KR970005734B1 - Printed circuit board including code and method of forming code on printed circuit board - Google Patents

Abstract

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Description

How to Form Printed Wiring Board and Code

1 is a perspective view from the side of a printed wiring board according to an embodiment of the present invention.

2 is a main cross-sectional view taken along the lines S1 to S1 of FIG.

* Explanation of symbols for main parts of the drawings

1: printed wiring board 2: barcode

3: recessed part 4: bottom surface of recessed part

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board for electrical circuits comprising a code (code) such as a barcode (one-dimensional code) or a matrix code (two-dimensional code) and a method for forming a code on the printed circuit board for the electrical circuit. will be.

Conventionally, in a printed circuit board (hereinafter, referred to as a printed circuit board) for an electric circuit formed by accommodating a predetermined place inside a television receiver or a video tape recorder (VTR), the lot number, the item number, and the like are identified and managed. As a means, it is possible to print the item number consisting of alphabets and numbers on a printed wiring board, attach a nameplate, a failure tag, a process control table, or apply a label printed with a bar code to manage it by one hand. ought.

In addition, Japanese Patent Laid-Open No. 62-69377 proposes a bar made of solder coating and a space made of solder resist.

In Japanese Patent Application Laid-Open No. 61-153362, it is proposed to arrange an article identification bar code by the same means as the circuit code display.

However, in the conventional means as described above, it is necessary for the determination of the reading of the alphanumeric characters, time and cost are required, and even if they are mechanized, they are large in size and increase in investment amount. In addition, in Japanese Patent Laid-Open No. 62-68377, since a barcode is not applied to the substrate until the solder coating and the resist coating process have elapsed, the printed wiring board cannot be managed in the meantime.

Also, Japanese Unexamined Patent Application Publication No. 61-153362 has a problem that it cannot be applied to a printed wiring board which does not display a circuit code.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a printed wiring board for an electric circuit that can be identified and managed by a low cost machine, and a method for easily forming a code on the printed wiring board by eliminating the trouble of attaching a label or a failure.

In order to solve the above problems, the printed circuit board for an electric circuit of the present invention is configured to be integrally formed with the printed wiring board at the same time by means of injection molding or the like, so as to be provided integrally.

The present invention enables mechanization of signing only by slightly changing the appearance of a conventional printed circuit board for electric circuits, and prevents abrasion and peeling of sign. Moreover, the code | symbol can be comprised cheaply using the manufacturing process of a printed wiring board, eliminating the trouble of attaching a failure or a process control table.

Embodiments of the present invention will be described below with reference to the drawings shown in Figs.

FIG. 1 is a perspective view of a printed wiring board according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a cross section of a main part of FIG. 1 taken along lines S1 to S1.

The printed wiring board 1 of this invention is comprised by printing or etching a predetermined | prescribed conductor circuit (not shown), for example, copper foil, silver palladium, etc. on one side or both sides of a board | substrate. Alternatively, a rectangular recess 3 having a predetermined depth is disposed on the surface of the printed wiring board 1, and a bar code 2 is arranged on the bottom surface 4 of the recess by predetermined various forming means.

Next, various methods of forming a sign, for example, a bar code 2, on a surface or a recess of the printed wiring board 1 will be described.

Example 1

The bar code 2 is integrally formed in the concave-convex shape on the concave bottom surface 4 formed in the predetermined portion of the surface of the printed wiring board 1. In other words, when the printed wiring board 1 is molded, the barcode 2 is also formed by injection molding or press molding at the same time. In this case, in order to clearly exhibit the contrast as a barcode, a predetermined color, for example black or white, is optionally applied to the projection surface of the barcode by predetermined means.

In the bar code of the embodiment shown in FIG. 2, the bar code 2 is formed in the shape of a protrusion having a predetermined height higher than that of the concave bottom surface 4, but the bar code 2 is formed in the direction in which the concave bottom surface 4 is concave. Of course, it may be pressed. Also in this case, it is a matter of course that a predetermined color may be applied to the barcode recess or the recess bottom surface 4 as necessary. Instead of applying the color, the color of the concave bottom surface 4 and the barcode 2 may be different by the two-color molding method.

The two-color molding method is generally performed by using a mold having two cavities and two injection molding nozzles (that is, resins of two different colors), and is performed by rotating or shifting the mold.

Example 2

Barcodes are formed on the concave bottom surface 4 formed on a predetermined portion of the surface of the printed wiring board 1 made of a resin member, a green sheet, or the like by using pressing molding or stamping means.

Example 3

On the concave bottom surface 4 formed on a predetermined portion of the surface of the printed wiring board 1, a bar code is formed by printing or applying ink which is erasable by irradiation of ultraviolet rays or halogen lamps. That is, to rewrite the cord, an ink that disappears in response to light deviating from the visible light wavelength region of 400 to 800 mm is used.

As described above, the bar code 2 configured on the printed wiring board surface 1 by the means described in Examples 1 to 3 can transmit data via a non-contact type card reader (not shown).

In the above embodiment, the upper surface of the cord 2 disposed on the bottom surface 4 of the recess is configured to be lower by a predetermined amount than the surface of the printed wiring board 1.

With this configuration, even if the surface of the printed wiring board 1 is rubbed in production or conveyance and conveyance, the barcode is not erased or the label (not shown) attached to the bottom surface of the recess is not peeled off.

Further, for the purpose of abrasion resistance, scratch resistance, water resistance, and the like, a transparent resin member such as epoxy, polyimide, polyester resin, or the like may be coated on the bar code 2 without any problem. It is of course possible not to form a sign on the bottom surface of the recess of the substrate, but to form the sign directly on the surface of the substrate.

In addition, by arranging the bar code within the dimensions of the concave portion 3 determined before and after the fixed wiring of the printed wiring board, the direction and the position of the code are accommodated within a certain range, and the readability of the bar code becomes easy, and the reliability of reading is improved. .

As the input / output information of the barcode, arbitrary information such as color, size, shape lot number, part number, date of manufacture, cost, and the like may be performed.

As described above, identification management of a printed wiring board having codes formed by various means is performed by a barcode reader (not shown) to provide management data via a barcode.

The read data is collected and managed mechanically and used as production management information. The completed printed wiring board is classified and stored in an automatic warehouse or a tray at a predetermined place.

As described above, the printed circuit board for the electric circuit of the present invention can be identified by mechanically identifying a bar code (sign), whereby the management data can be effectively utilized for various purposes. Further, in the embodiment of the present invention, an example of a bar code has been described as a code placed on a printed circuit board for an electric circuit, but an arbitrary two-dimensional code such as a matrix code may be used instead of the bar code.

In addition, as a substrate object to which the code | symbol is arrange | positioned, besides the solid board | substrate or flexible board | substrate which consists of conductors, such as copper foil, the board | substrate shape | molded in three-dimensional shape, for example, the predetermined conductor circuit is arrange | positioned on the inner surface of the box frame, and the surface It may be a hybrid IC substrate (hybrid integrated circuit) including a substrate on which mounting components are mounted or a component external connection terminal (such as a COM terminal).

In addition, the member constituting the printed circuit board for an electric circuit or the like may optionally be formed by compression molding or injection molding, in addition to the resin member, a member obtained by kneading a gluten made of natural protein and a solvent.

Gluten of natural protein is easily decomposed by microorganisms in water or soil, so it is very convenient for disposal after use, and there is no worry of environmental pollution by disposal after use.

As described above, according to the configuration of the present invention, the mechanization of the coding can be performed with good productivity by using the manufacturing process of the printed wiring board. In addition, the effort of labeling can be omitted, the efficiency of identification management can be dramatically improved, and the response can be made quickly. Moreover, many effects can be acquired, such as being able to arrange | position easily a code | symbol also in the board | substrate shape | molded in three-dimensional shape.

Claims (12)

In a printed wiring board having wiring circuits formed on one or both sides of the substrate by etching or printing, the substrate is formed so as to form on the substrate a code formed integrally with the substrate by the same constituent members as the substrate. The printed wiring board, characterized in that for molding at the same time integrally. The printed wiring board according to claim 1, wherein the reference numeral is integrally formed on the surface of the substrate in an uneven shape. A method of forming a code on a printed wiring board having wiring circuits formed on one or both sides of the substrate by etching or printing, wherein the substrate is formed by the same constituent member as the substrate by means of injection molding or press molding. And forming the code on the surface of the substrate so as to form the code on the surface of the substrate, simultaneously forming the code on the printed circuit board. A method of forming a code on a printed wiring board having wiring circuits formed on one or both sides of the substrate by etching or printing, wherein the code formed integrally with the substrate is formed on the substrate by the same member as the substrate. And forming a sign at the same time as forming the substrate, and forming a sign on the printed wiring board, wherein the board and the color and the sign are different from each other by the two-color molding method. In a printed wiring board having wiring circuits formed on one or both sides of the substrate by etching or printing, when the substrate is molded so as to form a code formed integrally with the substrate on the substrate by the same constituent members as the substrate. A printed wiring board, wherein the code is integrally molded at the same time, and the code is drawn with ink which can be erased by irradiation of light having a wavelength range other than the visible wavelength range by using a printing method or a coating method. 6. The printed wiring board according to claim 5, wherein the light ray having a wavelength region other than the visible light wavelength region is ultraviolet light or light of a halogen lamp. In a printed wiring board having wiring circuits on one or both sides of the substrate by etching or printing, the substrate is formed by injection molding or compression molding of a member obtained by mixing gluten with a solvent of a natural protein. And simultaneously forming the barcode or the matrix code integrally with the substrate when forming the substrate so that a barcode or a matrix code integral with the substrate is formed on the substrate by the same constituent member as the substrate. Printed wiring board. The printed wiring board according to claim 1 or 2, wherein the code is a one-dimensional code or a two-dimensional code. The method of forming a code on a printed wiring board according to claim 3, wherein the code is a one-dimensional code or a two-dimensional code. The method of forming a code on a printed wiring board according to claim 4, wherein the code is a one-dimensional code or a two-dimensional code. The printed wiring board according to claim 5 or 6, wherein the code is a one-dimensional code or a two-dimensional code. The printed wiring board according to claim 7, wherein the code is a one-dimensional code or a two-dimensional code.