This post might be boarding, but not shocking. The first thing we need to do is provide context; Why do nearly all electronic gadgets have PCB boards?
Let’s step back a little here and ask a more fundamental question: What do electronic devices do? They move electricity between components. What is so wrong with wires? Nothing, but a core principle here is scale and automation, and consequent to those ideas, delivering verifiable quality at scale.
At root a PCB board is wiring frozen into copper and fibreglass. It is more of a map than a board, especially these days, when we tend to layer and sandwich boards together into smaller spaces. The key thing a board does is to provide a base to build from, a solid grounded foundation, if you will. “A PCB is the moment an idea stops being abstract and starts being physically true.”
So, if these little guys are the core of most systems, why are they and their accomplice, the peripheral, the cause of most electronic unit failures?
The myth: “If it powers on, the PCB is fine”
This is the single most expensive misconception in electronics. A board can power up, pass a bench test, even ship …and still be fundamentally unstable. Because many PCB problems are marginal, environmental, time-dependent. They only appear when temperature changes, loads fluctuate, EMI (Electromagnetic interference) shows up, humidity creeps in, supply voltage sags or production tolerances stack. A PCB that “mostly works” is a future warranty claim.
Silent killers (the 80%)
Here are the failure classes that dominate the field. Heat paths that exist only on paper, thermal reliefs everywhere, no real copper mass, poor via stitching, components “technically” in spec. but not fit for purpose. The result is hotspots, accelerated aging and the beginning of intermittent failure, after months instead of years. Electronics don’t usually burn out, they fade away, one glitch at a time. Devices drop and fall, they experience different environmental conditions, they collect dust. Like human aging the damage over time is cumulative.
Cutting costs (the 20%)
There is a simple calculus that exists in the real world of electronic deployments. It begins with the idea that you cannot mitigate and plan for all eventualities. It ends with cost decisions. Copper is expensive, design time and rework kill your margin. Most companies base their calculus on human nature, not economics. How many purchasers will take the time to complain, especially if we cleverly route them through an offshore call center first? The issue here is the “scale” of a bad decision, not accountability and scapegoating, but that is an entirely different process “engineering” topic.
IoT PCBs | Tough Calls
IoT has a difficult context here. If you’re a company like ours, working in a niche market, your reputation hinges on timely delivery and rollout. The operational environments are harsh, climate always changes, modules are power heavy, and we have to guarantee uptime (even in remote regions). Software senseis will never tell you this, but “The Cloud” cannot fix a bad ground game.
So, what do we do about it? We build for extremes. We know the weak points in electronic systems based on years of fieldwork. We work with customers to build in the functionality they need, not the whiz bang brilliant idea they initially built their requirements document on. An important point: Complexity kills scalability. This takes a certain amount of straight talking, a lot of technical expertise and a touch of empathy. Empathy electronics and politically correct PCBs – an idea that could catch on.
