A solder bridge is formed when two points on the circuit board that should not be electrically connected are inadvertently connected by solder during PCB soldering. Of the many problems caused by smaller and smaller components, solder bridging takes the top of the list. Nasty solder bridges – through-hole and surface mount Solder joint quality for through-hole components Similarly, good SMD solder joints have smooth, concave fillets as well. It can beĪchieved when the soldering iron is at the right temperature, with the oxide Horizontal, which looks just like the shape of a Hershey’s kiss. Smooth and shiny concave surface at an angle of 40 to 70 degrees from the Solder joint for through-hole components is a “concave fillet”, which has a The Ideal Through-hole Solder Joint – It’s like a Hershey’s Solder defects, it’s helpful to have an image of an ideal solder joint forĬomparison.
Here’s a guide to help you discern what’s good and what’s not, so that you may be sure to avoid these soldering issues for your home projects, or just to be able to do a quality assessment on assembled PCBs received from a third party. The soldering must be reliable and ensure electrical conductivity This is not only a guarantee for the product’s function but also to prevent the product from being burned out by a short circuit.Īnd if your PCB is going to be used for an important application, it will be more important than ever to know what a good solder joint looks like.Ĭomponents are getting smaller and smaller….The solder joints must have sufficient mechanical strength to prevent the soldered parts from falling off or loose under vibration or impact.When soldering the PCB, try to make the finished product have the following characteristics: With components becoming smaller and more compact, the chances of soldering issues occurring have become higher. It can be a fun activity for beginners to try out and with enough practice, it is an easy skill to pick up.Īlthough it is possible for anyone to throw down solder onto PCBs, whether you get classy solder joints or downright caveman quality ones is a different matter altogether. Hand soldering has always been considered a hallmark skill to have in every electronics maker’s repertoire of geeky skills.
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