Flexible PCB Manufacturer & Assembly Service

Flexible PCB Manufacturer & Assembly – One-stop services

sales12@hitechpcb.com

Hitech Circuits Co.,Ltd is a professional flexible pcb, FPC printed circuit board manufacturer, supplier from China, due to its features of bendable, reducing product size, good heat dissipation and solderability, easy assembly and low overall cost etc, it is widely used in mobile phones, wearable smart devices, automobiles, medical treatment, and industrial control etc. If you are looking for a reliable flexible PCB board partner in China, please don’t hesitate to contact sales@hitechcircuits.com

Flexible PCB


SMT: Technical Points for Mounting Flexible PCB

There are many differences between the flexible PCB SMT process and the SMT solution of the traditional rigid PCB. If you want to do the SMT process of the flexible PCB, the most important thing is positioning, because the hardness of the flexible PCB is not enough, it is softer, and if the special carrier is not used, it cannot be fixed and transmitted, and the basic SMT processes such as printing, patch, and furnaces cannot be completed. The key points of pre-processing, fixing, printing, patch, reflux welding, testing, and division plates of flexible PCB in the production of SMT production are specified as below.



1. Flexible PCB pretreatment

The flexible PCB is softer, and it is generally not a vacuum packaging when it leaves the factory. It is easy to absorb the water in the atmosphere during the transportation and storage procedures. You need to prepare pre-baking treatment before the SMT patch process and slowly discharge the water, otherwise, under the impact of reflux welding at high temperatures, the water absorbed by the FPC quickly vaporizes into steam, which can easily lead to poor flexible PCB layer departure and foaming.



Generally, pre-baking temperatures are 80-100℃ for 4-8 hours, however, under the special condition, the temperature can be raised to more than 125℃, but need to shorten the baking time accordingly. Before baking, be sure to take a small sample test to determine whether the flexible PCB can withstand set baking temperatures, you can also consult flexible PCB manufacturers with appropriate baking process. When baking, don’t put too much flexible PCB for one time, 10-20 panels are more suitable. Some flexible PCB manufacturers may put a piece of paper among each flexible PCB to isolate them and at the same time need to check if the paper can bear the baking temperature, if it cannot be, then pull off the paper before baking. After baking, if the flexible PCB does not have the issues like visible change in color, out of shape, and up warp, etc and then need the IPQC to do sampling inspection.