ByteSnap Design guide tackles the engineering trade-offs behind PCB miniaturisation

As products get smaller and component density rises, decisions made before PCB layout can determine whether a design succeeds in manufacture and compliance testing.

ByteSnap Design is putting the engineering challenges of PCB miniaturisation under the spotlight at this year’s Engineering Design Show (EDS), with a new technical guide and live demonstration showing what it takes to reduce PCB footprint while retaining functionality.

ByteSnap Design’s newly published “Managing heat, microvias and EMC when shrinking embedded boards” explores what changes electrically and thermally as PCB area is reduced. Less board space means less copper for heat spreading and clean return paths, while bringing high-speed, RF and sensitive analogue circuitry closer together can introduce EMC and signal integrity problems that were negligible in a larger design.

The guide looks at how engineers can address those constraints in practice, from thermal via arrays, heavier internal copper and careful component placement to HDI techniques using laser-drilled microvias. It also examines the manufacturing and commercial consequences of increasing board density, including assembly yield, the higher fabrication cost of HDI and whether those costs can be offset elsewhere through smaller enclosures, reduced material requirements and lower shipping volumes.

On stand H52, ByteSnap Design will explore the trade-offs that emerge as boards become smaller, from thermal management and EMC to HDI routing, manufacturability and cost. The Birmingham-based embedded systems and electronic product design consultancy will display three generations of its controller design side by side, showing how the board has progressively reduced in size. The latest miniaturised version will also be put to work, powering a model locomotive around a live railway. The working train and track have been provided for the show by a specialist model railway manufacturer.

A separate 3D-printed locomotive with a removable roof will allow visitors to examine the miniaturised controller up close and see how the board fits within the space available.

“Miniaturisation gets talked about as if it’s just a matter of picking smaller parts,” said Dunstan Power, Co-founder and Director at ByteSnap Design. “It isn’t. Every board on that stand had to solve real thermal, EMC and manufacturing problems to get smaller without giving anything up, and we wanted a demo people could actually see running, not just read about.”

Dunstan Power will also take the stage at EDS to ask: “What’s the Point of Engineers in a World of AI? Why Human-Centric Engineering Still Matters”. His presentation will examine where AI genuinely helps electronic product development, where it can fail with total confidence, and what that means for engineering teams over the next five to ten years.

Taking place at 12 pm on 7 October in the Engineer Theatre, the talk will draw on findings from ByteSnap Design’s third annual industry survey, “AI in Electronics: What Makes the Cut?”, which captures AI adoption among electronic design professionals.

Image Source: ByteSnap Design