JPH0194692A - Manufacture of printed wiring board - Google Patents

Abstract

PURPOSE:To prevent reverse printing and to facilitate product name identification at the time of screen printing by forming product name characters using resist films and marking characters, while overlapping on such product name characters formed on an insulating board, which is copper-clad by etching, at the time of screen printing. CONSTITUTION:While forming a circuit by etching a copper-clad insulating substrate 11, first product name characters 1 is formed. Then a resist film 12, on which second product name characters 2 identical with said first product name characters 1 are arranged both in form and position, is screen printed on the insulating substrate 11. Further, third product name characters 3, identical with the first product name characters 1 both in form and position, are screen printed on said resist film 12 together with marking characters 15. According to the constitution, any reverse printing or wrong product name can smoothly be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a printed wiring board, and particularly to a method of screen printing for forming a resist film and marking characters.

[Conventional technology]

Conventionally, in the manufacturing method of this type of printed wiring board, the positioning of the screen printing used in the process of forming the resist film and marking characters requires a positioning plate provided outside the part of the printed wiring board that will become the product. pilot was used.

[Problem that the invention seeks to solve]

In the conventional printed wiring board manufacturing method described above, an alignment pilot provided on the outside of the part of the printed wiring board that will become the product is used as a positioning method during screen printing. Figure 2, which is easy to mistake (
For printed wiring boards with a rotationally symmetrical external shape, such as printed wiring board 8 shown in a), and printed wiring boards with similar external shapes, such as printed wiring boards 9 and 10 shown in FIG. No consideration is taken, and apart from the pilot for positioning, it relies only on the appearance of the product, which has the disadvantage that it often gets printed backwards during screen printing, and product names get confused.

In addition, in FIG. 2, 4 indicates a cut, and 5 to 7 indicate character product names printed on the printed wiring board.

In contrast to the conventional printed wiring board manufacturing method described above, the present invention provides simultaneous screen printing of individual product name characters within the product, which is visually more effective in preventing reverse printing during screen printing and identifying the product name. The difference is that it is facilitated by

[Means for solving problems]

The method of manufacturing a printed wiring board of the present invention includes an etching step of forming a circuit on a copper-clad insulating board by etching and simultaneously forming a first product name letter, and a second etching step of forming a first product name letter at the same location as the first product name letter. a resist step of screen printing a resist film provided with product name letters on the insulating plate;
At the same time as marking characters on the resist film, the first
and a marking step of screen printing a third product name character having the same shape and location as the product name character.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is an exploded perspective view of a printed wiring board manufactured according to an embodiment of the present invention. Product name letters 1 are formed on the copper-clad insulating plate 11 by etching at the same time as the circuit 14. Resist coating JIK1 screen printed on the insulating plate 11
2, so that the product name character 2 is also formed by punching holes. Further, product name characters 3 are formed on the screen printing 13 on the resist film 12 at the same time as the marking characters 15 .

However, these product name characters 1, 2, and 3 should all have the same shape and be formed at the same location.

〔Effect of the invention〕

As explained above, the present invention is capable of forming product name letters at the same location using a resist film and marking letters, overlapping the product name letters formed on a copper-clad insulating plate by etching during screen printing. This has the effect of quickly detecting reverse printing during screen printing or a difference in product name.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a printed wiring board produced according to an embodiment of the present invention, FIG. 2 is a plan view of an example of a printed wiring board that is effective according to the present invention, and FIG. FIG. 2(b) is a plan view of an example of a printed wiring board with a rotationally symmetrical outer shape that is effective in preventing reverse printing. FIG. 2(b) is a plan view of an example of a printed wiring board with a similar outer shape. 1-3, 5-7...Text product name, 4...■Cut, 8
~10...Printed wiring board, 11...Insulating board, 12...
・Resist film, 14...Circuit, 15...Marking characters.

Claims (1)

[Claims] An etching step of forming a circuit on a copper-clad insulating plate by etching and simultaneously forming a first product name letter, and insulating the resist film with a second product name letter having the same shape and the same location as the first product name letter. It is characterized by comprising a resist step of screen printing on the board, and a marking step of screen printing a third product name character having the same shape and same location as the first product name character simultaneously with the marking character on the resist film. A method for manufacturing printed wiring boards.