Micrometal specializes in industrial production of highly accurate metal micro components. This is enabled by the well-matched system of continuous precision etching, use of a special liquid photoresist system and high-precision glass tools.

Micrometal produces highly accurate metal micro components

The metal etching know-how developed by Micrometal is considerably different from conventional chemical etching processes, laser processing, or fine stamping. Customer data is processed via CAD to produce a high resolution glass tool. The metal (or metal alloy) requested by the customer - which begins in the form of a coil - is first cleaned and then coated on both sides with photoresist.
At this point, our process departs from standardized approaches. While it is common to use a relatively thick dry film resist, Micrometal uses a special liquid resist system to obtain ultra-thin photoresist layers enabling a higher degree of precision in the chem milling process. As in lithography, the metal strip is exposed through glass tools that are specially produced for each customer.
The photo chemical machining process enables ultra-precise contours to take shape in the developer. Afterwards, the metal strip passes through a wet etching process that allows a wide range of geometries. After cleaning and drying, controls are performed based on random samples or comprehensive automatic checks. Depending on the customer's needs, the finished metal parts are packaged either as endless reel-to-reel products, in sheets or as individual parts.

While usually dry film is used in the chemical etching industry, Micrometal reaches the  thinnest photoresist layers using a special wet resist. Liquid resists are optimal for high-precision mass production in an endless process because of the significantly lower resist thickness (2 to 8 microns). The result is a significantly higher imaging accuracy.

Our unique Inline facility allows us to produce tightest tolerances even in the single digit micron range. The special wet resist and the specially adopted exposure system are balanced in a way that parallax problems, known from common metal etching companies, do not occur.

The linking of the individual process steps enables etching in a quasi-steady state, and thus we can achieve the highest accuracy with very tight tolerances.

A minimum hole diameter of 80% of the material thickness can be realized. Micrometal is capable of processing metal from 0,025 mm.

Our precision etching process can match tolerances in the single-digit micrometer range.

To meet the highest demands on precision, Micrometal uses glass tools. Compared to traditional tools, glass tools have better picture reproduction, higher resolution and longer lifetime stability. This is indispensable for the necessary two-sided, referenced imaging (upper to lower glass). Glass tools allow shorter delivery times, higher precision, and far longer lifetimes compared to others mecanical tools like stamping.

Due to the size of our glass tools, maximum design surface dimensions are up to 760 mm long and 280 mm wide. The starting material - often stainless steel - can have a width up to 330 mm.