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Circuit board four-wire test system and test method

A technology of testing system and testing method, which is applied in the direction of electronic circuit testing, printed circuit testing, electrical measurement, etc., and can solve the problems of testing PTH hole resistance, unable to set test needles, etc.

Pending Publication Date: 2021-02-02
KINWONG ELECTRONIC TECH (ZHUHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the width of the annular ring of the PTH hole is too small, for example, the annular ring is less than 0.12mm, the test needle cannot be set on the annular ring, resulting in the inability to use the four-wire test method to test the resistance of the PTH hole

Method used

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  • Circuit board four-wire test system and test method
  • Circuit board four-wire test system and test method
  • Circuit board four-wire test system and test method

Examples

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, that is, embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] It should be noted that when a component is referred to as being “fixed on” or “disposed on” another component, it may be directly or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are for convenience of description only, rather than indicating or implying the referred device ...

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PUM

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Abstract

The invention is applicable to the technical field of circuit board testing, and provides a circuit board four-wire testing system. The system comprises a circuit board and a four-wire testing module;a first through hole is formed in the circuit board, and a first hole ring and a second hole ring are arranged at the two ends of the first through hole respectively; a first test bonding pad and a second test bonding pad are respectively arranged on two sides of the circuit board, the first test bonding pad is conducted with the first hole ring, and the second test bonding pad is conducted withthe second hole ring; the four-wire test module comprises two first test pins and two second test pins, the two first test pins are connected with the first hole ring and the second hole ring respectively and used for testing the voltage of the first through hole, and the two second test pins are connected with the first test bonding pad and the second test bonding pad respectively and used for applying constant current to the first through hole. The circuit board four-wire test system can accurately test the resistance of the through holes in the circuit board. The invention also provides a circuit board four-wire test method.

Description

technical field [0001] The invention relates to the technical field of circuit board testing, in particular to a circuit board four-wire testing system and a testing method. Background technique [0002] In the manufacturing process of the PCB board, it is usually necessary to detect the resistance value of the plating through hole (PTH hole) to check whether the PTH hole has problems such as too thin copper or no copper in the hole. In the prior art, a four-wire test method is usually used for detection, and the four-wire test method needs to arrange test needles around the PTH hole. However, when the width of the annular ring of the PTH hole is too small, for example, the annular ring is less than 0.12 mm, the test needle cannot be set on the annular ring, so that the resistance of the PTH hole cannot be tested by the four-wire test method. Contents of the invention [0003] The present application provides a circuit board four-wire testing system and testing method, wh...

Claims

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Application Information

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IPC IPC(8): G01R31/28
CPCG01R31/2808G01R31/2813
Inventor 邹亚洪张婕辛涛罗斌肖火亮刘自荣王俊
Owner KINWONG ELECTRONIC TECH (ZHUHAI) CO LTD
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