COMMENT geometries.


Why chemical etching? The process of chemical etching uses controlled chemical machining to form metal components, avoiding the mechanical stresses associated with stamping lead  tight tolerances and consistent geometry, all critical in miniature electronic assemblies. That capability matters most during development. New relay designs often involve multiple iterations before the correct   or the need to reduce printed circuit board (PCB) footprint.


Chemical etching supports this need by enabling fast turnaround and low-cost  without committing to expensive press tools too early.


As designs move from development into production, the emphasis then moves  Micro’s manufacturing relies on automated inspection, where dimensional accuracy and visual uniformity is essential. At this stage, even small variations can disrupt throughput. Chemical etching provides the process stability


 to volume manufacture, otherwise, the   far-reaching.


Pickering Electronics operates as part of a wider group supplying relays, test and  solutions. This means that disruption in one 


Pushing the limits of miniaturisation This capability of chemical etching is best illustrated by one of Pickering’s latest product launches, the aforementioned ultra-


miniature two-pole reed relay measuring just 5 mm × 5 mm and 15.5 mm in height. Integrating multiple etched lead frames into such a compact assembly took around two years of development, resulting in what’s described as the world’s smallest relay of its type.


Reaching this level of miniaturisation was not a single step, but the result of a manufacturing approach that has evolved over time. Like any manufacturing partnership, especially one that goes beyond 30 years, processes have adapted alongside  production methods.


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MARCH 2026 | ELECTRONICS FOR ENGINEERS 13


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