JPH04303988A - Printed wiring board - Google Patents

Abstract

PURPOSE:To easily confirm a parts omission after mounting by making the color of the printing ink of symbols for clearly indicating the parts numbers and parts positions of automatically mounted parts different from the color of the printing ink of symbols clearly indicating the parts numbers and parts positions of parts which are not mounted automatically. CONSTITUTION:After through holes 2 are formed through a substrate 1, marks, such as symbols 4, pin numbers 5, parts numbers 6 of automatically mounted parts, parts numbers 7 of parts which are not mounted automatically, etc., are printed on the substrate 1. The color of the printing ink of the marks including symbols clearly indicating the parts numbers 6 and parts positions of automatically mounted parts is made different from the color of the printing ink of marks including the parts numbers 7 and parts positions of parts which are not mounted automatically. Therefore, whether the parts to be mounted on the substrate 1 are to be mounted automatically or not can be clearly discriminated and a parts omission can easily be confirmed after mounting.

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, and more particularly to a printed wiring board on which markings are printed on the substrate.

0002

2. Description of the Related Art FIG. 3 is a perspective view of essential parts of an example of a conventional printed wiring board.

As shown in FIG. 3, a conventional printed wiring board has a symbol 4 and a pin number 5 to clearly indicate the parts to be attached to the through holes 2 and pads 3 formed on the substrate 1.
, part number 6 for parts to be automatically mounted, and part number 7 for parts not to be automatically mounted.

[0004] Conventionally, all of these signs such as numbers and symbols were printed with ink of the same color.

[0005]

[Problem to be solved by the invention] In recent years, printed wiring boards have been
With the increase in the number of surface-mounted components, the number of printed signs on boards has become denser, and part numbers, symbols, etc. are placed close to each other, and part numbers are often omitted when there is no space. Furthermore, in component mounting, the number of automatically mounted components increases, and it is not easy to check whether there are any missing components after the automatic mounting is completed.

[0006] In conventional printed wiring boards, all markings are printed using ink of the same color, so it is difficult to determine whether a missing component after component mounting is a component that should be automatically mounted, or whether it is a component that cannot be automatically mounted. It is difficult to determine whether In particular, in component mounting, after parts are mounted automatically, parts that are not automatically mounted are mounted manually, and then parts that are not automatically mounted are mounted manually, so parts that are automatically mounted are missing after the automatic mounting is completed. The disadvantage is that it is difficult to test for the presence or absence of

[0007] An object of the present invention is to provide printed wiring that can clearly determine whether a component to be mounted on a board is automatically mounted or not automatically mounted, and that allows easy confirmation of missing components after mounting. The purpose is to provide a board.

[0008]

[Means for Solving the Problems] The present invention provides a printing ink color for markings including a symbol indicating the part number and part position of parts to be automatically mounted in a printed wiring board in which markings are printed on a board. It is characterized by using different colors of printing ink for the sign including the part number of the part not to be used and a symbol indicating the part position.

[0009]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the main parts of a printed wiring board according to one embodiment of the present invention, and FIG. 2 is a perspective view of the main parts of another embodiment of the invention.

As shown in FIG. 1, a through hole 2 is formed on the board 1, and in order to clearly indicate the component to be attached to the pad 3, there is a symbol 4, a pin number 5, a part number 6 for the component to be automatically mounted, and a symbol 4 for indicating the component to be attached to the pad 3. A sign such as part number 7 is printed on the part that does not fit. The color of the printing ink for part number 6 of the part to be automatically mounted is different from the color of the printing ink for part number 7 of the part not to be automatically mounted.

Further, the symbol 4 for clearly indicating the part position may be different from the printing ink color of the corresponding part numbers 6 and 7, but the purpose of the present invention will be made clearer if the symbol 4 is the same color. can. However, for parts that do not have a part number, the color of the printing ink of symbol 4 that clearly indicates the part position will be different for parts that are automatically mounted and parts that are not automatically mounted, and for parts that have a part number, It is necessary to color code the same way as printing ink colors. This is, for example,
This can be achieved by using yellow printing ink for the part number 6 of the part to be automatically mounted or the symbol 4 indicating the part position, and by using white printing ink for the part number 7 or the symbol 4 indicating the part position of the part not to be automatically mounted.

[0013] The color of printing ink for symbols 4, pin numbers 5, and part numbers for identifying printed wiring boards that are not used to clearly indicate component positions is the part number 6 for automatically mounted parts or the part number 6 for parts that are not automatically mounted. It may be the same color as number 7, or may be different as in the other embodiment shown in FIG.

[0014]

Effects of the Invention As explained above, according to the present invention, the printing ink color of the symbol that clearly indicates the part number or part position of the part to be automatically mounted and the symbol that clearly shows the part number or part position of the part that is not automatically mounted. By using different colors of printing ink, it is possible to clearly determine whether parts to be mounted on a board are automatically mounted parts or parts that are not automatically mounted, and it is also possible to easily check for missing parts after mounting. effective.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of an embodiment of the present invention.

FIG. 2 is a perspective view of essential parts of another embodiment of the present invention.

FIG. 3 is a perspective view of essential parts of an example of a conventional printed wiring board.

[Explanation of symbols]

1　　　　Substrate 2 Through hole 3 Pad 4 Symbol 5 Pin number

Claims (1)

[Claims] Claim 1: In a printed wiring board on which markings are printed on a board, the color of the printing ink for markings that includes symbols that clearly indicate the part numbers and parts positions of parts to be automatically mounted, and the part numbers and parts positions of parts that are not automatically mounted. 1. A printed wiring board characterized in that the color of printing ink of a sign including a symbol clearly indicating the same is different.