To avoid errors during the PCB assembly process, the following points are essential.

One. Offer completely PCB fabrication production files to manufacturer

BOM List

Gerber

Pnp file

PCBA testing file

Two. PCB manufacturing and assembly drawing

Specification of PCB bare board：

Drilling a hole

Hole map

The layers are stacked

Notes (PCB material and thickness, copper weight, tolerances,Surface finish, and special requirements)

Circuit Board Assembly Instructions:

Circuit Board Overview

Component Shapes

Bill of Materials

Mechanical Parts

Assembly Instructions

Additional Notes

Expanded Cross-Section View

Identification Tag Locations

Three. Correct PCB Assembly

Four. Make sure the silkscreen is be clearly visible

Circuit Board Overview

Component Shapes

Bill of Materials

Mechanical Parts

Assembly Instructions

Additional Notes

Expanded Cross-Section View

Identification Tag Locations

Five. Make sure the silkscreen is be clearly visible

Six, Identify the polarity of electronic components

The cathode and anode are identified on components such as electrolytic capacitors, leds, diodes and ics

Seven. Isolate leaded and lead-free electronic components

Seven. Component spacing

Avoid the problem of spacing between components during assembly

Eight. Large components are placed evenly

Large components are placed evenly so that the heat can be evenly distributed during reflow soldering, and the PCBA manufacturer will set the heat curve of reflow soldering.

Nine. DFM Check

Design for Manufacturability (DFM) checks can identify design errors at an early stage and prevent problems such as rework repairs at a later stage