Albert Tsang

Photo etching is a fast, efficient and cost-effective method for the manufacture of small precision metal parts using etchant chemistries. It is well-suited for development, prototype and production volumes, and has the ability to ramp up from low- to high-volume runs extremely quickly. Photo etched parts are burr and stress-free, the complexity of shape is unlimited, and there is absolute flexibility to change the design at any time as the process uses easily altered digital tooling.

As a precision sheet metal machining technology, photo etching achieves exacting tolerances, is highly repeatable and in many instances is the only technology that can cost-effectively manufacture precision metal components with the accuracy necessary in demanding and often safety critical applications. Once design engineers select photo etching as their preferred metalworking process, it is important that they fully appreciate not just its versatility, but also the specific aspects of the technology that can affect—and in many instances enhance—product design. This article analyzes the key considerations that design engineers must appreciate to get the most from photo etching and benchmarks the process against other metal machining technologies.