Question

What are the causes of broken holes in PCB circuit board processing?

Answer 1

The reasons for interrupted holes in PCB circuit board processing are:

1. Drilling: incomplete holes, residues in the holes, hole wall roughness, drilling deviation, sharp edges, and excessively large nail heads.

2. Copper sinking: poor backlight, plug holes, copper sinking bubbles.

3. Electroplating: air bubbles, micro-etching overtime, thin tin plating, abnormal positioning of tin plating brightener, poor copper plating depth capability, etc.

Answer 2

Why sometimes there are no errors detected in the PCB design, but short circuits, broken boards and other defects still occur after production and processing?

That's because you didn't take the hole spacing into consideration, resulting in unavoidable loss during the assembly process.

In the production of single-sided or double-sided PCBs, non-through holes or through-holes are drilled directly after blanking; for multi-layer boards, drilling is done after the lamination is completed.

Drilling can be divided according to function: part holes, tool holes, through holes, blind holes, and buried holes. Conventional drilling is processed by drilling machinery. In actual processing, the spacing between drilling holes usually affects the processing of the drilling machine and the reliability of the finished product.

Answer 3

One-stop PCBA intelligent manufacturing manufacturer will tell you today what causes PCB board disconnection and analyzes the causes of PCB board disconnection.

To produce a complete PCB board, you need to go through a number of tedious and complicated processes. If there are some operational errors during the PCB board production process, it will lead to quality problems in the final product board and it will not meet the product requirements. Common PCB board disconnection problems will affect the realization of circuit board functions.
What causes PCB board disconnection? Next, Shenzhen PCB board manufacturing manufacturer will introduce some reasons for PCB board disconnection:

1. Film application process: The film is not firmly attached and bubbles appear. If the film is wet, there will be garbage contamination.

2. Exposure process: Problems caused by scratches or garbage on the film, including problems with the exposure machine, insufficient exposure, etc.

3. Development process: The development is blurry and unclear.

4. Etching process: The nozzle pressure is too high and the etching time is too long.

5. Electroplating problem: During electroplating, the plating is uneven or the surface has adsorption force.

6. Improper operation: During the circuit board production process, the circuit board is scratched and disconnected due to improper operation.

What is the cause of PCB board disconnection? First, look at the form of disconnection. By analyzing the disconnection form, find out which process caused the PCB board disconnection problem. Then, gradually analyze possible problems during the production process. Troubleshoot the cause.

Regarding what causes PCB board breakage? If you want to know more about the reasons for PCB board breakage, you can follow Lingzhuo PCBA. If you need to know more about PCB proofing, SMT patching, and PCBA processing relevant technical knowledge.