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Method for detecting skip printing of characters of circuit board

A detection method and circuit board technology, applied in the field of circuit boards, can solve the problems of missing characters on the surface of the circuit board, inconvenient use of the circuit board, etc.

Inactive Publication Date: 2013-10-30
HONGQISHENG PRECISION ELECTRONICS (QINHUANGDAO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of circuit board production, the text on the surface of the circuit board may be missing due to misoperation and other reasons.
In this way, it will cause inconvenience to the use of subsequent circuit boards.

Method used

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  • Method for detecting skip printing of characters of circuit board
  • Method for detecting skip printing of characters of circuit board
  • Method for detecting skip printing of characters of circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The method for detecting missing printed characters on a circuit board provided by the technical solution will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] A method for detecting missing printed characters on a circuit board provided in the embodiment of the technical solution includes the following steps:

[0036] For the first step, please also refer to figure 1 and figure 2 , providing the circuit board 100 to be tested.

[0037] The circuit board 100 may be a single-layer circuit board, a double-layer circuit board or a multi-layer circuit board formed with outer layers of circuits. In this embodiment, a single-layer circuit board is taken as an example for illustration. According to a predetermined design, the circuit board 100 includes a conductive layer 110 , an insulating layer 120 , a solder mask layer 130 and a text layer 140 . When the circuit board 100 is a multilayer circuit board, the conductive la...

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Abstract

The invention relates to a method for detecting skip printing of characters of a circuit board, which comprises the following steps of: (1) providing the circuit board to be detected, wherein the circuit board comprises a conducting layer and a soldermask layer which are sequentially arranged; the conducting layer comprises a first test pad, a second test pad and a connecting line communicated between the first test pad and the second test pad; and the soldermask layer is internally provided with a first through hole corresponding to the first test pad and a second through hole corresponding to the second test pad; (2) providing an electrical testing device which comprises an electrical tester, a first test probe and a second test probe; and (3) adopting the electrical testing device to detect an area corresponding to the first test pad and an area corresponding to the second test pad, and judging whether insulated masked patterns are formed on the first test pad area and the second test pad area according to electrical conduction condition detected by the first test probe and the second test probe so as to judge whether the skip printing the characters is existed on the circuit board or not.

Description

technical field [0001] The invention relates to the field of circuit boards, in particular to a method for detecting printed characters on a circuit board. Background technique [0002] Printed circuit boards have been widely used due to their advantages such as high assembly density. For the application of high-density interconnect circuit boards, please refer to the literature Takahashi, A.Ooki, N.Nagai, A.Akahoshi, H.Mukoh, A.Wajima, M.Res.Lab, High density multilayer printed circuit board for HITAC M- 880, IEEE Trans. on Components, Packaging, and Manufacturing Technology, 1992, 15(4): 418-425. [0003] After the outer conductive circuit of the circuit board is manufactured, it is necessary to print text on some positions of the solder mask layer of the outer conductive circuit to identify the circuit and electronic components in the circuit board. In the process of making the circuit board, the text on the surface of the circuit board may be missing due to reasons suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/28
Inventor 谢寒飞唐莺娟
Owner HONGQISHENG PRECISION ELECTRONICS (QINHUANGDAO) CO LTD
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