The top 9 PCBA mistakes to avoid, here are 10 common mistakes and how to avoid them easily.

1. The PCB panel is incorrect

The ideal panel will depend on the PCB and the process the components will go through. If it is too large or too small, it may not be suitable for the production line. Very thin PCBs (for example 0.8mm) may need to be in smaller panels to avoid bending. The lack of scrap tape may make handling during production and testing difficult. Breaking in the wrong place may mean that the component is not rigid enough, or that it is difficult to break through without damaging the component. The lack of reference points can cause alignment problems. The best practice recommendation is to allow your EMS partner to work with its PCB supplier to optimize the panel design.

2. Excessive complexity

Unfortunately, if you have SMT on both sides of the component, then its cost will be higher-in fact often twice as much-so don't do it unless you really need it. This also applies to through-hole components. Spending more time on PCB design in the early stages can help reduce time in the assembly phase, thereby reducing costs.

3. Wrong component size or shape size

It is worth checking carefully that the components you specify on the bill of materials (BoM) actually apply to the pads designed on the PCB. Also consider whether the body of the component is appropriate; usually, components are placed too close, or too close to the edge of the PCB, which may cause them to be damaged during disconnection or handling.

4. Vias in the pad

This is tempting when the space is tight, but in order to avoid the solder disappearing from the hole when trying to connect the component, the through hole needs to be

5. Too many types of components

Number of components

6. Mixed component size

As tiny components become more common, there is a temptation to use them, but if they are placed next to larger components that require more solder paste, the process becomes a bit tricky and may require more expensive stepped stencils . This is not a

7. Inappropriate PCB surface treatment

RoHS-compliant HASL is usually designated as a standard surface treatment, but it is not suitable for fine-pitch components. The shelf life of the silver finish is shorter than most-maybe ENIG is enough? Consider whether the initially listed surface is really the most suitable, and how to change it to another can save time and cost during the assembly phase.

8. Unnecessary components

When you go beyond prototyping, do you really need those test points or programming heads? Obviously, deleting them will reduce ongoing costs.

9. Lack of resistance

It may be easy for components to share pads or leave solder resist between pads on fine-pitch devices. Try to consider where the solder is going-and the cost of failure and rework in the event of an unwanted short circuit.

The top 9 PCBA mistakes should be avoided. When it comes to electronic components, there are many variables, so there are many opportunities for mistakes.