PCB Barcode Marking: A Mark a Machine Can Read 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 Humidity Control in Assembly: Dry Air in the Room 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 humidity control in assembly from the perspective of a…

PCB Anti Static Workbench Setup: Preparing the Bench 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 anti static workbench setup from the perspective of a PCBA factory…

PCB Panel Label and Bagging: Ending the Build 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 panel label and bagging from the perspective of a PCBA factory…

Halogen-Free PCB vs FR-4: What Actually Differs The two terms appear side by side on quotations and specifications so often that they are taken to be alternatives: a board is either FR-4 or halogen-free. It is a category error. One describes a family of base materials, and the other describes…

Why Impedance Drops After Solder Mask A controlled impedance board arrives from the fabricator with a test report showing the coupon measured exactly on target. Then the same structure is measured again after solder mask is applied, and the impedance reads lower than the design value. Nothing about the copper…

PCB Copper Thickness Selection: 1oz, 2oz and Heavy Copper Copper thickness is one of the few board parameters that changes both the electrical and the mechanical behaviour of a design at the same time, and it is chosen far earlier than most engineers realise. Once the laminate is ordered, the…

PCB Fabrication Notes: The Complete Checklist Every fabricated board carries a set of notes that the designer writes and the shop reads, and the difference between a smooth build and a week of questions is usually decided by how complete those notes are. The list below is the one that…

The 3W Rule and Crosstalk: What It Does Not Solve Few layout rules are as widely quoted and as widely misused as the 3W principle. Set the rule, run the design rule check, and the crosstalk problem is assumed to be solved. On a short, slow net that is often…

Camera PCB Price Guide: 4-Layer to HDI Imaging Boards A camera module is a sensor, a lens and a very dense board in a very small space, and that density is what drives the cost. The image sensor needs a fine-pitch interface, the processor needs impedance-controlled connections to memory, and…