Connector Selection for PCB Assemblies Why Connectors Decide Reliability A connector is often the component most likely to fail in a product, because it carries the mechanical loads as well as the signals. It is mated and unmated, it is pulled and bent, it is exposed to the environment, and…

SMT Reflow Solder Joint Ball Pull: Pulling the Ball Upward Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. The same discipline applies to SMT Reflow Solder Joint…

Heatsink Attachment and Thermal Interface The Thermal Path Heat leaves a component through a chain of materials, and the weakest link decides the temperature. From the die the heat travels through the package, through the interface between the package and the heatsink, into the heatsink and then to the air.…

PCB Solder Mask Thickness Uniformity: Design, Process, and Quality Notes Buyers and engineers often focus on the finished product and forget the production line behind it. In practice, most field failures can be traced back to process decisions made during assembly. Understanding PCB solder mask thickness uniformity gives you a…

Potting and Encapsulation of Assemblies Why Pot a Board Potting and encapsulation surround the assembly with a polymer so that the electrical function is protected from the environment. The reasons are mechanical, chemical and electrical: to protect against moisture, dust, salt and chemicals; to resist vibration and shock; to prevent…

SMT Component Feeder Calibration: A Practical Manufacturing Guide Modern electronics depend on boards that are assembled correctly the first time. Every product – a phone, a charger, a medical instrument or an industrial controller – relies on thousands of solder joints that must conduct current for years. This article explains…

Solder Paste Inspection and Deposit Volume What SPI Measures Solder paste inspection measures the paste that has just been printed, before any component is placed. A laser or camera system scans the board and reports the volume, area, height and position of every deposit, comparing each against the stencil’s intent.…

Automated Optical Inspection in SMT What AOI Does Automated optical inspection uses a camera and software to compare what is on the board with what the program expects. It checks that each component is present, that it is in the right position and orientation, that the solder joints have the…

PCB Copper Trace Electromagnetic Interference: The Noise That Escapes Modern electronics depend on boards that are assembled correctly the first time. Every product – a phone, a charger, a medical instrument or an industrial controller – relies on thousands of solder joints that must conduct current for years. This article…

Feeder Setup and Verification on SMT Lines Why Feeders Cause So Many Defects Most wrong part defects and a large share of placement defects begin at the feeder. The tape and the reel carry the components, the feeder presents them to the nozzle, and a number of things can go…