring, the lead-out terminals are connected to inspection terminals arranged on the relay board, and current is passed through each of the electrode wirings from the inspection device to inspect the presence or absence of disconnections and short circuits. , first to third dummy terminals mutually connected to the substrate are arranged at both ends of a group of lead-out terminals arranged at one end of the electrode wiring, and at ends of a group of lead-out terminals arranged at the other end of the electrode wiring. and first to third alignment terminals connected to the inspection device via a switching circuit are respectively provided at predetermined positions on the relay board, and these alignment terminals are electrically conductive. At this time, a current is passed from the inspection device to each of the electrode wirings to inspect for disconnections and short circuits.

(Thus, it is possible to easily inspect for disconnections and short circuits of the electrode wiring while accurately positioning the substrate on the medium-sized substrate, and it is possible to improve the inspection efficiency.

[Brief explanation of drawings]

1 to 3 are diagrams for explaining the method for inspecting disconnections and short circuits in board wiring according to the present invention, in which FIG. 1 is a bottom view of a TPT board, FIG. 2 is a schematic configuration diagram of a disconnection and short circuit inspection device, Fig. 3 is an explanatory diagram of the operation of the device, Fig. 4 is a sectional view showing the schematic structure of an active matrix type liquid crystal display device, and Fig. 5 is a TF
A cross-sectional view of the T-substrate, FIG. 6, is an explanatory diagram of the conventional method. DESCRIPTION OF SYMBOLS 1... TFT substrate, 4... Pixel electrode, 5... Thin film transistor, 6... Gate electrode line, 7... Drain electrode line, 8a, 8b... Output terminal, q
, +92 +93...dummy terminal, 11...
・Relay board, 12...Test terminal, 13a, 13b・
...Connector, 4...Inspection device, 51 15□ 53...Positioning terminal, 6...Switching device.

Claims (1)

[Claims] A board on which a plurality of electrode wires are formed at regular intervals on the surface and lead-out terminals are provided at both ends of each electrode wire is placed on a relay board connected to an inspection device, and each lead-out terminal is placed on the relay board. In the method for inspecting disconnections and short circuits of a board wiring, the first to third electrodes connected to each other on the board are superimposed on the arranged inspection terminals, and current is passed from the inspection device to each of the electrode wirings to inspect the presence or absence of breaks and short circuits. A third dummy terminal is provided at both ends of the pull-out terminal group arranged on one end side of the electrode wiring and at an end of the pull-out terminal group arranged on the other end side of the electrode wiring, and a third dummy terminal is provided on the relay board. First to third alignment terminals connected to the inspection device via a switching circuit are provided at predetermined positions, and when these alignment terminals are electrically connected, a signal is transmitted from the inspection device to each of the electrode wirings. 1. A method for inspecting disconnections and short circuits in board wiring, characterized by testing the presence or absence of disconnections and short circuits by passing a current.