Precision machining > Chemical AND electrochemical etching

Chemical or electrochemical etching

Advantages

Chemical etching and electroetching is used to manufacture high precision metal parts. By using chemicals to dissolve the excess (or unwanted) portion of the material, rather than simply “cutting” it away, you are left with smoother, more precise edges.

The benefits of this technique are:

- No burrs

- No stresses

- No deformation

- No effect on the metallic properties

- Precise control of the “Z” dimension (depth)

- Rapid turnaround

Process

Chemical etching is a process that enables tooling of parts by chemical dissolution of a metallic foil, which has been locally protected with a photosensitive film.
The basis of electrochemical etching is similar, except for the use of a steady electrical stream. It is used for metals that cannot be etched chemically.
The metallic foil is coated with a photosensitive resin the low thickness of which enables greater accuracy in the definition of the image which is obtained, thanks to the insulation through a photographical tool representing the part to be produced. After development, the polymerised resin allows a local masking of the areas to be protected. The unprotected metallic areas are etched with a spray of an etchant to the metal to be dissolved. Asymmetrical etching of the two faces enables the obtainment of stepped shapes.



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    Our skills and proficiencies

    Hybrid microelectronics (lids and lead frames)

    Electrochemical etching for metals that cannot be dissolved chemically

    Treatment of refractory and hard metals

    Processing of the product without disconnecting

    Serial production