JPH04112595A - Discriminating method of printed wiring board - Google Patents

Abstract

PURPOSE:To decrease processes, in which discriminating sections are mounted, and to reduce cost and a read time by simultaneously setting up the discriminating sections by a plurality of holes arranged in a matrix shape when the holes such as a through-hole are bored. CONSTITUTION:Holes at ten positions are bored to the end section of a printed wiring board at regular intervals in a row and positions are set as a discriminating section, and information for discrimination is written by the presence of the holes. Numeric values are shown by a binary notation as information for discrimination, and the figures of 1 and 0 are replaced by the presence of the holes, thus obtaining 1024 kinds of symbols. Accordingly, the discriminating sections of products by plurality of the holes disposed in a matrix shape are fitted simultaneously when the holes such as through-holes are bored, thus eliminating the need for the preparation of processes for mounting the discriminating sections, then reducing cost and a read time.

Description

[Detailed description of the invention] Industrial applications be.

Conventional technology In recent years, production automation and high-mix low-volume production of electronic components have progressed significantly, and there is an increasing need to assign product numbers, lot numbers, serial numbers within lofts, etc. to printed wiring boards for production control purposes. Ta.

The conventional method of assigning and identifying lot numbers, etc. will be explained below.

FIGS. 3 and 4 show conventional identification methods.

Figure 3 shows an example using the barcode identification method.
1 is a printed wiring board, and 11 is an identification section using a bar code. This involves converting information such as lot numbers and serial numbers within a lot into barcodes, attaching a sticker with the barcode printed to a predetermined position such as the edge of a printed wiring board, and then placing a transparent resin on top and hardening it. It is formed by this.

Further, FIG. 4 shows an example using the character identification method, where 1 is a printed wiring board and 12 is a character identification section. This is formed by replacing the necessary information with alphanumeric characters and leaving the numbers as they are by writing or stamping them in a predetermined position with UV-curing or thermosetting ink, and then curing the ink.

Problems to be Solved by the Invention However, the above method has the problem of increasing the number of manufacturing steps, leading to longer lead times and higher costs.

The present invention solves the above-mentioned conventional problems, and aims to provide a printed wiring board identification method in which an identification section can be provided without increasing the number of man-hours.

Means for Solving the Problems In order to achieve this object, the printed wiring board identification method of the present invention uses a method for identifying a product using a plurality of holes arranged in a matrix when drilling holes such as through holes. We are taking a method of providing both at the same time.

Effect: According to this method, the step of providing the identification portion is included in the step of drilling holes, so there is no need to create the step of providing the identification portion independently, and there is no need to prepare any particular materials. Therefore, material costs, labor costs, and lead time can be reduced.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows an identification part of a printed wiring board in one embodiment of the present invention. In FIG. 1, 1 is a printed wiring board, 2 is a wiring pattern, 3 is a through hole provided in a land portion, and 4 is an identification portion provided within the printed wiring board 1. Note that the black circles in the figure indicate holes. FIG. 2 shows the configuration of a hole processing machine for printed wiring boards, where 5 is the main body of the hole processing machine and 6 is an information input section for hole processing.

Examples will be described in detail below.

The identification portion of the printed wiring board according to the present invention is composed of a plurality of holes arranged in a matrix. In Figure 1, as an identification section, ten hole positions are set at equal intervals in a row at the end of a printed wiring board, and information for identification is written based on the presence or absence of holes at each hole position. It is composed of

Identification information is often numerical values such as lot numbers and serial numbers within a lot, so numerical values are expressed in binary notation and 1
It can be a combination of the numbers O and O.

If the numbers 1 and O are replaced depending on the presence or absence of a hole, in the case of the configuration of the identification section as described above, numbers from O to 1023 can be expressed in decimal notation. In the example given in Figure 1,
It will look like this:

"...ζ:...X"JGo21C1・gu,]1・ni)1
101000101=>833" Next, we will explain how to form this identification part. For drilling holes such as through holes, a numerically controlled drilling machine is usually used. The drilling machine collects various information as shown in Figure 2. Consists of input section and processing machine body.

Information can be entered using paper tapes, magnetic disks, etc., or using a fixed key fob. Control is performed by a microcomputer. To implement this method, software for forming the identification section is installed in the control section, and information on the identification section and information on the position where the identification section is to be formed are inputted from a magnetic disk or a keyboard.

As described above, according to this embodiment, the numerical value for identifying a printed wiring board is expressed by the presence or absence of a hole, and the holes in the identification part are processed by incorporating software into the hole processing machine. The identification section can be provided by simply increasing the information input to the hole processing machine during hole processing, and there is no need to create a separate process for providing the identification section.

In the embodiment, the presence or absence of holes at 10 locations was replaced with binary values of 1 and 0, but this may simply be considered as 1024 symbols. Further, in the embodiment, the identification part is made to have 10 holes in one column or not, but it may be made into an mxn matrix.

Effects of the Invention As described above, the present invention simplifies the process of providing the identification portion by simultaneously providing the identification portion of the product using a plurality of holes arranged in a matrix when drilling holes such as through holes. This makes it possible to realize an excellent method for identifying printed wiring boards, which eliminates the need to manufacture them separately and reduces costs and lead time.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a printed wiring board identification method in an embodiment of the present invention, FIG. 2 is a schematic diagram of a hole drilling machine, and FIG.
4 are plan views showing a conventional printed wiring board identification method. 1...Printed wiring board, 3...Through hole, 4...Identification section.

Claims (1)

[Claims] A printed wiring board identification method that simultaneously provides a product identification part such as a lot number using a plurality of holes arranged in a matrix when drilling component insertion holes, through holes, or via holes in a printed wiring board.