Making the right choice for the finish is very important to ensure that the printed circuit board can be processed properly during the production phase. In addition, the type of finish is one of the factors that determine how long a printed circuit board can be stored before processing. As well as having different technical properties, the different types of finishes differ in price. Q.P.I. has an overview that can help to make the right choice of PCB finish.
Processing printed circuit boards
It’s a property of many of the substrate materials used that they absorb moisture. This moisture can lead to problems when soldering the board. When the printed circuit board heats up quickly the moisture vaporises. This vapour causes a high internal pressure in the printed circuit board. The more complicated the design is, the more chance there is of problems occurring due to this phenomenon. Q.P.I. has made an overview of how the printed circuit boards should be treated to prevent this problem that can be downloaded here.
A lot of requirements are placed on the design of a PCB. Requirements with respect to the functionality of the end product but also requirements when it comes to the manufacturability of the printed circuit board. Because, although production techniques are continuously improving, a good design is always easier to manufacture than a mediocre one. For example, a bad distribution of copper on the layers of a printed circuit board could lead to the board warping. During production attempts can be made to reduce or compensate this, however it’s much better to tackle the problem at source during the design phase. Q.P.I. has an overview of design tips that can lead to a better design.
The Q.P.I. engineers always assess the PCB design for manufacturability before production and consult you when there are aspects of the design that could be critical during the production process.
Detailed product specfications and design rules of printed circuit boards, multi layer, flex, flex-rigid, stretch, Al core PCB, stretch.
Useful links to support PCB design
|Trace Width Calculator||Finds how wide a trace should be for a certain current.|
|Wire Parameter Calculator||Gives the current carrying ability for wires and wire bundles based on their AWG|
|Resistor Calculator||Finds the closest standard resistor (and capacitor) values|
|RMS Value Calculator||Gives the RMS values for several common waveforms|
|L-C Filter Equations||Formulas and web calculato|