Corrosion of electronics has to be considered as a realistic threat as result of the development of complex components with closer spacing.
With such close spacing extremely low levels of corrosive contaminants can lead to failure.
However coating an electronic assembly can protect the product against corrosion.
In the past coating of PCB’s was mainly used in high-tech application, but because of the increasing demand of electronic components in all kind of today’s equipment, the advantage of coating PCB’s became very obvious.
A coated PCB is protected against environmental influences and protects the components against chemicals, moisture, corrosion and mechanical load.
Coating a PCB can be done in many different ways. Many companies still use the “old fashion ways” of coating like dip coating, manually spraying and even a pencil or paint brush.
These ways of coating a PCB are not considered to be very consisted, reliable, cost effective or environmental friendly. Therefore DIMA developed a complete new range of selective conformal coating systems.
These systems range from a complete set of dispensing valves up to motion systems that will provide the most consistent, reliable and cost effective way to coat a PCB.
There are different dispense valves for low-, medium- and high viscosity fluids. Furthermore DIMA developed an unique spray valve.
The extended spray nozzle of this valve has a very slim design that will enable spraying in between high components.
All DIMA valves are fully air actuated providing the best possible dispense on/off control.
The DIMA dispense valves can easily be integrated into the DIMA motion systems.
The valve controls are integrated into the DIMA motion systems, or can be ordered seperately.
The range of motion systems start with a bench top solution, but also consists of stand-alone or fully Smema compatible in-line machine.
All the DIMA motion systems are utilised with a camera for easy programming.
Compared to many systems in today’s market an operator doesn’t have to stick its head inside the machine to create a program. He can literally turn his back to the machine while programming it.
The DIMA motion systems will have dedicated software that will enable any operator to easily determine areas for coating and areas that should stay protected from coating.
Depending on the type of motion system DIMA will have several option available. Among these options are: a 4th and 5th motion axis for dispensing in corners and underneath components, the possibility to mount up to 4 different dispensing valves per machine, an automatic fiducial recognition and cor-rection system, an automatic needle height and XY-offset detection system and off-line programming software.