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What are the methods to avoid short circuit in SMT chip processing?
Time:2022-06-18 Read: 283

In the welding process of SMT chip processing, short circuit is a common processing situation. In order to achieve good results, the short circuit problem must be solved. If there is a short circuit on the PCBA circuit board, it must not be used. There are also many ways to solve the short circuit problem in SMT chip processing. Next, Shenzhen PCBA processing manufacturer - Lekas will introduce the method to avoid short circuit in SMT chip processing.


The method of avoiding short circuit in SMT chip processing


1. It is necessary to develop a good habit of manual welding operation. Use a multimeter to check the circuit for shorts. Every time the IC is manually SMT patched, it is necessary to measure whether the power supply is short-circuited with a multimeter.


2. If there is a short circuit in the same batch in the SMT patch processing, you can take a board to cut the line, and then energize each part to check the short circuit part.


3. Use a short-circuit location analyzer to check.


4. If there is a BGA chip, since all the solder joints are covered by the chip and are not visible, and it is a multi-layer board (more than 4 layers), the power supply of each chip should be separated during design, and connected with magnetic beads or 0 ohm resistors, so that When the power supply is shorted to the ground, the magnetic bead detection is disconnected, which is convenient for locating a certain chip.


5. Be careful when welding small-sized SMT chip capacitors, especially the power supply filter capacitors (103 or 104).

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