{"id":2314,"date":"2025-11-09T17:00:42","date_gmt":"2025-11-09T09:00:42","guid":{"rendered":"https:\/\/www.jingpengpcb.com\/?p=2314"},"modified":"2026-10-02T19:38:14","modified_gmt":"2026-10-02T11:38:14","slug":"electrical-testing","status":"publish","type":"post","link":"https:\/\/www.jingpengpcb.com\/en\/blog\/electrical-testing\/","title":{"rendered":"Electrical Testing"},"content":{"rendered":"

Electrical testing is an indispensable part of the PCB manufacturing process, helping to identify and resolve electrical issues on circuit boards.<\/p>\n

\"Flying<\/p>\n

This article will take an in-depth look at the importance, methods, and equipment involved in electrical testing, and explain why it is crucial for improving the quality of PCB manufacturing.<\/p>\n

The Importance of Electrical Testing<\/h2>\n

Early Problem Detection Reduces Costs<\/h3>\n

In electronics manufacturing, defects can lead to financial losses. This is known as \u201cThe Rule of 10\u2019s,\u201d which is used to assess the cost of rectifying issues when they are discovered at different stages of the manufacturing process. If defects are detected early in the PCB manufacturing process\u2014for example, after the etching of inner layers or outer traces\u2014the issues can usually be resolved with simple repairs at a relatively low cost. However, if problems are not detected until the finished product stage, costs can multiply or even rise significantly higher. Therefore, the key to electrical testing lies in identifying boards with functional defects as early as possible to minimize financial losses.<\/p>\n

Preventing Substandard Boards from Entering the Market<\/h3>\n

Electrical testing helps prevent defective PCBs from entering the market. Downstream assemblers typically require PCB manufacturers to perform 100% electrical testing to ensure that the delivered PCBs meet specifications. By conducting multiple tests during the manufacturing process, defective boards can be identified early on and either repaired or scrapped, thereby ensuring the quality of the final product.<\/p>\n

Methods and Equipment for Electrical Testing<\/h2>\n

There are various methods and devices available for electrical testing. The following are three of the main types of electrical testing equipment:<\/p>\n

1. Dedicated Testing<\/h3>\n

Dedicated test equipment is designed exclusively for a specific PCB part number; its fixtures (pin arrays used for electrical testing) cannot be used with boards of different part numbers. While the fixtures for this type of test equipment are relatively simple to manufacture, they cannot be reused. This equipment is suitable for boards with low test density, typically 10,240 points or fewer.<\/p>\n

2. Universal Grid Testing<\/h3>\n

General-purpose test equipment is based on the \"grid\" design principle for PCB circuits, using the grid to define the locations of test points. Fixtures are relatively simple to manufacture, and probes can be reused. General-purpose testing is typically suitable for most boards, with the number of test points usually exceeding 10,000 and a moderate test density.<\/p>\n

3. Flying Probe Testing<\/h3>\n

The principle behind flying probe testing is simple: it tests the two endpoints of a circuit one by one by moving two probes. Unlike other methods, it does not require the fabrication of expensive fixtures. However, due to its relatively slow testing speed, it is more suitable for prototype manufacturing and small-batch production. Flying probe testing is suitable for high-density circuit boards.<\/p>\n

Electrical testing helps detect and resolve electrical issues on circuit boards early on, reducing cost losses and preventing defective products from entering the market. Different electrical testing methods and equipment can be selected as needed to ensure product quality.<\/p>","protected":false},"excerpt":{"rendered":"

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