MEDICAL ELECTRONICS


Building the impossible:


How micro 3D printing is engineering the next frontier in medical electronics


By Laura Galloway, director of marketing at Boston Micro Fabrication As electronics shrink and clinical expectations rise, traditional manufacturing methods are struggling to keep pace.


T


he distal tip of a single-use ureteroscope is smaller than a grain of rice. Inside it, engineers must house a camera chip and an illumination source, contain and seal both elements with a high degree of precision, integrate irrigation channels and seal the entire assembly against fl uid ingress - all within a diameter of just 3.302 mm. That profi le demands complex 3D geometry, tight tolerances and wall thicknesses that push traditional production processes to their absolute limits. It is a precise, unforgiving constraint and it is far from unique. Medical electronics engineering operates at an exceptionally demanding intersection of disciplines, where shrinking electronic subsystems must coexist with fl uidics, optics and biocompatible interfaces within millimetre-scale packages. Signal integrity, thermal management, electromagnetic compatibility and fl uid handling must all be resolved in concert - constraints that, taken together, expose the functional limits of conventional production processes. The paradox is clear: devices keep shrinking, yet the functionality packed inside them keeps growing.


Micro-precision 3D printing is emerging as a 30


compelling solution – one capable of closing this gap.


The pressures shaping modern medical electronics


The most visible force shaping medical electronics manufacturing is miniaturisation, and it is accelerating. As devices, optics and photonics continue to shrink, every electronic element inside them must follow: cameras, sensors, antennas, brackets and holders alike. In many cases, this is not simply a market preference but a physical imperative. Next- generation communications infrastructure, for instance, demands that antennas operating at 6G and 7G frequencies become physically smaller — and every surrounding component must scale accordingly. In this environment, features measured in tens of microns are no longer exceptional; they are the baseline. Alongside miniaturisation sits a further layer of complexity: biocompatibility and material qualifi cation requirements. Any component intended for bodily contact must employ validated materials, yet while material suppliers can certify a resin’s biocompatibility, the device OEM retains full responsibility for qualifying the fi nal design within its specifi c


JULY/AUGUST 2026 | ELECTRONICS FOR ENGINEERS


clinical context. Every design iteration must be traceable, repeatable and defensible under regulatory scrutiny. It is a process that is both application-specifi c and time-intensive, and one that makes early-stage manufacturing decisions consequential well beyond the prototyping phase.


Beneath both of these pressures lies a third constraint, which, although less discussed but equally consequential, compounds both: producing precise, complex structures at low or early-stage production volumes. Many medical electronic parts ship in the tens of thousands per year, not the hundreds of millions. That band is structurally awkward; it’s too small to justify the capital investment of high-precision tooling, yet too demanding to tolerate imprecise or non- representative prototyping. Producing exact, geometrically complex structures without an economic penalty at those volumes is the manufacturing gap that has quietly constrained innovation for years. Which raises the question: why haven’t existing processes closed it?


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