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PCB Terms And Abbreviations

To simplify communication in the PCB industry, many technical terms and abbreviations have been defined by the international industry. For faster and smoother communication with you, JHDPCB hereby provides a list of technical terms and abbreviations and their explanations.

Terms and Abbreviations

Definition Short Description
BARE BOARD TESTING Electrical Testing of the non-populated PCB.
BLIND and BURIED VIA HOLES A Blind Via connects an Outer Layer to one or more Inner Layers but does not go through the entire board. A Buried Via connects two or more Inner Layers but does not go through to an Outer Layer.
BOARD PRICE The price includes the price for the PCB’s selected in the calculator
BOARD SURFACE The board surface area expressed in dm².
BOARD THICKNESS The thickness given in mm based on the base materials used including copper foil.
BOTTOM Bottom side of the PCB.
BUILDUP Defined build of a PCB such as number of layers an their sequence.
CARBON CONTACTS Carbon Ink normally used for keyboard contacts, LCD contacts and jumpers.
CHAMFERED MECHANICAL or COUNTERSUNK HOLES A beveled edge of a holes usually at 45 degrees.
COPPER FOIL Copper Foils is the base copper thickness applied on OUTER and INNER layers.
Che Ni/Au or ENIG (Electroless Nickel Immersion Gold) ENIG, Electro less Nickel Immersion Gold, also called Che Ni/Au, chemical nickel gold or also known as soft gold.
CORE A rigid base material laminate with copper on one or two sides.
COPPER UP TO THE BOARD EDGE Copper is placed up to the very edge of the Board Contour.
Cu Cu is the chemical abbreviation for Copper
DELIVERY TERM Number of days required to manufacture.
DELIVERY FORMAT The method in which you ask Eurocircuits to produce and delivery your PCB design.
eC REGISTRATION COMPATIBLE PCB’s or Customer Panels that have the necessary Tooling Holes to be used with the Eurocircuits eC-stencil-mate or eC-stencil-fix equipment.
DEPTH ROUTING Removing a specific area of the Outer Layer of the PCB to a specific depth.
EDGE CONNECTOR BEVELING Reduce the square edge of the connector to a sloping edge to ease entry in to the socket.
EDGE CONNECTOR GOLD SURFACE A layer of gold plated to the fingers of the Edge Connector.
EXTRA PRESS CYCLES When producing Multi-layers with Blind and Buried Via Holes, additional Press Cycles may be required.
FIDUCIAL An Optical target.
EXTRA PTH RUN When producing multilayers with Blind and Buried Via Holes, the panel may need to pass through the galvanic Plating process multiple times.
FINISHED HOLE SIZE The finished hole size or ENDHOLE is the diameter that the PCB designer specifies in his PCB layout.
GROSS PRICE The price including VAT
FR4 Fiberglass reinforced epoxy laminates that are Flame Retardant.
HAL Hot Air Leveling Lead Free Tin (Sn)
HOLE DENSITY The number of holes per dm² of the board surface.
HEATSINK PASTE A paste used too fill Via Holes that are designed for Thermal dissipation.
IAR Inner Layer Annular Ring
IPI Inner Layer Pad Insulation
INNER The Inner Layer(s) of the PCB.
LAYER Individual layer of a PCB.
LEAKAGE A type of short, sometimes referred to as a high-resistance short.
LEAD FREE FINISH Final finish applied to the soldering areas of the PCB to prevent oxidation and to them easier to solder.
LEGEND Text printed on top of the Soldermask.
MICRO SECTION of a PTH A cross section of a PTH Hole.
NET PRICE The price excluding Taxes or VAT.
MILLING Used to form the contour of the PCB’s or Panels.
OAR Outer Layer Annular Ring
ORDER SURFACE The total delivered PCB surface area of your order expressed in dm².
OPEN A discontinuity or non-connection within a net .
OUTER The Outer Layer(s) of the PCB either the TOP or BOTTOM side.
PANEL CROSS OUTS A Panel where defective PCB’s have been visually crossed out.
PANEL BORDER Extra material around your PCB or multiple PCB’s to form a Customer Panel.
PANEL OUTLINE The required contour of a Customer Panel.
PCB Printed Circuit Board (also know as “the board”).
PANEL SPACING The PCB Spacing defines the extra space you want between different PCB’s on the Customer Panel.
PEEL-ABLE MASK Also know as Peel-off Mask is a protective coating that can be easily removed.
PCB SEPARATION METHOD Pre-cut the boards in a Customer Panel for easy removal after assembly.
PHD or TOOLSIZE The diameter of the Tool used in production to drill the hole.
PLATING INDEX The density of the Copper distribution.
PLATED HOLES ON THE BOARD EDGE Plated through holes in the edge of the board.
PREPREG An unpressed base material without any copper foil.
PP The Pad to Pad spacing specified in mm
PRESS-FIT HOLES Holes designed for the press fit of component leads, usually connectors.
ROUND EDGE PLATING The edge of the board is plated with copper and then the final finish such as HAL.
SHIPMENT DATE The date on which the order is shipped.
SHORT An electrical connection between two or more nets or isolated points that should not be connected.
SMD or Surface Mount Device Surface mounted Device.
SINGLE PCB or SINGLE PANEL PRICE The price for one unit of the delivery format chosen in the calculator.
SOLDERMASK (SM) A protective layer of liquid photo image able lacquer applied on the TOP and BOTTOM side of a Printed Circuit Board.
SPECIFIC TOLERANCES Tolerances that are required to meet specific design goals and are not within the latest Industrial Standard IPC A-600 (x) Class II.
SPECIFIC MARKINGS Customer specific markings such as logo, name, date code etc…
STENCIL Stainless Steel template for applying Solder paste onto the board.
THROUGH HOLE A hole that goes through the PCB from the Top Layer through to the Bottom Layer.
Tg Tg stands for Glass Transition Temperature and is one of the parameters of a base materials.
TOTAL PRICE The price for all selected items.
TOP Top side of the PCB.
TT The Track to Track spacing specified in mm
TP The Track to Pad spacing is specified in mm
UL MARKING The Underwriters Laboratory (UL)
TW The Track Width is specified in mm
VIA HOLES A hole that creates an electrically connected through the PCB.
VIA FILLING The filling of Via Holes with Resin