Overview

Mesh chemical etching turns flat metal sheet into a one-piece mesh whose aperture field is dissolved out rather than woven or punched. The photochemical process laminates dry film resist onto the sheet, exposes it to UV through artwork carrying the full hole pattern, then sprays matched etchant from both sides so every unprotected area dissolves at the same rate. The result is a flat, burr-free mesh with uniform apertures, and it has no woven nodes, no loose strands and no weld dots — stainless steel 304/316L, nickel 200, copper C11000, brass and titanium run from 0.02 to 1.5 mm on one line.

Against woven wire cloth or perforated sheet, mesh chemical etching holds aperture size and web width consistently across the whole panel and still allows several open-area zones on a single blank. Dense filtration fields, wide flow windows, solid borders and mounting holes can be dissolved in one operation, and logos or part numbers can sit in the solid land between apertures. Chemical removal adds no heat and no mechanical stress, so panels leave the line flat and move straight into forming, welding or assembly.

Parameter Window

• Available Materials: stainless steel 304/316L, nickel 200, copper C11000, brass C2680, titanium Grade 1/2
• Material Thickness Range: 0.02–1.5 mm
• Tolerance: ±0.05 mm on outline; aperture size ±0.02 mm or ±10% of aperture, whichever is greater
• Minimum Feature: 0.06 mm slot width on 0.03 mm foil; web between apertures ≥ 0.1 mm
• Surface Options: passivation, electropolishing, slitting, forming, spot-welded tabs, protective film
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Aperture Review — Convert the mesh drawing into film artwork and check every aperture, web and open-area zone against the chosen stock thickness.
2. Material Selection — Pick alloy and temper for the duty cycle: stainless for corrosion resistance, nickel for conductivity, copper for thermal tasks, titanium for weight reduction.
3. Cleaning & Lamination — Degrease the sheet and hot-roll dry film resist so no bubbles sit under fine webs and the pattern registers cleanly.
4. UV Exposure — Expose through high-resolution artwork aligned to the sheet edge so aperture position holds across the full panel.
5. Development — Wash out unexposed resist to open each aperture and contour, then check the fine webs for pinholes or residual film.
6. Double-Sided Etching — Spray matched chemistry from both sides while time, temperature and line speed hold aperture size and sidewall angle in range.
7. Stripping & Finishing — Strip the resist, neutralize and dry, then slit, form or weld tabs wherever the assembly needs them.
8. Inspection & Packaging — Verify aperture size, open area, burr condition and flatness against the approved sample, then pack flat on liner.

Core Advantages

1. One-piece integrity: Etched mesh carries no woven nodes, weld dots or loose strands, so it will not unravel or shed wires under pressure.
2. Uniform apertures: Every hole comes from the same film exposure, keeping aperture size, web width and open area consistent across the panel.
3. Burr-free, flat parts: Chemical removal leaves no roll-over or hardened rim, and panels stay flat through forming, welding and assembly.
4. No tooling cost: A new aperture pattern is simply new artwork, so prototypes and design revisions skip die cost and die lead time entirely.
5. Fine features in foil: Slots down to 0.06 mm hold on 0.03 mm foil, which makes micro perforated metal mesh practical for sieves and protective screens.
6. Pattern freedom: Mesh chemical etching can vary open area on one blank and carry logos, flow arrows or part numbers in the solid land at no extra process cost.

Typical Applications

• Filter discs and cartridges: Controlled aperture fields for fuel, air and fluid filtration with predictable flow rate and retention.
• Ventilation and acoustic grilles: Hole arrays that balance airflow, dust control and sound transmission in housings and panels.
• EMI/RFI shielding windows: Aperture-tuned panels that manage attenuation and heat escape in instrument enclosures.
• Sensor protection screens: Fine mesh that keeps particles off pressure and flow sensors without choking the media path.
• Laboratory sieve meshes: Graded aperture zones for particle sizing, sample preparation and analytical equipment.
• Speaker and pickup grilles: Decorative hole fields with burr-free edges that sit flat against acoustic foams and gaskets.

Design Notes & Process Considerations

1. Aperture versus thickness: Through-apertures should be at least equal to material thickness; tighter openings risk incomplete etch or fragile webs.
2. Web width: Keep webs between apertures at 0.1 mm or more in foil and scale them up in heavier stock so the mesh stays dimensionally stable.
3. Open-area versus rigidity: Very high open area softens the blank, so add solid borders, mounting tabs or frame rings wherever the part is handled or welded.
4. Etch compensation: Sidewalls taper about half the etch depth per side, so oversize apertures in artwork whenever a close fit matters.
5. Panel layout: Nest parts on shared frames with common registration marks to cut handling cost and keep unit pricing down.
6. Surface condition: Call out passivation or electropolishing where cleanliness or appearance matters — mesh chemical etching leaves edges burr-free, so both finishes stay stable.