UV Laser Marking Machine
355 nm cold processing · 15 um focused spot · minimal HAZ
15 days includes international freight. Expedited orders ship by air with priority scheduling. Custom models take 15-30 days.
| Parameter | Specification |
|---|---|
| Wavelength | 355 nm |
| Power | 3W / 5W / 7W / 10W / 15W (20W customizable) |
| Min. spot | 15 um |
| Scan speed | up to 7000 mm/s |
| Repeatability | ±0.02 mm |
| Cooling | Constant-temperature chiller |
| Working area | 110 / 175 / 300 mm² |
Machine details
A UV laser marking machine works at 355 nm and is a classic cold process. Unlike a 1064 nm fiber laser, which melts or vaporizes material through heat, 355 nm photons carry higher energy and break molecular bonds at the surface photochemically, so almost no heat travels into the surrounding area. That is exactly why it is irreplaceable on heat-sensitive work: glass does not chip, thin-wall plastics do not yellow or warp, and wafers do not develop micro-cracks from thermal stress.
The ZY-UV reaches a minimum focused spot of 15 um, with scan speeds up to 7000 mm/s and repeatability of +/-0.02 mm, so it holds characters down to roughly 0.1 mm and fine 2D codes with stable contrast. On PCBs, FPC boards, chip resistors and miniature sensor housings - anywhere the marking area is tiny but must stay scannable - spot size is the variable that decides yield. A smaller spot raises energy density per unit area, sharpens edges and shrinks the heat-affected zone at the same time.
On power selection: 3 W suits shallow marking on plastic keys and silicone parts; 5-7 W covers glass, ceramics and the surface layer of anodised aluminium; 10-15 W is for applications that need measurable material removal and faster cycle times. 20 W is available to order. Every unit ships with a constant-temperature chiller, because stable optics temperature is what keeps spot size and pulse energy constant - without it, thermal drift makes mark depth vary visibly across a single production batch.
One boundary worth stating plainly: 355 nm is not well absorbed by metals. If your main work is deep engraving on 304 stainless steel or mould lettering, a 1064 nm fiber machine is the economical choice. UV's strengths are no heat and extreme fineness, not depth. Still unsure? Send your samples - we mark them free at our Dongguan factory and return both the sample and a marking video within 24 hours.
- Glass
- Plastics
- Semiconductor wafers
- PCB / FPC
- Ceramics
- Sapphire
- Silicone
Specifications depend on the final order configuration. Still choosing? Send your samples - we mark them free at our Dongguan factory and return both the sample and a marking video within 24 hours.
Get a quote →Why this machine class
Every point below is a checkable fact, not an unprovable promise.
- High-speed galvanometer scanning: fast, strong interference rejection, and a stable mark path over long runs.
- Integrated frame with high rigidity; changing a job means editing parameters, not dismantling the machine.
- Non-contact processing: no tool wear, clean and permanent marks that do not fade.
- Software imports DXF / PLT / BMF / AI / JPG artwork, editable on the PC before marking.
- Batch import from TXT / Excel, with automatic serial numbers, production dates, QR codes and barcodes.
- No consumables and low maintenance cost; the optical module is an industrial part whose service life is defined by its datasheet.
- Quiet operation with virtually no dust, suitable for 24-hour continuous running (a constant-temperature chiller keeps energy output stable).
- 355 nm cold processing with a minimal heat-affected zone: heat-sensitive parts do not yellow, deform or chip.
- 15 um focused spot keeps 0.1 mm characters and fine QR codes legible.
Industries served
Common workpieces by industry. Not listed? Send samples and we will trial-mark before proposing a solution.
PCB and FPC boards, micro components, chips and wafers, silicone keys, phone and charger housings, epoxy and insulating tape
Glass bottles and containers, ceramic tableware, alumina ceramics, quartz and sapphire
IV tubing, infusion and medicine bottles, silicone seals, batch codes and expiry dates on disposable device housings
Cosmetic bottle bodies, perfume glass, flexible tube coding, transparent and translucent plastic parts
Real machine photos
Buyer questions
For precision plastic parts, how does UV cold marking avoid yellowing or burning?
355 nm UV breaks molecular bonds photochemically, so heat barely spreads to the surrounding area and the carbonized yellowing typical of 1064 nm thermal marking does not occur. In practice, lower the pulse fluence first, raise scan speed and widen hatch spacing rather than re-scanning the same area. For yellowing-prone ABS and PC, run a low-power gradient test coupon to find the threshold. The ZY-UV chiller keeps pulse energy stable over long runs.
For micro characters on PCBs, what is the minimum line width of UV marking?
With a 15 um focused spot and ±0.02 mm repeatability, the ZY-UV reliably marks characters down to about 0.1 mm plus fine 2D codes. Real minimum line width depends on three variables: spot size, the material's absorption at 355 nm, and the f-theta lens focal length - a shorter focal length gives a smaller spot but a smaller field. Send 2-3 real boards and we will return the exact line width and contrast data for that substrate.
For fine marking on glass and ceramics, where does UV beat fiber on contrast?
Glass and ceramics absorb 1064 nm poorly and conduct heat badly, so fiber lasers tend to cause chipping and micro-cracks from local thermal stress. These materials absorb 355 nm far better, and the mark appears as a fine frosted or shallow-relief finish with clean edges. UV modifies only the surface layer, giving high contrast without weakening the substrate - which is why glassware, ceramics and sapphire are classic UV applications.
When marking flexible films and soft rubber, will UV burn through the substrate?
No, provided the parameters are matched. UV is a cold process and single-pulse energy can be kept very low; for films the key is to control peak power and pass count - better to make several light passes than one heavy one. The ZY-UV starts at 3 W, so surface coloring without penetration is achievable. We validate peel strength and appearance on your actual film thickness first.
Still choosing a machine?
Send your samples and we will return a marking video plus the marked parts within 24 hours. Our engineers recommend a model based on your material and cycle time.