Overview

Custom filter mesh etching cuts precise, uniform aperture patterns into metal sheet so filtration media behave the same in every batch. A photoresist mask carrying the mesh layout is exposed and developed, and the unprotected metal dissolves in a matched etchant, producing holes and bridges in the material itself rather than woven into it. Stainless steel 304/316L, copper, nickel and titanium run from 0.05 mm to 1.0 mm thick, and because the process is chemical, screens come off the line flat and burr-free — no wire ends, no snag points and no open-area variation across the sheet.

Filter performance is decided by aperture size, open area and bridge strength. Custom filter mesh etching holds apertures to ±0.01 mm and open area within a few percent of nominal, with the same pattern repeating exactly from the first sample to full production. Etched screens also take secondary treatments — passivation, electropolishing, plating — without distortion, so they fit fuel, hydraulic, food and process filtration duties where woven mesh drifts in rating and clogs at broken wires.

Parameter Window

• Available Materials: stainless steel 304/316L, copper, nickel, titanium
• Material Thickness Range: 0.05–1.0 mm
• Tolerance: aperture ±0.01 mm, open area ±3% of nominal, profile ±0.05 mm
• Minimum Feature: 0.08 mm aperture and 0.06 mm bridge on 0.1 mm sheet
• Surface Options: passivation, electropolishing, electroplating, black oxide, edge framing and bonding
• Compliance: ISO 9001 process control, RoHS/REACH material traceability

Manufacturing Process / Workflow (8 Steps)

1. Mesh Pattern Review — Convert the aperture layout to film data and check hole size, pitch, bridge width and open area against sheet thickness.
2. Material Selection — Match alloy to media: 304/316L for general corrosion duty, copper for conductivity, titanium for aggressive chemistry.
3. Cleaning & Lamination — Degrease the sheet and laminate dry film resist evenly so fine bridges resist cleanly during etching.
4. UV Exposure — Expose the mesh pattern through high-resolution film registered to panel marks for uniform pitch across the sheet.
5. Development — Open all aperture areas and inspect for scum or partial openings that would block flow after etching.
6. Etching — Spray etch with time, temperature and line speed tuned to hold aperture size and keep bridge widths on nominal.
7. Stripping & Surface Treatment — Remove resist, neutralize, then passivate, electropolish or plate; frame or bond edges where the screen mounts in a housing.
8. Inspection & Packaging — Verify aperture, open area and flatness against the approved sample, then pack with interleaf to protect fine bridges.

Core Advantages

1. Controlled open area: Aperture and pitch are fixed by film data, so flow rate and dirt-holding behavior stay within a few percent of nominal.
2. Uniform aperture: Every hole on the sheet etches together, giving one rating across the screen instead of the tolerance spread of woven wire.
3. Burr-free and flat: No wire ends or roll-over edges means no shedding fibers into the media and no clog points at broken strands.
4. Bridge strength by design: Bridge width is set in the drawing, so mechanical strength can be tuned for differential pressure instead of guessed.
5. No tooling cost: New mesh layouts and aperture changes are only new films, so custom filter mesh etching stays economic for prototypes and mixed batches.
6. Finish-ready surfaces: Passivation, electropolishing and plating apply cleanly on flat etched sheets, extending service life in corrosive media.

Typical Applications

• Injector and fuel screens: Small-diameter etched discs with fine apertures that protect nozzles from particulate in fuel systems.
• Hydraulic filtration plates: Rigid etched screens that hold rating under pressure without the flex of woven media.
• Process and food sieves: Flat sieve sheets with exact cut points for dosing, grading and powder separation lines.
• Vent and breather filters: Corrosion-resistant mesh for enclosures that must breathe while keeping dust and splash out.
• Gas and sensor protection: Fine mesh that shields detectors and flow elements from particles without blocking the measured stream.
• Melt and polymer filters: Nickel and stainless screens for high-temperature extrusion filtration where mesh strength matters.

Design Notes & Process Considerations

1. Open area versus strength: Raising open area above 50% thins bridges quickly; fix the minimum bridge width before the pattern is drawn.
2. Aperture and thickness ratio: Keep aperture at 1 × sheet thickness or larger for clean holes; deeper ratios slow etching and round the edges.
3. Edge framing: Specify whether the screen is supplied as a plain sheet, with an etched frame, or bonded into a ring for direct installation.
4. Media compatibility: Name the fluid, temperature and cleaning regime, so the alloy and passivation choice matches the service, not just the catalog.
5. Flatness and handling: Call out flatness per 100 mm and require interleaf packing; fine bridges bend under point loads and cannot be flattened back.
6. Inspection sampling: Agree on how open area is verified — optical measurement or flow test — so incoming checks agree with the values custom filter mesh etching reports.