JPH0548223A - Printed-circuit board - Google Patents

Abstract

PURPOSE:To provide a printed-circuit board which enables a size accuracy of a printed pattern for soldering parts to be evaluated easily. CONSTITUTION:Representative patterns 3a-3d for measurement for evaluating accuracy of size of circuit patterns 2a-3d and their standard dimension values 4a-4d are formed at a peripheral portion of a printed-circuit board 1 apart from general circuit patterns 2a-2d such as a pattern, etc., for soldering parts which is formed on a surface of a printed-circuit board 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board provided with a circuit mounting accuracy control means in the field of electronic device manufacturing.

[0002]

2. Description of the Related Art Conventionally, regarding the accuracy control of a circuit pattern at the manufacturing stage of a printed circuit board or the purchase acceptance stage, the size (width, length, thickness, diameter) of the pattern to be evaluated of the actual printed circuit board is evaluated. Etc.), the numerical value is compared with a dimensional numerical value that should be used as a reference and recorded on a separate document, etc. to confirm the accuracy, and the quality is judged.

[0003]

However, in the above-mentioned conventional quality control method, at the manufacturing or purchase acceptance stage, the printed circuit board actual product to be evaluated and the document or the like on which the dimensional numerical value or the like to be the standard for comparison evaluation are recorded. Must be secured at the same time. Generally, in the manufacturing and distribution process, it is difficult to ensure that the actual product and the document are attached in the form of attachment at the same time due to physical restrictions on storage and movement due to differences in each form. The actual measurement dimension value and the predetermined reference dimension value were not thoroughly evaluated and lacked in thorough evaluation, and those with insufficient accuracy flowed out to the subsequent process, which was a cause of poor mounting quality.

The present invention solves such a conventional problem, and provides a printed circuit board capable of simultaneously securing the measured value of the actual printed circuit board to be evaluated and the reference numerical value to be compared. The purpose is to do.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides one or several kinds of representative patterns for measurement, which are specified for size accuracy control, on the peripheral portion of a manufactured printed circuit board and its parts. The dimensional values are formed.

[0006]

Therefore, according to the present invention, at the time of evaluation at the manufacturing and purchase acceptance stage, the standard of the pattern to be measured and the comparison evaluation are determined from the representative pattern for measurement formed on the peripheral portion of the printed circuit board and its dimension value. This has the effect that the numerical value to be recognized can be recognized immediately.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 1 is a printed circuit board for circuit mounting,
2a, 2b, 2c and 2d are general circuit patterns for soldering and connecting components formed on the surface of the printed circuit board 1,
3a, 3b, 3c and 3d are circuit patterns 2a, 2b and 2
c, 2d is a representative pattern for measurement, which is specified for accuracy evaluation of the size, and is formed in a surplus space portion on the peripheral portion of the surface of the printed circuit board 1.
2b, 2c and 2d are manufactured by the same copper foil corrosion method as the manufacturing process. 4a, 4b, 4c and 4d are reference dimension values which are formed in the vicinity of the measurement representative patterns 3a, 3b, 3c and 3d and which represent the size (width, length, thickness, diameter, etc.) of the measurement patterns. The representative patterns 3a, 3b, 3c, 3d, etc. are formed by the same copper foil corrosion method or silk printing method.

As described above, according to the above embodiment, measurement,
On the peripheral portion of the surface of the actual product of the printed circuit board 1 to be evaluated, the representative patterns 3a to 3d specified for measurement are used.
And the size of the representative patterns 3a to 3d (width, length,
Since the reference dimension values 4a to 4d (thickness, diameter, etc.) are directly formed and written, the person in charge of evaluation recognizes the representative patterns 3a to 3d to be measured and evaluated at the manufacturing or purchase acceptance stage. This can be easily performed, and the reference dimension values 4a to 4d can be confirmed simultaneously with the dimension measurement of the actual product. Thereby, there is an effect that the comparison evaluation of the actual product measured value and the reference dimension value can be completed immediately.

[0009]

As is apparent from the above embodiments, the present invention provides one or several kinds of representative patterns for measurement specified for size accuracy control and their dimensional values on the periphery of the manufactured printed circuit board. It is formed, and at the time of evaluation at the manufacturing and purchase acceptance stage, the numerical value to be used as a standard for identification and comparison evaluation of the pattern to be measured from the representative pattern for measurement formed on the peripheral part of the printed circuit board and its dimension value. This has the effect that recognition can be performed immediately.

[Brief description of drawings]

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

[Explanation of symbols]

1 Printed circuit boards 2a, 2b, 2c, 2d General circuit patterns for soldering components 3a, 3b, 3c, 3d Measurement representative patterns 4a, 4b, 4c, 4d Measurement representative patterns specified for size accuracy evaluation Standard dimension value indicating the size of

Claims (1)

[Claims] 1. A printed circuit board on which one or several kinds of representative patterns for measurement specified for controlling the size accuracy of a circuit pattern and their dimension values are formed in the peripheral portion.