Attaching Components on PCBs

Before soldering, chips or SMDs (surface mounted devices) are often attached to the PCB (printed circuit board) with UV-curing adhesive. This allows, for example, several chips or other components to be glued onto on a circuit board within just a few seconds to prevent their falling or sliding out of position on the PCB. The secured chips can then be reflow-soldered in a single work step, which saves time and speeds up production.

Panacol’s adhesives for SMD assembly have been developed specially to cure rapidly at exposure to heat or under UV light. Once cured, the adhesives in the table below are short-term temperature-resistant and therefore suitable for holding components before and during reflow soldering onto PCBs.

On request these adhesives are also available in red colour or with fluorescent pigment to facilitate quality and application monitoring. Their red colour or fluorescence makes the adhesive clearly visible to allow the bond quality of every component to be easily inspected also in mass production. Especially the red stain creates a clear contrast to the usually green PCBs.

The table below lists a selection of Panacol adhesives that are suitable for holding components on PCBs and for reflow soldering. Further products and custom solutions are available on request.

UV-curing adhesives secure components on PCBs
Attaching Components on PCBs

Adhesive Viscosity [mPas] Base Curing* Properties
Vitralit® 6104 VT 80,000-90,000 acrylate UV
Vitralit® UD 2018
shear thinning epoxy
Vitralit® UV 2115
20,000-30,000 hybrid UV
Structalit® 3060 30,000-40,000 epoxy thermal fast curing
excellent adhesion on dissimilar substrates
Structalit® 5604 25,000-40,000 epoxy thermal red
fast curing

*UV = 320 - 390 nm