Glossary & Terminology PCB Manufacturing QualiEco Canada

Glossary and Abbreviations - PCB Glossary

Click on an alphabet below to directly jump to the chosen alphabet section...

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Alphabet R

RatsnestA bunch of straight lines (unrouted connections) between pins which represents graphically the connectivity of a PCB CAD database.
Reference DesignatorThe name of components on a printed circuit by convention beginning with one or two letters followed by a numeric value. The letter designates the class of component; e.g. "Q" is commonly used as a prefix for transistors. Reference designators appear as usually white or yellow epoxy ink (the "silkscreen") on a circuit board. They are placed close to their respective components but not underneath them. So that they are visible on the assembled board.
Reference DimensionA dimension without a tolerance that is used only for informational purposes that does not govern inspection or other manufacturing operations.
RegistrationThe degree of conformity to the position of a pattern, or a portion thereof, a hole or other feature to its intended position on a product.
Readme FileA text file included in the zip file, which provides necessary information needed to manufacture your order. Phone numbers or email addresses of designer or engineer contacts for this project should be included to expedite resolution of any potential manufacturing problems that could delay your order.
Reflow ovenBoards pass through an oven in which the solder paste was deposited earlier.
Reflow SolderingMelting, joining and solidification of two coated metal layers by application of heat to the surface and predeposited solder paste.
ResistCoating material used to mask or to protect selected areas of a pattern from the action of an etchant, solder, or plating.
Resin (Epoxy) SmearResin transferred from the base material onto the surface of the conductive pattern in the wall of a drilled hole.
Rigid-flexA PCB construction combining flexible circuits and rigid multi-layers usually to provide a built-in connection or to make a three-dimension form that includes components.
RevisionIf you have the same drawing number but updated revisions, please enter it here. This will avoid any confusion for manufacturing your desired boards. Please make sure that your revision number is included with your drawings.
RF (radio frequency) and wireless designA circuit design that operates in a range of electromagnetic frequencies above the audio range and below visible light. All broadcast transmission, from AM radio to satellites, falls into this range, which is between 30KHz and 300GHz.
RoHSRestriction of Hazardous Substances is one of a handful of European legislation intended to eliminate or severely curtail the use of cadmium, hexavalent chromium, and lead in all products from automobiles to consumer electronics.
RoHS Compliant PCBPCB boards that are processed under RoHS regulations.
Route (or Track): A layout or wiring of an electrical connection.
RouterA machine that cuts away portions of the laminate to form the desired shape and size of the printed board.

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