What is the difference between ICT and FCT in PCBA test?

What is the difference between ICT and FCT in PCBA test?

In the process of PCBA processing, it usually includes a series of processes such as component procurement, SMT chip processing, DIP plug-in processing, PCBA testing and finished product assembly.

1. The meaning of PCBA test PCBA test, which is translated into pcba test in English, is a very important process in the PCBA processing process. It is generally at the back end of the production link, specifically refers to the performance test of PCBA boards. PCBA testing is actually a series of processes in the process of PCBA processing, including component procurement, SMT chip processing, DIP plug-in processing, PCBA testing and finished product assembly.

PCBA test, which is translated into pcba test in English, is a very important process in the process of PCBA processing. It is generally at the back end of the production link, and specifically refers to the performance test of PCBA boards. PCBA test is a general term for all kinds of tests.

2. What does PCBA test include

PCBA test is an important means to strictly control the delivery quality. PCBA test includes many kinds of tests, mainly including ICT test, FCT test, aging test, fatigue test, vibration test, high and low temperature test.

3. PCBA test fixture

Professional PCBA test equipment (such as ICT tester and FCT tester) is powerful, but the price is very expensive. Therefore, general PCBA processing plants will use PCBA test jigs for testing. The general test fixture can test the voltage, current, power and frequency with high speed and accuracy.

4. PCBA test point

Generally, PCBA boards have special PCBA test points. The PCBA test equipment contacts the test points of PCBA boards through probes to inspect the performance of PCBA boards with incoming materials.

In simple terms, PCBA testing is to use special equipment to test PCBA circuit boards to judge the quality of PCBA circuit boards and ensure that the products shipped to customers are intact.

PCBA circuit boards are generally subject to strict electrical and performance tests before being delivered to customers. In PCBA test, the most common are FCT function test and ICT electrical component test.

PCBA test is a key step to ensure the delivery quality. General customers need to provide a test plan, including test points, procedures, test steps, etc. PCBA electronic manufacturer shall perform corresponding ICT and FCT tests according to design documents. ICT (In circuit Test) is mainly aimed at component level. It is an important means to detect the value and polarity of resistance, capacitance, inductance and other components by contacting the pin of each component on the PCBA board and measuring whether its value is consistent with the nominal value.

However, with the rapid development of the manufacturing capability of the electronic industry, ICT testing has become less and less, because the quality of many components can reach below 50PPM, fully meeting the process yield of electronic products. At this point, FCT (Function Test) is particularly important. The PCBA manufacturer will issue the FCT test rack according to the design documents, place the PCBA board on the test rack, capture the test points on the PCBA board, write the program through the burner, and then simulate the input and output actions of the product to achieve the test purpose. In some cases, the upper computer software is also required to cooperate. FCT test is a kind of functional test close to the product level, which can effectively cover the product performance range and is a very effective means.