PCB Dictionary – Glossary of Terms and Meaning in PCB Manufacturing and Assembly
Glossary of Terms and Meaning used in PCB Manufacturing
This PCB Dictionary is Glossary of Terms and Meaning used in PCB Manufacturing and PCB Assembly Industry. Students and Teachers of Science and Electronics will find this PCB Dictionary very Useful.
PCB Dictionary – Glossary of Terms and Meaning used in PCB Manufacturing
Active electronic components are those that can control the flow of electricity. Different Types of Printed Circuit Boards have at least one active component. Some examples of active electronic components are transistor, vacuum tubes, silicon-controlled rectifiers (SCRs).
The copper ring that connects to thru-hole wall of the Printed Circuit Board. In simple terms, it Annular Ring is the width of the conductor pad surrounding a drilled hole on any PCB.
The supporting plane in a Printed Circuit Board that provides insulation.
A Drilling process applied in Multilayer PCB Manufacturing to drill off stub between layers with no via from the back. This to ensures signal integrity.
An angled edge of a PCB for gold fingers.
in PCB Dictionary, BGA stands for Ball Grid Array. It is a Type of SMD Electronic Component no leads. This type of surface-mount packaging is used in Surface Mount Technology (SMT) and utilizes an array of metal spheres called solder balls for electrical interconnection. Solder balls are attached to a laminated substrate at the bottom of the package.
The conductive surface hole that connects an outer layer with an inner layer of a Multilayer PCB.
A via hole that does not extend to the surface of the Printed Circuit Board.
Computer Aided Design (CAD) is a software tool to design a PCB and create data to manufacture and assemble Printed Circuit Boards.
Computer Aided Manufacturing (CAM) refers PCB Manufacturing Process with the help of Computer Software and files.
Files that provide information for PCB Manufacturing.
A type of liquid heat curing conductive carbon paste added to the pad surface.
Holes that are drilled but cut half at the edge with copper on wall of the hole.
Rounded Corner of a PCB to eliminate sharp edge.
In PCB Dictionary, Chip-on-Board is a type of Surface Mount Technology (SMT) to Mounting Chip / IC directly on a PCB.
The base copper sheet or clad on a PCB.
A groove that is dug on a PCB.
A connector on the edge of a PCB substrate to connect other circuit boards or electronic device.
ESD stands for Electrostatic Discharge. It can be defined as transfer of electric charge between two different objects charged to different electric potentials.
Chemically removing unwanted copper from a PCB to get the desired circuit pattern or copper track.
External Layer or Outer Later of a PCB where Electronic Components are Soldered.
Fiducial is an etched feature or drilled hole used for optical alignment during PCB Assembly Process.
SMD packages with very fine pitch and larger number of leads are called fine pitch package. Quad flat pack (QFP) and shrink quad flat pack (SQFP) are examples of fine pitch package. Fine pitch packages have thinner leads and require a thinner land pattern design.
Flex PCB or Flexible PCB
The substrate of a flexible board is made of flexible plastic (thin insulating polymer film), polyimide or a similar polymer or Kapton. Conductive copper circuit is printed on this substrate and a protection coating of thin polymer is applied to protect the circuits.
A sign for rating flame resistant material. FR4 rating specifies that resin PCB Material is capable of automatically extinguishing if it comes under flame.
Data file used to control photoplotter.
Edge Connectors of a PCB after gold plating.
High Density Interconnector (HDI) is a type of PCB fabrication technology.
A hole that is partially surrounded by the land.
Inner Layers of a Multilayer PCB.
The distance between two adjacent conductors or traces on a Printed Circuit Board.
The width of conductors or traces on a Printed Circuit Board.
Metal Core PCB
Metal Core PCB or Metal Base PCB or MC PCB are Printed Circuit Boards with core material as metal, such as copper or aluminum.
Microvias are holes or vias are laser-created vary small vias.
Passive electronic components are those that don’t have the ability to control electric current by means of another electrical signal. Examples of passive electronic components are capacitor, resistor, inductor, transformer, and diode. Read: Active and Passive Electronic Components
A PCB manufacturing process by combining different boards into one panel to increase the manufacturing efficiency.
Selective plating of a conductive pattern.
Peelable Solder Mask
A layer of solder mask that can be peeled OFF from the board.
A circuit board prior to assembly of electronic components is known as PCB. Once electronic components are soldered, the board is called Printed Circuit Assembly (PCA) or Printed Circuit Board Assembly (PCBA) or PCB Assembly.
PCB Assembly Drawing
Drawing that describes the requirements of a PCB Assembly.
PCB Assembly House
Factory of a PCB Manufacturing Company for PCB Assembly.
A factory that fabricates PCB.
A Sample of the Main PCB prior to full-scale manufacturing of boards for end products.
The process of producing fully cured laminated sheets by applying heat and pressure to a book.
Press Fit Holes
Holes on a PCB through which a contact terminal can be pressed into the board.
Woven glass material with excellent electrical and mechanical properties.
Plated Through-Hole (PTH) are copper plated holes on a PCB for conducting interconnection.
Rigid Flex PCB or rigid-flex PCB is Circuit Board with combination of flexible PCB and rigid PCB.
RoHS stands for Restriction of Hazardous Substances. A European Union (EU) directive and restricts the use of specific hazardous materials found in electrical and electronic products.
The first step of a PCB design. It includes graphical circuit symbols of the electrical connections and functions of the printed circuit board.
Text-based, human-readable information printed on a PCB for component placement.
Solder Mask Over Bare Copper (SMOBC) is a method of fabricating PCBs with the final metallization being copper and no other protective metal.
An unintended electrical connection between two conductors by means of a small blob of solder.
A coating applied to a circuit board to prevent deposit of solder.
The base material for PCB fabrication.
A protection layer attached to copper foil to avoid oxidation of PCB.
A sample test method used for testing to verify certain quality parameters without damaging the actual circuit board.
A via or hole of a PCB with dry film solder mask completely covering both its pad and plated-thru hole.
V-scoring or V-cut is incomplete cut off in a PCB generally done for ease to separate PCB panel.
Via Filled with Resin
A via or hole filled with resin is a through hole with no dent on the surface of the board so that soldering is not affected.
Via in Pad
Thru hole on the pad of Multilayer PCB.
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