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Look closely at almost any complex printed circuit board (PCB), and you’ll spot a dense row of components marked with a single “0” or “000”. At first glance, it feels like a contradiction. A resistor’s entire job is to restrict current flow. So what is the point of a resistor that offers virtually no resistance? […]
The layout of the power section is far more than just connecting the chip and running the caps over. How close the input and output capacitors sit to the pins, how the ground return runs, how much copper you leave for the switch node, which side you take the feedback sample from — these details […]
Last Wednesday afternoon, I had a technical sync with a customer who builds servers. The board was 16 layers, 3.2 mm thick, main signals at 25G, with a few pairs running 56G. About halfway through, the SI engineer on the other side put the simulation plot on the screen and asked: for these vias that […]
Many engineers, when laying out a board, put all their attention on trace width, stackup, and impedance. But have you ever wondered one thing: why do PCB factories default to giving you 1 oz copper? If you switch to 2 oz, what exactly changes on the board? This isn’t a “thicker is better” parameter contest. […]
A few years ago, a quality incident occurred on the production line, offering a profoundly sobering lesson. A batch of PCBs with 0.4mm-pitch QFP components appeared normal during visual inspection immediately after passing through the stencil printer, yet two hours later, they all failed functional testing. Subsequent teardown analysis revealed that the component leads were […]
Thinking back, we’ve been burned before. Back in 2012 our shop took an overseas order; we asked the customer what their requirements were, and in the end we shipped the PCBA over, and the customer came back holding the IPC-A-610 standard telling us a third of the solder joints failed. Was it that our capability […]
A PCBA box build takes a finished circuit board and turns it into a product you can ship. Short answer: a box build — also called systems integration — mounts the PCBA in an enclosure, adds wiring, power, displays, and firmware, then runs a full functional test so the unit leaves the line ready to […]
A board passes design review. The paste prints, and a 0.4 mm QFP bridges on three pins. The QFN center pad traps flux gas and voids at 35 percent. None of this shows up in the schematic. It starts at the steel sheet that lays down the solder. SMT stencil design is the discipline that […]
DYC Electronic est une entreprise professionnelle de R&D et de production, spécialisée dans la production de PCBA, SMT, plugins, post-soudure, tests, assemblage de produits, production de fils et de connecteurs, ainsi que dans le traitement unique des décodeurs réseau, du transport ferroviaire, de la communication, de l'électronique automobile, de l'intelligence énergétique, de l'automatisation industrielle, de la médecine, de la finance, de la sécurité et de la maison intelligente.
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