The solder resist is – especially with SMT components – a basic requirement for safe soldering. With LPKF ProMask, a professional solder resist mask can be quickly and effectively applied to already structured circuit boards.
The solder resist mask is printed from the CAD program onto a transparent foil, transferred to the printed circuit board and developed. In just four steps, the structured circuit board is given a perfect surface finish in just a few minutes for soldering without short circuits.
The legend printing follows the same principle: ProMask and ProLegend are supplied with all necessary tools and consumables for a perfect result.
LPKF ProMask and LPKF ProLegend are essential for fast, simple and cost-effective PCB prototyping or small series production. A photographic exposure process transfers all structures or lettering exactly to the printed circuit board.
With LPKF CircuitPro and a standard laser printer, you can create a photo template with the desired layout on a transparent film.
2. apply the lacquer
Mix the solder resist from the pre-portioned lacquer and hardener. Apply the solder resist onto the structured circuit board using the enclosed roller. The PCB is then pre-dried in a hot-air oven for 10 minutes.
3. expose the photo template
Position the template on the printed circuit board and place both in the exposer. Activate the exposure unit for 30 seconds. Remove the circuit board and remove the template.
4. develope and cure the solder resist mask
Mix the developer bath with the developer powder and hot water. Dissolve the unexposed solder resist in the developer bath using a brush. The solder resist is then hardened and cleaned in a hot-air oven for 30 minutes. Finally, a pH conditioner in powder form neutralizes all chemical components for environmentally friendly disposal.