Photochemical Machining

Over 40 years of Photochemical Machining experience

Elcon has been known for its advanced photochemical machining process since 1967. We are able to produce even extremely difficult requirements by tightly controlling every aspect of the process. Elcon utilizes a variety of etchants, some proprietary, to process a wide variety of materials including molybdenum, tungsten, titanium, and gold. We utilize both dry and liquid resist depending on your application. Even the size of the metal sheet is optimized based on the tolerances and geometry. As a result, Elcon is able to produce finer geometry with greater precision than a standard etching process.

The process of photochemical machining uses a photosensitive polymer called photoresist to produce a mask that is highly precise and selectively protects the sheet from acid. Our engineers create a tool containing a negative image of the part step and repeated throughout. This tool is used to expose that image onto the photoresist. Specialized etching equipment then uses acid to selectively remove any material left unprotected by the mask, precisely cutting all the features of your part. The mask is then stripped from the metal, resulting in a burr free sheet of precision parts. Elcon’s tight process controls offer the ability to achieve a tolerance as tight as +/-.0002” on some parts.

With this process, part complexity does not increase part cost, giving you the flexibility to produce highly intricate configurations reliably and cost effectively. Tooling is fast and inexpensive, making the process ideal for prototyping; however, the flexibility, repeatability, and precision mean it is ideally suited for medium and high volume production as well. Typical lead times are 3 weeks and expedited service can be turned around in a few days.

Photochemical Machining: "Is a process of using photoresist to preserve the surface of metal, while using an etchant to dissolve away selected areas."

Wide range of Exotic Materials Available
Ability to Etch More Precise Geometry
Cost Effective Prototypes

Proprietary Chemistry
Dry Film and Liquid Resist
Inexpensive Tooling
Capability to Produce Fine Geometries

Photochemical Machining Specifications

Minimum Material Thickness

Minimum Material Thickness

0.0005 inches (in)
0.0012 centimeters (cm)
0.0127 millimeters (mm)

Maximum Material Thickness
Minimum Hole Diameter
Minimum Space between features
Minimum 3D Photo Etching on a curve surface
Maximum 3D Photo Etching on a curve surface
Maximum Sheet Length
Maximum Sheet Width
Typical Sheet Sizes
Tolerance 24 x 20 flat sheet
Tolerance 6 x 6 flat sheet
Tolerance for a curve surface ( @ .07" Diameter )
Tolerance for a curve surface (@ 18" Diameter )

Photochemical Machining Specifications

Photochemical Machining

Elcon has been known for its advanced photochemical machining process since 1967. We are able to produce even extremely difficult requirements by tightly controlling every aspect of the process.  


Other Services

Metallization of Ceramics

Elcon uses proprietary technology to provide industry leading metallized ceramics and sapphires.

Learn More...

Brazed Assembly

Elcon has been producing some of the most challenging brazed assemblies for over 30 years.

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Precision Machining

Elcon offers CNC machining and turning services held to that same quality standard with the expertise to meet your machining needs.

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Elcon Precision LLC | Photochemical Machining | Metallization | Brazing
With more than 40 years of experience, Elcon Precision LLC is a trusted service provider of Metallized and Resistive Coated Ceramics, Vacuum and Atmosphere Brazed Assemblies, and Photochemically Machined Parts.


1009 Timothy Drive, San Jose, CA 95133


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ITAR Compliant