Knownpcb @knownpcb

A clean-looking PCBA doesn't guarantee healthy hidden joints. X-Ray can reveal BGA voiding and bridging, but a single 2D view may not confirm every open joint. Inspection is about combining evidence—not trusting one image. What defect is hardest for your team to diagnose?

FR-4 is a solid default—but not for every PCB. Heat, RF loss and cost can point you toward metal-core, low-loss RF laminates or a hybrid stack-up. Start with the design requirements, not the material name.

A perfect PCB prototype doesn’t prove a supplier is ready for mass production. The real test is repeatability: stack-up, copper control, impedance, internal quality and inspection coverage. 1 good board or 1,000 consistent boards — which tells you more about the supplier?

0 DRC errors ≠ 0 production risks. A PCB can pass DRC and still have issues with: • power-current capacity • thermal paths • creepage/clearance • copper balance • assembly spacing • test access • production files DRC validates rules. DFM validates reality.

A complete guide to PCB Prototype Service and Prototype PCB Assembly | KnownPCB knownpcb.com/post/guide-to-…

Conformal coating isn’t a default checkbox. Start with the end-use environment, then choose the chemistry and process. Define keep-outs for connectors, test points and switches. The ROI test: coating cost vs field failures, warranty returns and downtime.

Same symptom: a dead circuit. Very different physics. Which failure signature is the easiest to diagnose? Components were intentionally overstressed. Do not recreate.

Can full automation handle every PCBA? Not always. Some through-hole parts still need manual placement before wave soldering. In PCBA production: • placement matters • orientation matters • fit matters • automation and manual work often work together

More GND names ≠ better grounding. In PCB layout, return-current paths matter more than labels. Don’t split blindly. Don’t float guards. Don’t force star grounding. Which rule is most misunderstood?

SMT machines create speed. In PCB assembly, stable SMT production depends on placement program checks, feeder setup, SOP control, first article inspection, and fast abnormal response. Machines improve efficiency. But people help keep the process under control.

SMT machines create speed. People help protect yield. In PCB assembly, stable SMT production depends on placement program checks, feeder setup, SOP control, first article inspection, and fast abnormal response. Machines improve efficiency. Learn more: knownpcb.com

Before trusting a PCBA supplier, ask for more than the final inspection result. 4 reflow records worth checking: 1️⃣Project-specific reflow profile 2️⃣Hot/cold spot verification 3️⃣Solder paste + MSL logs 4️⃣FAI + anomaly records

5 PCB footprint mistakes that can ruin assembly: 1️⃣Wrong pad size or spacing 2️⃣Wrong Pin 1 / polarity marking 3️⃣Insufficient solder mask dam 4️⃣Wrong package footprint selection 5️⃣Poor thermal pad or thermal via design Small footprint errors can become real PCBA failures.

PCBA inspection before shipment. AOI helps check visible assembly details: • solder joints • component placement • polarity • surface defects Manual review still matters for key areas that need extra confirmation. Small details can affect product reliability.

Battery holder PCBA hand soldering. Battery holders and contact terminals need secure solder joints for stable electrical connection. Small solder joints can affect product reliability. What do you check first on a PCBA — solder joints, components, or board cleanliness?

The cheapest PCBA quote is not always the lowest cost. Rework, delays, lower yield, and unstable performance can cost much more later. In PCB assembly, process control matters as much as price. Compare the process behind the quote. #PCB #PCBA

MOSFET area getting hot? Don’t only check current rating. Gate drive, RDS(on), conduction loss, switching loss, PCB thermal path, current loop layout, and load condition can all matter. Power PCB heating is often a system-level issue.

A 10A current-sense PCB is not just a layout task. Copper thickness, temperature rise, Kelvin sensing, ADC layout, test points and calibration all affect accuracy and production stability. Read more： knownpcb.com/post/10a-batte…

Capacitor placement on a PCB is not random. Decoupling caps: fast + local support near IC power pins. Bulk caps: wider power rail support near inputs, regulators, or major loads. It’s not just size — it’s response speed and placement.

A clean solder joint doesn’t always mean a reliable PCBA. In PCBA manufacturing, reliability is built through process control — SMT, AOI, functional testing, and final inspection. Step by step, before it reaches the customer. #PCB #PCBA #SMT #KnownPCB