JPH06139381A - Method for forming bar code - Google Patents

Abstract

PURPOSE:To decrease the cost and to prevent erroneous reading by forming a space section and a bar section while removing the only silk ink on a resist member by engraving with the laser. CONSTITUTION:A bar code is formed directly on a printed board instead of applying bar code paper on an ECU substrate. Resist members 2 and 3 are applied on both surfaces of the substrate 1 and silk ink 4 is printed on one-side surface 2. A bar code A is formed by engraving with laser 7 on the surface. Thus, a bar section 5 consisting of a white space section 6 and a green resist member 2 is formed by removing the silk ink 4 by the laser 7. Thus, the bar code can be read by a reader after washing and its production cost can be reduced compared with the seal method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a bar code attached to a product.

[0002]

2. Description of the Related Art The conventional bar code shown in FIG. 1A is formed by the following method.

(1) In the sticker method, a serial number is printed on the surface of the sticker, and the sticker is attached to the base by hand or by an automatic machine.

(2) By a marking method, as shown in FIG. 4, an ink 12 (hereinafter referred to as a seal) made of a phenol resin is printed on one surface of a substrate 11, and a laser 13 is applied to a part of this surface for a long time. Then, the ink in that portion is removed, and the substrate is carbonized to form.

The bar code A formed by the above methods (1) and (2) is read when the light from the reader is reflected from the space portion 12 during use and the reader absorbs the light. .

[0006]

However, the bar code has the following problems.

(1) The seal system is mainly made of polyimide, and the cost of the seal 12 is high, and the cost of the bar code is increased accordingly.

(2) In the marking method, since the bar portion 14 is formed by carbonizing a part of the substrate, the bar portion 14 diffusely reflects the light from the reader, and the original function of the bar portion 14 is maintained. It will not be sufficiently fulfilled, and reading mistakes will easily occur.

SUMMARY OF THE INVENTION The present invention has a technical object to provide a method of forming a bar code which is inexpensive and does not cause a reading error.

[0010]

[Means for Solving the Problems] The technical means for solving the problems are as follows.

A resist material is applied to both surfaces of the substrate, silk ink is printed on the resist material on one side surface, the surface is marked with a laser, only the silk ink is removed, and the surface is silk ink. A method of forming a bar code is characterized in that the formed space portion and the bar portion whose surface is made of a resist material are formed.

[0012]

[Function] In the bar code created by the above method, the bar portion is resist (green) and the space portion is silk ink (white)
With this contrast of white and green, it can be decoded as a bar code, and no reading error occurs.

[0013]

EXAMPLES Examples will be described below.

FIG. 2 is an explanatory view of this embodiment, and its plan view is shown in FIG.

In FIG. 2, A is a bar code, 1 is a substrate, 2 is a resist material on the front surface, 3 is a resist material on the back surface,
The colors are all green. 4 is white silk ink 5
Is a bar portion, 6 is a space portion, and 7 is a laser for melting silk ink.

This embodiment is a method of directly forming a bar code on a printed circuit board instead of sticking a bar code paper on an ECU board. As a forming method thereof, resist materials 2 and 3 are applied to both surfaces of the board 1, The silk ink 4 is printed on the surface 2 on one side, and the surface is marked with a laser 7 to form a barcode A.

By removing the silk ink 4 with the laser 7, the bar portion 5 composed of the white space portion 6 and the green resist material 2 is formed.

FIG. 3 shows an apparatus according to the forming method of the present embodiment, in which an input / output material device and a CPU act as a control CPU to generate XY.
The laser beam is adjusted by operating the axis-deflecting mirror.

As a method of forming a bar code, a resist material is applied on a substrate, silk ink is printed on the substrate, and the substrate is held under the lens shown in FIG. The silk ink is melted to sequentially form bar codes.

[0020]

The bar code formed by the method of the present invention can be sufficiently read by a reader even if it is washed with water, and the manufacturing cost is greatly reduced as compared with the sealing method. To do.

[Brief description of drawings]

FIG. 1 is a plan view of a barcode.

FIG. 2 is a cross-sectional view of a barcode formed by the method of this embodiment.

FIG. 3 is a schematic diagram of a barcode forming device.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Substrate 2 Resist Material 3 Resist Material 4 Silk Ink 5 Bar Area 6 Space Area 7 Laser A Bar Code

Claims (1)

[Claims] 1. A resist material on both sides of a substrate is applied, silk ink is printed on the resist material on one surface, and the surface is engraved with a laser to remove only the silk ink and the surface is silk ink. And a space part composed of
A method of forming a bar code, characterized in that a bar portion having a surface made of a resist material is formed.