UV curing lamp for wood coating

Fri, 26 Jun 2026 10:01:22 +0800

On the PCB line, the solder mask cure is where fine geometry meets reliability. Traces and gaps are measured in microns, so under-cure leaves you fighting adhesion, and over-cure can invite heat-driven delamination. The UV lamp has to deliver repeatable energy exactly where the ink needs it—no spectral drift allowed. What matters under the hood We build the lamp around a high-pressure mercury vapor source, tuned hard on 365 nm. That wavelength lines up with the photoinitiators in solder mask inks and drives cross-linking through the full layer thickness. Peak irradiance is set to 1200–1500 mW/cm² at the substrate plane, and the system holds energy density above 800 mJ/cm² across the board profile. The reflector uses a dichroic coating to kick IR out of the beam, so the board stays cooler and dimensional stability doesn’t get compromised. Spectral output is held within ±3% over the life of the lamp, and output decay stays under 5% after 5000 hours. We spec low ozone operation to keep the workspace clean and protect sensitive components. Why this works on the floor In PCB production, you get consistent cure at fine pitch. Adhesion passes testing on 50/50 μm lines, rework drops, and throughput stays stable. With stable spectral output and tight spot uniformity, the same cure profile runs hour after hour—even across lamp changes. Energy use falls because the reflector efficiency and the tight spectral match put more usable photons into the ink per watt. The things you learn the hard way Match the lamp to your cure window. Make sure the reflector focal distance and the cure zone width fit your board format. Expect a warm-up period before the spectrum settles, and plan reflector inspections every 2000 hours to keep uniformity tight. For high-density boards, double-check that your ink’s photoinitiator spectrum lines up with the 365 nm output. When the spectra don’t match, you’ll see marginal adhesion—even at high irradiance.

Wood on UV Curing Lab

UV curing lamp for wood coating