Looking for the best way to attach your COBs to your heat sink? Use a COB holder.
COB holders make it much easier to fix your chip to your heat sink and, more importantly, they make wiring far simpler as well. Rather than soldering (which sucks), COB holders offer “poke in” connectivity instead: just strip your cable and push it into the designated holes in the holder. There aren’t many manufacturers of COB holders – the 2 brands that are most prominent are Ideal and BJB. Some COBs (like Bridgelux Veros) don’t require holders at all.