JPH04111779U - Printed circuit board with carbon test pattern - Google Patents

Abstract

(57) [Summary] [Purpose] Even after the waste substrate 2 is removed, the resistance value of the carbon pattern can be checked using the carbon test pattern 1. [Structure] A carbon test pattern 1 is provided on a printed circuit board body 3 excluding a disposable board 2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a printed circuit board with a carbon test pattern. Ru.

0002

[Conventional technology]

Generally, the resistance value of carbon patterns is checked as printed circuit boards for VTRs, etc. A carbon test pattern is known. Conventionally, this carbon test pattern is printed on a printed base, as shown by reference numeral 1 in Figure 5. It was provided on the discarded board 2 of the board. In FIG. 5, 3 is the printed circuit board body, 4a , 4b indicates a copper foil test land.

0003

[Problem that the idea aims to solve]

By the way, like the printed circuit board mentioned above, a carbon test pattern is placed on the disposable board 2. If Zone 1 is installed, the manufacturer of the printed circuit board and the person using the printed circuit board will Although the above resistance value can be checked at the parts receiving department on the receiving side, When assembling into a product, the above-mentioned disposable board 2 is removed, so the assembly department and In the service department, the above-mentioned resistance value is checked using carbon test pattern 1. The drawback was that it couldn't be done.

0004 For this reason, the resistance value of the carbon pattern is checked in the assembly department and service department. To check, as shown in FIG. Peel off the resist on the copper foil patterns 6a and 6b at both ends of the carbon pattern 5. The exposed parts of the copper foil patterns 6a and 6b are shown as 7a and 7b). had to be used instead of the copper foil test lands 4a and 4b shown in FIG. .

[0005] When the resist is removed as described above, the copper foil patterns 6a and 6b are accidentally removed. There was a risk of cutting the copper foil pattern or damaging other adjacent copper foil patterns. This idea is intended to solve the above problems, and is suitable for assembly lines and service In the carbon pattern resistance department, the resistance value of the carbon pattern is within the design specifications and standards. This makes it possible to easily and safely check whether the

[0006]

[Means to solve the problem]

In order to solve the above problems, the present invention discards the carbon test pattern 1 and uses a substrate instead of the carbon test pattern 1. 2, but is provided on the printed circuit board body 3.

[0007]

[Effect]

In the printed circuit board having the carbon test pattern 1 configured as described above, , Even after the waste substrate 2 is removed, the carbon test pattern 1 shows the carbon pattern. You can check the resistance value of the turn.

[0008]

【Example】

An embodiment of this invention will be described below with reference to the drawings. Figure 1 shows a printed circuit board consisting of a printed circuit board body 3 and a disposable board 2. A carbon test pattern 1 is provided on the substrate body 3. 4a, 4b indicates the copper foil test lands connected to both ends of carbon test pattern 1. 8 indicates a copper foil pattern.

[0009] With such a printed circuit board, even after the waste board 2 is removed, the carbon test The resistance value of the carbon pattern can be checked using the carbon pattern 1. In the above embodiment, the copper foil pattern 8 and the carbon test pattern 1 are connected to the printed circuit board. Although we have explained the case where they are printed on the same side of the main body 3, as shown in Figures 2 to 4, A carbon test pattern 1 is placed on one side 9 of the board body 3, and a copper foil pattern is placed on the other side 10. Carbon test pattern 1 and other The copper foil test lands 4a, 4b provided on one side 10 of the silver through-holes 11a, 11 By connecting at b, the same effect as that in FIG. 1 can be obtained.

0010 In addition, in the above embodiment, the disposable board 2 is provided as a printed circuit board. Although described above, it can be implemented even when the disposable substrate 2 is not provided.

[0011]

[Effect of the idea]

This idea is as described above, and the carbon resistance value is determined by the printed circuit board manufacturer and the printer. This is confirmed not only in the parts receiving department where printed circuit boards are used, but also on the product assembly line. This not only prevents defective products from being shipped, but also helps the service department This makes it possible to quickly discover problems at the gate.

[Brief explanation of drawings]

FIG. 1 is a plan view of a printed circuit board showing an embodiment of this invention.

FIG. 2 is a plan view of a printed circuit board showing another embodiment of the invention.

FIG. 3 is a rear view of a printed circuit board showing another embodiment of the invention.

FIG. 4 is an enlarged longitudinal sectional front view of a printed circuit board showing another embodiment of the invention.

FIG. 5 is a plan view of a conventional printed circuit board.

FIG. 6 is a perspective view of a conventional printed circuit board.

[Explanation of symbols]

1 Carbon test pattern 2 Discarded board 3 Printed circuit board body

Claims (1)

[Scope of utility model registration request] 1. A printed circuit board characterized in that a carbon test pattern is provided on the printed circuit board body excluding the disposable board.