Solder Ball Placement in Small-Batch SMT Assembly Small-batch SMT assembly rarely stops at one reflow. Boards that combine a fine-pitch package with an odd-form module, or that mix a consumer sensor with an industrial interface, often need a second assembly operation after the main build. Solder ball placement gives that…

PCB Return Loss Specification: What the Link Can Tolerate 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…

PCB S Parameter Measurement Setup: Describing the Board with Numbers 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 S parameter measurement setup gives you a…

Impedance Control: The Fabrication Capability Behind It Impedance control is usually discussed as a design problem, yet most out-of-spec measurements trace back to fabrication variables rather than to the layout. A trace drawn 0.15 mm wide on the Gerber is not 0.15 mm after etching and plating; it is whatever…

Debugging Power Supply Noise and Clock Coupling in Measurement Circuits Precision analog circuits fail in ways that a schematic review will never reveal. A 16 bit measurement channel can meet every specification on paper and still return noisy data, because the noise enters through the power pins, through a clock…

How to Reduce PCB Prototype Lead Time with Better DFM Planning Prototype lead time is seldom limited by the imaging and etching steps themselves. On a first-article build, most of the calendar time disappears into incomplete data, late stackup decisions and questions that travel back and forth between designer and…

PCB VSWR Measurement on A Board: How Much Comes Back Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB VSWR measurement on a board from the perspective of…

PCB Impedance Matching Network Tuning: Making the Parts Fit Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB impedance matching network tuning from the perspective of a PCBA…

PCB Balun Implementation on Board: From Unbalanced to Balanced Electronics manufacturing has become a discipline of small details. Solder paste volumes, placement accuracy, temperature profiles and inspection limits all add up to the final result. This guide looks at PCB balun implementation on board from the perspective of a PCBA…

PCB Directional Coupler Design: Taking a Sample of the Power 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 directional coupler design gives you a practical…