INNOETCH’s standard metal etching workflow follows a structured photochemical etching sequence designed to convert customer drawings or samples into consistent, precision thin metal components. The typical flow includes engineering review, material preparation, phototool creation, surface cleaning, photoresist application, imaging, developing, chemical etching, resist removal, cleaning, optional secondary operations, inspection, and final packaging. Each step is controlled to support fine openings, smooth edges, stable dimensions and repeatable batch quality for custom etched parts。
Engineering and manufacturability review The workflow begins with review of customer drawings, samples, material requirements, thickness, feature geometry, tolerance expectations, surface requirements, quantity and application details. At this stage, engineers confirm whether the part is suitable for photochemical etching, identify features that require special process control, and check design elements such as hole size, web width, half-etched areas, logos, bending zones, elastic structures and mesh patterns. For prototype and production projects, INNOETCH supports engineering design optimization based on etching process characteristics to help balance feature accuracy, production stability and part function
Material selection and incoming preparation INNOETCH works with stainless steel, copper, nickel, molybdenum, aluminum and other metal materials according to project needs. Before processing, sheet material is checked for thickness, surface condition, flatness and basic suitability. Because etching performance is affected by material temper, surface condition and alloy type, proper incoming preparation helps reduce defects such as uneven etching, poor resist adhesion or inconsistent feature size
Phototool and process setup After drawing confirmation, the production artwork is prepared for imaging. The phototool defines the pattern that will be transferred to the metal surface, including openings, solid areas, half-etch zones, identification marks and functional features. Accurate artwork setup is especially important for parts such as precision metal mesh,etched stainless steel mesh, encoder discs, IC lead frames, speaker grilles, filter mesh and precision shims, where small geometry errors can affect fit, function or appearance
Cleaning and surface preparation The metal surface is cleaned to remove oil, oxide, dust and other contaminants that could interfere with photoresist adhesion. Good surface preparation is a basic requirement for uniform coating, sharp image transfer and consistent etching. If the surface is not properly prepared, resist lifting, rough edges, uneven etch depth or localized over-etching may occur
Photoresist coating A light-sensitive resist layer is applied uniformly to the cleaned metal sheet. The coating protects areas that should not be etched while exposing the areas intended for material removal. Coating uniformity is important because uneven resist thickness can cause inconsistent development or etching results across the sheet
Exposure and development The prepared phototool is aligned with the coated metal, and the resist is exposed to transfer the part pattern. After exposure, the unprotected resist is removed in the development stage, leaving the selected metal areas exposed for etching. This stage determines the accuracy of the etched pattern before chemical processing, so alignment, exposure control and development quality are closely managed
Controlled chemical etching The patterned sheet enters the etching stage, where controlled chemical solution removes exposed metal to form the required openings, profiles, slots, grooves, mesh holes, half-etched features or decorative textures. Photochemical etching can produce burr-free edges and fine structures without the mechanical stress associated with some conventional forming or cutting methods. Process parameters are controlled to support etch uniformity across the sheet and stable feature definition for both simple and complex thin-metal geometries
Resist stripping and cleaning After etching is completed, the remaining photoresist is stripped from the metal surface. The parts are then cleaned to remove process residues. This step is important for surface quality, especially for components used in electronics, semiconductors, filtration, acoustic devices, medical devices, precision machinery and other applications where residue control matters
Optional secondary operations Depending on part design and application, additional steps may be performed after etching. These can include forming, bending, leveling, polishing, localized surface treatment, marking, lamination support where applicable to the etched assembly, or other customer-specified operations. Elastic elements, shims, structural parts, nameplates and craft ornaments may require different post-etch handling based on function and appearance requirements
Inspection and quality control INNOETCH applies quality control covering dimensions, tolerances, surfaces, edge quality, flatness, consistency and production reliability from sample development through mass production. Inspection checks typically include verification of feature size, hole quality, edge condition, surface appearance, etch depth for half-etched areas, flatness and batch-to-batch consistency. For mesh and filter products, opening uniformity and web integrity are important. For electronic and semiconductor components, dimensional accuracy and edge quality are often critical. For shims and mechanical parts, thickness consistency and flatness may receive special attention
Packaging and release Finished parts are packaged to protect surfaces, edges and flatness during handling and shipment. Packaging method is selected according to part geometry, material, surface sensitivity and quantity to reduce bending, scratching or contamination risk before delivery
This standard workflow supports a wide range of custom etched metal components, including precision metal mesh, etched stainless steel mesh, precision shims, elastic metal elements,IC lead frames, encoder discs, speaker grilles, filter mesh, semiconductor and electronic precision components, mechanical etched parts, custom metal nameplates and craft ornaments. For project review, drawings, material specifications, dimensions, tolerances, quantity and application requirements can be sent to nico@innoetch.com.