JPH0513898A - Printed circuit board - Google Patents

Abstract

PURPOSE:To form a code section for displaying many information without affecting influence to a circuit pattern of a printed circuit board. CONSTITUTION:A bar code 11 is formed on a periphery of an insulating board 1 for forming a printed circuit board by quenching with a laser light or by retaining a copper foil of an inner layer board to be readable by an optical character reader. Accordingly, it can be read by a machine and processed by a computer to increase its available range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board.

[0002]

2. Description of the Related Art FIG. 4 is a plan view showing a conventional printed wiring board. In the figure, reference numeral 1 is a printed wiring board having a circuit pattern 3 formed on the surface and an inner layer of an insulating substrate 2 made of an insulating material. Reference numeral 4 is a land formed in the circuit pattern 3, 5 is a through hole formed in the center of the land 4, and 6 is a marking portion such as a serial number.

The above-mentioned printed wiring board 1 is a copper-clad laminate in which a copper foil is laminated on the surface of an insulating substrate 2, or a multilayer copper-clad laminate in which a copper foil is laminated on the surface of an insulating substrate 2 having a circuit pattern as an inner layer. It is manufactured by forming a circuit pattern 3 by forming a resist pattern and etching on a printed circuit board made of a plate, and forming a through hole 5 by forming a hole in the land 4 and through hole plating.

The printed wiring board 1 manufactured in this manner is used for management by forming a marking portion 6 by displaying management information such as a manufacturing number with characters, symbols, etc. by means of a stamp, an engraving or the like.

[0005]

However, in such a conventional printed wiring board, since the identification portion 6 is different for each printed wiring board 1, it is necessary to form it manually, which is complicated and long. It takes time. And the reading is required by the naked eye, and cannot be read by a machine. Also, the circuit pattern 3 on the surface of the printed wiring board 1
Since it is formed by avoiding the above, there is a problem that a lot of information cannot be included.

The present invention is intended to solve the above-mentioned problems, without affecting the circuit pattern,
An object of the present invention is to obtain a printed wiring board which can easily form a code portion for displaying a lot of information, can be read by a machine and can be processed by a computer, and can be used in a wide range.

[0007]

The present invention is the following printed wiring board. (1) A printed wiring board in which a circuit pattern is formed on the surface of an insulating substrate, and a code portion composed of a bar code is formed in the peripheral portion of the insulating substrate. (2) A printed wiring board having a circuit pattern formed on the surface of an insulating substrate having an inner layer circuit, wherein a code portion composed of a bar code is formed around the inner layer board forming the insulating substrate.

[0008]

In the printed wiring board of the present invention, the code portion formed on the peripheral portion of the insulating substrate is a bar code, and is hardened by laser light after or during the manufacturing of the printed wiring board. Etc.

When the code portion is formed in the peripheral portion of the insulating substrate having the inner layer circuit, when forming the pattern of the inner layer plate, the code portion formed of the bar code is simultaneously formed in the pattern prohibited area of the peripheral portion of the inner layer plate. To do. At this time, the cord portion may be exposed on the side surface portion of the insulating substrate, but may not be exposed.

The code portion thus formed is subjected to computer processing by reading display contents by an OCR (optical character reading device). When the code portion formed in the peripheral portion of the inner layer plate is not exposed on the side surface, it can be read by X-ray projection. In these cases, the code portion can display management information such as the manufacturing number, the manufacturing date, the manufacturing conditions, etc., thereby expanding the utility value.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments of the drawings. FIG. 1 shows an embodiment, (a) is a perspective view of a printed wiring board, (b) is a front view of a cord portion, (c) is a perspective view showing a cord portion forming state, and in FIG. The same reference numerals indicate the same or corresponding parts.

Reference numeral 11 is a cord portion, which is a printed wiring board 1.
As shown in (b), the bars 12 having different widths are arranged in a line at different intervals on the peripheral portion (side surface) of the insulating substrate 2 constituting the above to form a barcode. This code part 11
Is formed by encoding arbitrary information such as a manufacturing number, a manufacturing date, manufacturing conditions, and the like.

Although the method of forming the cord portion 11 is arbitrary,
In this embodiment, a method of irradiating with laser light and quenching is adopted. In this case, after manufacturing the printed wiring board,
Alternatively, it can be performed at any point during the manufacturing process. The quenching with the laser light can be performed for each one of the printed wiring boards 1. However, as shown in (c), when a plurality of the printed wiring boards 1 are stacked, they can be simultaneously performed only by changing the irradiation position of the laser light. It is possible and advantageous.

The code portion 11 thus formed is read by OCR one by one and processed by computer.
In this case, since the code portion 11 is formed in the pattern prohibited area 13 in the peripheral portion of the printed wiring board 1, a large amount of information can be displayed, and the information can be computer processed by mechanical reading. The information read from the code section 11 can be used for quality control, process control, and any other purpose.

In the above embodiment, the code portion 11 can be easily formed by quenching with laser light, and different information can be displayed on each printed wiring board 1. Further, since the code portion 11 is formed in the pattern prohibited area 13 in the peripheral portion of the printed wiring board 1, it does not affect the circuit pattern 3.

2A and 2B show another embodiment. FIG. 2A is a perspective view of a printed wiring board, and FIG. 2B is a perspective view of an inner layer board. In the figure, 14 is an inner layer board forming the insulating substrate 2 of the printed wiring board 1, 3a and 4a are a circuit pattern and a land formed on the inner layer board 14, respectively. The bar 12 forming the bar code is formed in the pattern prohibited region 13 in the peripheral portion of the inner layer plate 14 so that the copper foil is left during the etching so that the tip reaches the side surface.

In the method for manufacturing the printed wiring board 1 described above, first, when the circuit pattern 3a and the land 4a are formed on the inner layer plate 14 made of a copper clad laminate by forming a resist pattern and etching, the resist pattern is also formed on the peripheral portion. After forming and etching, the bar 12 is formed. Then, a prepreg and a copper foil are laminated on the inner layer plate 14 on which the bar 12 is formed to form a multilayer copper clad laminate, and a resist pattern is further formed and etching is performed to form the circuit pattern 3
And the land 4 is formed. After that, perforation and through hole plating are performed so as to penetrate the lands 4 and 4a to form through holes 5, and the printed wiring board 1 is manufactured.

The printed wiring board 1 obtained as described above is
Since the bar 12 is exposed on the side surface to form the cord portion 11, the bar 12 is read by the OCR and processed by a computer as in the case of FIG. The bar 12 forming the code portion 11 of this embodiment can be manufactured simultaneously because it can be formed at the same time when the circuit pattern 3a of the inner layer plate 14 is formed. By forming and stacking the bars 12 on the plurality of inner layer plates 14, accurate reading by OCR can be performed.

3A and 3B show another embodiment. FIG. 3A is a plan view of a printed wiring board, and FIG. 3B is a plan view of an inner layer board.
This embodiment has substantially the same structure as that of FIG. 2, except that the bar 12 is formed in the pattern prohibited area 13 in the peripheral portion of the inner layer plate 14.
The tip portion is formed so as not to reach the side surface and stacked, and the cord portion 11 thus formed is formed on the side surface portion of the printed wiring board 1 so that the tip portion is not exposed.

The printed wiring board 1 described above is manufactured in substantially the same manner as that shown in FIG. 2, but since the code portion 11 is not exposed, it can be read by OCR by fluoroscopy. In this embodiment, since the cord portion 11 is not exposed to the outside, there is no risk of damage due to corrosion or the like, and long-term use is possible.

In the above embodiment, the code section 11
The means for forming is not limited and can be changed. Further, the number of stacked printed wiring boards 1 is not limited.

[0022]

According to the present invention, since the code portion composed of the bar code is formed in the peripheral portion of the insulating substrate constituting the printed wiring board, the circuit pattern is not affected.
A code portion for displaying a lot of information can be easily formed, and further, it can be read by a machine and processed by a computer, which has the effect of expanding the range of use. In addition to the above effects, by forming a code part composed of a bar code on the periphery of the inner layer plate forming the insulating substrate, the code part can be formed simultaneously with the circuit pattern during the manufacturing process of the printed wiring board. This has the effect of facilitating manufacturing and facilitating manufacturing.

[Brief description of drawings]

1A and 1B show an embodiment, FIG. 1A is a perspective view of a printed wiring board, FIG. 1B is a front view of a cord portion, and FIG. 1C is a perspective view showing a cord portion forming state.

FIG. 2 shows another embodiment, (a) is a perspective view of a printed wiring board, and (b) is a perspective view of an inner layer board.

3A and 3B show another embodiment, FIG. 3A is a plan view of a printed wiring board, and FIG. 3B is a plan view of an inner layer board.

FIG. 4 is a plan view of a conventional printed wiring board.

[Explanation of symbols]

1 printed wiring board 2 insulating substrate 3,3a circuit pattern 4, 4a land 5 through holes 11 Code part 12 bars 13 pattern prohibited area 14 Inner layer board

Claims (2)

[Claims] 1. A printed wiring board having a circuit pattern formed on the surface of an insulating substrate, wherein a code portion composed of a bar code is formed in the peripheral portion of the insulating substrate. 2. A printed wiring board having a circuit pattern formed on the surface of an insulating substrate having an inner layer circuit, wherein a code portion composed of a bar code is formed in the peripheral portion of the inner layer plate forming the insulating substrate. Printed wiring board.