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What Is a PCB Legend?

What Is a PCB Legend? A PCB legend is a layer of text placed on a printed circuit board (PCB) to label components and provide other useful information. Sometimes called silkscreen or component identification, legend text is printed on top of the circuit board’s solder mask as one of the last steps in the circuit board manufacturing process. Though a PCB may not technically require a legend to function, this text provides information that’s vital for assembly, testing and troubleshooting by the end user. Some common pieces of information included in a PCB legend include: Reference indicators labeling component types Polarity indicators labeling the polarity of certain components Component outlines indicating where components should go Test points to assist with testing and troubleshooting Manufacturer information, serial numbers and other labeling By indicating proper orientation and placement of components and providing other information about the circuit board, a legend helps ensure

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Rigid PCB vs. Flexible PCB

Rigid PCB vs. Flexible PCB Both rigid and flexible printed circuit boards (PCBs) serve to connect electronic components in various consumer and non-consumer devices. As the names suggest, a rigid PCB is a circuit board built on a rigid base layer that cannot bend, while a flexible PCB, also called a flex circuit, is built on a flexible base capable of bending, twisting and folding. Though traditional and flexible PCBs both fulfill the same basic purpose, it’s important to note that they have many differences. Flexible circuits are more than just PCBs that bend — they’re manufactured differently from rigid PCBs and offer various performance benefits and drawbacks. Learn more about the properties of rigid PCBs versus flexible PCBs below. How Are Rigid PCBs and Flex Circuits Different? A rigid PCB, usually known simply as a PCB, is what most people think of when they imagine a circuit board. These

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PCB Lead-Free Regulations

PCB Lead-Free Regulations Until recently, lead was almost ubiquitous in the construction of printed circuit boards (PCBs). Due to its melting point and ability to form strong bonds between surfaces, a eutectic lead-tin alloy proved highly effective as a solder material. However, as electronic waste volumes increased, the use of lead in circuit boards came under scrutiny in Europe and elsewhere. Lead is a toxic material known to cause serious health and developmental problems in humans and animals. Though electronics containing lead may not pose major threats while in the hands of consumers, lead can leak into the environment after devices are discarded in landfills. To prevent excess amounts of lead from entering the ground, water and air, several governments have placed restrictions on the use of lead in printed circuit boards. What Regulations Control the Use of Lead in PCBs? Two main regulations control the use of lead in

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How Different Technologies Affect the PCB Cost

Jump To: Factors That Affect PCB Cost | Material Choice | PCB Size | Numbers of Layers | Finish (ENIG, HASL, etc.) | Size of Hole | Minimum Trace and Space | The Thickness and Aspect Ratio | Custom or Unique Specifications | PCB of Different Designs How Different Technologies Affect the PCB Cost PCB technologies involve high levels of intricacy. Depending on the design of a circuit board, its production could be more or less costly than the average PCB. If a PCB is intended for an everyday conventional item, the cost to manufacture the board itself should be significantly lower than the price of a board designed for high-tech machinery. Factors That Affect PCB Cost The three factors that most impact PCB manufacturing cost breakdown are the type of material, the size of the board and the number of layers. Other factors that can also impact price include the finish and the size of the holes, including these eight. 1. Material Choice The materials used in

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PCB Glossary

  • Array

    A group of elements or circuits (or circuit boards) arranged in rows and columns on a base material.