Flexible Solder Mask - Resist for Flexible PCBs
These resists are photoimageable solder masks specifically developed for flexible PCB surface protection. ELPEMER® SD 24X3 FLEX-HF series are halogen-free (HF), photoimageable solder masks for flexible boards and well cover bending requirements during assembly processes.
Also available are excellent UV-curing solder resists for high throughput flexible applications, e.g. on mobile phone connectors, hand held devices in general or for high reliability requirements. UV curing flexible Soldermask of the series SD 24X0/201 UV-FLEX-HF and SD 23X3 UV-FLEX are suitable for lower resolutions requirements. They perfectly satisfy flexibility requirements as well as thermal loads during lead-free soldering processes.
All products are applied by screen-printing. The most important products and features in our flexible solder mask range are shown below.
Overview most important Products (for details please contact our local or global sales staff)
| Product Name | Properties & Explanations |
|---|---|
| SD 24X3 FLEX series | Flexible photoimageable Soldermask for the screen printing application Available in green, blue, red, white, black and grey Halogen-Free (Index HF) in accordance with JPCA-ES-01-1999 Excellent flexibility and reliability Mainly used for flexible PCB's and as flexible cover-coat on rigid-flex boards due to it's excellent temperature stability |
| SD 24X0/201 UV-FLEX series | 2 Component UV-curable screen printing Soldermask Available in green, blue, red, white, black and grey Halogen-Free (Index HF) in accordance with JPCA-ES-01-1999 Excellent flexibility and reliability Mainly used for flexible antenna modules and as top coat in cross-over technology |
| SD 23X3 FLEX series | 1 Component UV-curable screen printing Soldermask Available in green, white and black Halogen-Free (Index HF) in accordance with JPCA-ES-01-1999 Excellent flexibility and reliability Mainly used for flexible antenna modules due to its high resistance in environmental reliability tests as e.g. the salt mist test |
Flexible solder mask / resist manufactured by Lackwerke Peters, distributed and serviced in Asia by Atotech.


