PCB Card Edge Connector Wear: A Factory-Floor Review 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 card edge connector wear gives you a practical advantage…

PCB Via Structures: Through, Blind, Buried and Microvia A Hole Is Not Just a Hole Almost every net on a multi layer board changes layers at least once, and every one of those transitions is a hole. The shape of that hole decides how much routing space it consumes, how…

PCB Mezzanine Connector Tolerance: Practical Process Controls 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 PCB…

PCB Solder Mask Color Options and What They Cost More Than a Paint Job Solder mask is a photoimageable epoxy coating that sits over the copper, opening only at the pads. It stops solder from bridging between adjacent pads, keeps the copper from oxidising, raises surface insulation resistance and protects…

PCB Board to Board Connector Alignment: Lining Two Boards Up 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 board to board connector alignment from the perspective of…

PCB Plating Thickness Guide: Copper, Nickel and Gold Three Metals, Three Jobs Plating thickness is one of the few numbers on a fabrication drawing that reaches into electrical performance, mechanical life and cost at the same time. Copper carries current and holds the barrel together, nickel stops copper from diffusing…

PCB Wire Harness Strain Relief: Taking the Pull Off the Joint 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.…

Impedance Discontinuity in PCB Manufacturing: Causes and Fixes What an Impedance Discontinuity Really Is Every high speed net carries a target impedance: 50 or 75 ohm single ended for most RF and clock nets, 90 ohm for USB, 100 ohm for PCIe, HDMI and differential pairs, 120 ohm for some…

PCB Keying and Polarization: A Practical Manufacturing Guide 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 keying and polarization from the perspective of a PCBA factory floor,…

PCB Connector Pin Assignment: Giving Every Pin a Job 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…