JPH04335169A - Conduction inspecting method of printed wiring board - Google Patents

Abstract

PURPOSE:To discriminate whether wiring of an inferior net is possible by preparing a discrimination mark of the net in addition to conducting point information for determining a conducting part of every net as conducting inspection data. CONSTITUTION:A printed board and conducting inspection data are input and the conducting inspection of a conducting point of each net is performed by the use of a conducting inspection processing part. At first, '10' and '1' are given to each net as discrimination marks in conduction inspecting data to be used. '10' is defined as the disapproval of wiring in the net of clock wiring and the like and '1' as the impossibility of the wiring in a normal wiring net. The existence of disconnection and shorts caused by manufacture inferiority is discriminated by the use of the conduction inspecting/processing part. In the case where there is a manufacture inferiority, the net in which the discrimination mark '10' is defined exists and a printed board is remade without performing the following steps. The discrimination mark represents a net which can be wired, and the following steps are performed in order to produce a product.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for testing continuity of printed wiring boards, and more particularly to improving data for testing continuity.

0002

2. Description of the Related Art As shown in FIG. 3, a conventional continuity testing method for a printed wiring board includes continuity testing data 6 for a printed wiring board 1 to be tested for continuity, a continuity testing processing section 3, and wiring instructions for locations of disconnections due to manufacturing defects. Wiring modification instruction processing unit 7;
It consists of a delivery processing section 4 and a wiring modification processing section 5.

As shown in FIG. 4, the continuity test data 6 defines only the continuity points for each net (NET).

Next, the operation will be explained. Input the printed wiring board 1 to be tested for continuity and the continuity test data 6,
The continuity test processing section 3 performs a continuity test on the continuity points of each net. As a result, if a disconnection due to a manufacturing defect is discovered, the wiring modification instruction processing unit 7 instructs the wiring location in order to handle it by modifying the wiring and apply it as a product.

[0005] The printed wiring board delivered via the delivery processing section 4 is subjected to wiring processing in the wiring modification processing section 5 and is applied as a product.

In this conventional printed wiring board continuity testing method, the type of net in which a disconnection has occurred due to a manufacturing defect cannot be determined in the continuity testing processing unit 3 in the first process, and the wiring modification processing unit 5 in the final process For printed wiring boards that include nets that cannot be modified by wiring, there is a problem in that all of the processes up to now are wasted.

[0007]

[Object of the Invention] Therefore, the present invention has been made to eliminate the drawbacks of the conventional ones, and its purpose is to identify whether or not a defective net can be wired during a continuity test. An object of the present invention is to provide a continuity testing method for a printed wiring board.

[0008]

[Structure of the Invention] According to the present invention, the continuity test data of a printed wiring board includes, in addition to continuity point information that determines the continuity point of each net, an identification mark indicating whether or not the net can be wired. , a continuity testing method for a printed circuit board is obtained, which is characterized in that a continuity test is performed using this continuity testing data.

[0009]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a processing diagram showing one embodiment of the present invention, and FIG. 2 is an example of the contents of continuity test data used in the present invention.

The continuity testing method for printed wiring boards of the present invention is comprised of a continuity testing processing section 3, a delivery processing section 4, a wiring modification instruction section 7, and a wiring modification processing section 5.

"10" and "1" are given to each net as identification marks added to the continuity test data 2 used for this purpose. "10" indicates a net such as a clock wiring, which cannot be wired, and "1" indicates a normal wiring net, which is defined as a net that can be wired.

The continuity test processing unit 3 inputs the printed wiring board 1 to be tested for continuity and the continuity test data 2 corresponding thereto, performs a continuity test, and determines whether or not there is a disconnection or short circuit due to a manufacturing defect. If there is a manufacturing defect, it is determined whether the net is incompatible with wiring based on the identification marks "10" and "1" defined in the continuity test data 2.

[0014] At this time, if there is a net for which the identification mark "10" is defined, it is determined that the product is defective at this point, and
The printed wiring board is remade without post-processing.

[0015] Also, since it is possible to handle the wiring if only the net has only the identification mark "1" defined, the wiring modification instruction section 7, the delivery processing section 4, and the wiring modification processing section in the subsequent process 5 and apply it as a product.

[0016]

Effects of the Invention As explained above, according to the present invention, by adding the identification mark of each net in addition to the continuity point of each net in the continuity test data, it is possible to detect defective nets during the continuity test. You can decide whether it is possible. Therefore, it is possible to decide on the spot whether or not to carry out subsequent processing, which has the effect of eliminating the need for wasteful steps.

[Brief explanation of drawings]

FIG. 1 is a flow diagram showing processing in an embodiment of the present invention.

FIG. 2 is a diagram showing an example of continuity test data used in the embodiment of the present invention.

FIG. 3 is a process flow diagram showing a conventional continuity testing method for a printed wiring board.

FIG. 4 is a diagram showing an example of continuity test data used in the conventional method.

[Explanation of symbols]

1 Printed wiring board to be tested for continuity 2, 6 Continuity test data 3 Continuity test processing section 4 Delivery processing department 5 Wiring modification processing department 7 Wiring modification instruction processing section

Claims (1)

[Claims] [Claim 1] Continuity test data for a printed wiring board includes continuity point information that determines the continuity point for each net, as well as an identification mark that indicates whether or not the net can be wired. A continuity testing method for printed circuit boards that is characterized by conducting a continuity test.