Technical Terms And Abbreviations For PCB's - Eurocircuits

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Technical terms andabbreviations

Technical terms that are frequently used in the Printed Circuit Board manufacturing industry.

To simplify communication Eurocircuits uses abbreviations for many of these technical terms. Most of the technical terms and abbreviations are international standards in the Printed Circuit Board manufacturing industry. However to make it clear to everyone involved, we here present a list of technical terms and abbreviations along with their explanation.

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

SECTION B

TERM
ABBr.
USED
Short Description
Supporting Documents

BARE BOARD TESTING

 BBT PCB Electrical testing of the non-populated PCB. Bare Board Testing

BASE MATERIALS

 PCB Type of base material used for producing the PCB Downloads – Base Materials

FR-4: Used by many known by few

Understanding Material Properties and Processing

BLIND and BURIED VIA HOLES

 PCB A blind via connects an Outer Layer (OL) to one or more Inner Layers (IL) but does not go through the entire board.

A buried via connects two or more Inner Layers (IL) but does not go through to an Outer Layer (OL).

 Blind and Buried Via

Buildup Editor User Guide

BOARD PRICE

 PCB The price includes the price for the PCB’s selected in the calculator Boards Price

BOARD SURFACE/ORDER SURFACE

 PCB The individual PCB and the total order surface are in dm². Board Surface

BOARD THICKNESS

 PCB The thickness given in mm based on the base materials used Board Thickness

Finished PCB Thickness Tolerance

BOTTOM

 PCB Bottom side of the PCB. Bottom side of the PCB

10 Rules for Better Data

BUILDUP

 PCB Defines the build of your PCB, such as Number of Layers, Sequence, copper thickness, position in the build and possible blind and buried vias.

There are more than 900 pre-defined builds available.

 PCB or Board Buildup

Buildup Editor User Guide

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SECTION C

Definition
ABBR.
USED
Short Description
Supporting Documents

CARBON CONTACTS

 PCB Carbon ink normally used for keyboard contacts, LCD contacts and jumpers. Carbon Contacts

PCB Design Guidelines – Carbon Contacts

CHAMFERED MECHANICAL or COUNTERSUNK HOLES

 PCB A bevelled edge of a holes usually at 45 degrees. Chamfered Mechanical Holes or Countersunk Holes

COMPONENT PAD PITCH

 PCB Smallest component pad pitch in mm PP – Pad to Pad

COPPER

 Cu PCB Cu is the chemical abbreviation for copper Cu – Copper

COPPER FOIL

 PCB Copper foils is the base copper thickness applied on outer and inner layers. Copper Foil

PTH process video

COPPER UP TO THE BOARD EDGE

 PCB Copper is placed up to the very edge of the board contour. Copper up to the Board Edge

Copper and the Board Edge – Blog

CORE

 PCB A rigid base material laminate with copper on one or two sides. Core or Rigid Copper Laminated Base Material

PCB Multilayer Fabrication – Lay-up and Bond

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SECTION D

Definition
ABBR.
USED
Short Description
Supporting Documents

DELIVERY FORMAT

 PCB

ASSY

 The method in which you ask Eurocircuits to produce and delivery your PCB design. Delivery Formats

Guidelines for customers that opt for the Eurocircuits standard panel

DELIVERY TERM

(Lead time)

 ALL Number of working days required to manufacture (from the when all data & information is available and correct) Lead time

Shipping

DEPTH ROUTING

 PCB Removing a specific area of the PCB Outer Layer to a specific depth. Depth Routing

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SECTION E

Definition
ABBR.
USED
Short Description
Supporting Documents

eC REGISTRATION COMPATIBLE

 PCB PCBs or Customer Panels that have the necessary Tooling Holes to be used with the Eurocircuits eC-stencil-mate or eC-stencil-fix equipment. eC-Registration Compatible

More on eC-registration

EDGE CONNECTOR BEVELING

 PCB Bevel (chamfer) the leading edges of an edge connector to help guide it into the socket PCB Design Guidelines – Edge Connectors

Edge Connector Bevelling

EDGE CONNECTOR GOLD SURFACE

 PCB A layer of gold plated to the fingers of the edge connector. Edge Connector Gold Surface

Gold Plating for Edge Connectors

PCB Design Guidelines – Edge Connectors

ELECTROLESS NICKEL IMMERSION GOLD

 Che Ni/Au or ENIG PCB ENIG (Electro less Nickel Immersion Gold), also called Che Ni/Au, (Chemical Nickel Gold) or also known as soft gold. Ch Ni/Au or ENIG (Electroless Nickel Immersion Gold)

Soldermask on via-holes in case of chemical Nickel-Gold surface finish

EXTRA PRESS CYCLES

 PCB When producing multi-layers with blind and buried via holes, additional Press Cycles may be required. Extra Press Cycles

EXTRA PTH RUN

 PCB When producing multilayers with blind and buried via holes, the panel may need to pass through the galvanic plating process multiple times. Extra PTH run

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SECTION F

Definition
ABBR.
USED
Short Description
Supporting Documents

FIDUCIAL

 PCB

ASSY

 An target used for optical alignment Fiducial

FINISHED HOLE SIZE

 PCB The finished hole size or ENDHOLE is the diameter that the PCB designer specifies in his PCB layout. Finished Hole Size

FR4

 PCB Fiberglass reinforced epoxy laminates that are Flame Retardant. FR4 Quality – What to Expect

How Often Can You Raise a Eurocircuits PCB to Lead-free Soldering Temperature

FR-4: Used by many known by few

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SECTION G

Definition
ABBR.
USED
Short Description
Supporting Documents

GLASS TRANSITION TEMPERATURE

 Tg PCB Tg (Glass Transition Temperature) is one of the parameters of a base materials. Tg – material Tg

GROSS PRICE

 ALL The price including VAT Gross Price

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SECTION H

Definition
ABBR.
USED
Short Description
Supporting Documents

HEATSINK PASTE

 PCB A paste used as an interface between heat sinks and heat sources. It can also be used too fill via holes that are designed for thermal dissipation Heatsink Paste

PCB Design Guidelines – Heatsink Paste

HOLES <= MAY BE REDUCED

 PCB Final holes sizes smaller or equal to this given diameter can be reduced to accommodate the correct annular ring values What is the finished hole size?

What is a via hole in a PCB?

PCB Design Guidelines – Drilled Holes

HOLE DENSITY

 PCB The number of holes per dm² of the board surface. Hole Density

HOT AIR LEVELLING

 HAL PCB Hot Air Levelling using lead free tin (Sn) HAL Lead-Free

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SECTION I

Definition
ABBR.
USED
Short Description
Supporting Documents

INNER

 IL PCB The Inner Layer of the PCB. INNER Layer

Suggestions for Naming Your CAD-Data-Files

INNER LAYER ANNULAR RING

 IAR PCB Inner Layer Annular Ring What is the Inner Annular Ring (IAR)?

Understanding annular rings

Layer to Layer Registration Tolerances

INNER LAYER PAD INSULATION

 IPI PCB Inner Layer Pad Insulation IPI – Inner Layer Pad Insulation

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SECTION L

Definition
ABBR.
USED
Short Description
Supporting Documents

LAYER

 PCB Individual layer of a PCB. Layer of the Printed Circuit Board

LEAD FREE FINISH

 PCB

ASSY

 Final finish applied to the soldering areas of the PCB to prevent oxidation and to them easier to solder. Any Lead Free Finish

Which surface finish fits your design

LEAD TIME

(Delivery term)

 PCB Number of working days required to manufacture (from the when all data & information is available and correct) Lead time

Shipping

LEAKAGE

 PCB A type of short, sometimes referred to as a high-resistance short. Leakage

LEGEND

(also known as Silkscreen)

 PCB Text printed on top of the Soldermask. What is the legend of a PCB?

PCB Design Guidelines – Legend Print

PCB Assembly Design Guidelines – Legend Print Clipping for Assembly

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SECTION M

Definition
ABBR.
USED
Short Description
Supporting Documents

MICRO SECTION of a PTH

 PCB A cross section of a PTH Hole. Micro section of a PTH

MILLING

 PCB Used to form the contour of the PCB’s or panels. Milling

PCB Design Guidelines – Mechanical Layer

Sorting out Drills and Cutouts

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SECTION N

Definition
ABBR.
USED
Short Description
Supporting Documents

NET PRICE

 ALL The price excluding taxes or VAT. Net Price

NUMBER of LAYERS

 PCB Number of copper layers in the PCB What is a Layer of a PCB

PCB Design Guidelines – Copper Layers

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SECTION O

Definition
ABBR.
USED
Short Description
Supporting Documents

OPEN

 PCB A discontinuity or non-connection within a net. Open

ORDER SURFACE

 PCB

ASSY

 The total delivered PCB surface area of your order expressed in dm². Order Surface

OUTER

 PCB The Outer Layer(s) of the PCB either the TOP or BOTTOM side. Outer Layer

Suggestions for naming your CAD data files

OUTER LAYER ANNULAR RING

 OAR PCB The copper on the outer layer that surrounds a drilled hole or cutout in the PCB What is Outer Annular Ring (OAR)?

Understanding annular rings

Layer to Layer Registration Tolerances

OUTER LAYER COPPER FOIL

 PCB The outer layer copper foil is the base copper used for creating the outer layers.

The final copper thickness of the outer layers will be 20-30 microns thicker after plating.

 What is Copper Foil?

Plating

OUTER LAYER ISOLATION DISTANCE

 OL-TT OL-TP OL_PP The outer layer isolation between copper features (track to track, track to pad, pad to pad) What is track width (TW)?

Track Width and Isolation Gap Tolerances

OUTER LAYER TRACK WIDTH

 OL-TW Copper track widths on the outer layers of the PCB. What is track width (TW)?

Track Width and Isolation Gap Tolerances

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SECTION P

Definition
ABBR.
USED
Short Description
Supporting Documents

PACKAGE QUANTITY

 PCB The maximum number of PCBs per package for shipment Shipping

PAD to PAD SPACING

 PP PCB The Pad to Pad spacing specified in mm PP – Pad to Pad

PANEL BORDER

 PCB

ASSY

 Extra material around your PCB or multiple PCB’s to form a Customer Panel. Panel border of a Customer Panel

Customer Panel Guidelines

Panel Editor

PANEL BY

 PCB

ASSY

 The individual PCBs can be delivered ina panel format.

The panel format can be created in 3 different ways.

 Customer Panel Guidelines

Panel Editor

PCB Configurator – Panel Section

PANEL CROSS OUTS

 PCB

ASSY

 A Panel where defective PCBs have been visually crossed out. Panel without Cross Outs

Panel Editor

PANEL OUTLINE

 PCB

ASSY

 The method used to create the contour of the panel Panel Outline

PANEL SIZE

 PCB

ASSY

 The physical size of the panel in X & Y Customer Panel Guidelines

Panel Editor

PCB Configurator – Panel Section

PCBs PER PANEL

 PCB

ASSY

 The number of PCBs in a panel Customer Panel Guidelines

Panel Editor

PCB Configurator – Panel Section

PCB QUANTITY

 PCB

ASSY

 The number of PCBs you wish to order

PCB SEPARATION METHOD

 PCB Pre-cut the boards in a Customer Panel for easy removal after assembly. PCB separation method – on a Customer Panel

Panel instructions – V-cut basics

PCB SIZE

 PCB Width (X) & Height (Y) of the PCB

PCB SPACING

 PCB

ASSY

 The PCB Spacing defines the space you want between different PCBs on the Customer Panel What is PCB spacing?

Customer Panel Guidelines

Panel Editor

PCB Configurator – Panel Section

PEELABLE MASK

 PCB Also know as Peel-off Mask is a protective coating that can be easily removed. Peelable Mask

PCB Design Guidelines – Peel-off Mask

PLATED HOLES ON THE BOARD EDGE

 PCB Plated through holes in the edge of the board. Plated Holes on the Board Edge

Copper and the Board Edge

Castellations on a PCB

PLATING INDEX

 PI PCB The density of the Copper distribution. Plating Index

Plating Simulation – our New Tool for PCB Designers

Plating Index Solutions

PREPREG

 PCB An unpressed base material without any copper foil. Prepreg or Unprocessed Copper Free Base Material

PCB Multilayer Fabrication – Lay-up and Bond

PRESS-FIT HOLES

 PCB Holes designed for press fit component leads, usually connectors Press-Fit Holes

PRINTED CIRCUIT BOARD

 PCB PCB Printed Circuit Board (also know as “the board”). Printed Circuit Board

Tolerances on PCB

PRODUCTION HOLE DIAMETER or TOOLSIZE

 PHD PCB The diameter of the tool used in production to drill the hole. PHD – Production Hole Diameter

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SECTION R

Definition
ABBR.
USED
Short Description
Supporting Documents

REPEAT

 PCB

ASSY

 The number of PCBs requires in the X & Y of the panel Customer Panel Guidelines Panel EditorPCB Configurator – Panel Section

ROUND EDGE PLATING

 PCB The edge of the board is plated with copper and then the final finish such as HAL. Round Edge Plating

Copper and the Board Edge

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SECTION S

Definition
ABBR.
USED
Short Description
Supporting Documents

SHIPMENT DATE

 ALL The date on which the order is shipped. Shipping

Shipment Date

Info on Shipping

SHORT

 PCB An electrical connection between two or more nets or isolated points that should not be connected. Short

SINGLE PCB or SINGLE PANEL PRICE

PCB

ASSY

 The price for one unit of the delivery format chosen in the calculator. Single PCB or Single Panel Price

SMALLEST FINAL HOLE

 PCB Smallest final drilled hole diameter on the PCB What is the finished hole size?

What is a via hole in a PCB?

PCB Design Guidelines – Drilled Holes

SOLDERMASK

 SM PCB A protective layer of liquid photo imageable lacquer applied on the TOP and BOTTOM side of a Printed Circuit Board. SM-Soldermask

SPECIFIC DIMENSION TOLERANCES

 PCB Specific PCB dimension tolerances that differ from the Eurocircuits standard tolerances What are Specific Tolerances

PCB Design Guidelines – Mechanical Layer

SPECIFIC HOLE TOLERANCES

 PCB Specific drilled hole tolerances that differ from the Eurocircuits standard drilled hole tolerances What are Specific Tolerances

PCB Design Guidelines – Drilled Holes

SPECIFIC MARKINGS

 PCB Customer specific markings such as logo, name, date code etc… Specific Marking

Marking Editor

SPECIFIC TOLERANCES

 PCB Tolerances that are required to meet specific design goals and are not within the latest Industrial Standard IPC A-600 (x) Class II. Specific Tolerances

STENCIL

 PCB Stainless Steel template for applying Solder paste onto the board. Stainless Steel template for applying solder paste onto the board

Laser stencil production video

Use of screen printer video

How to Order a Stencil?

SURFACE FINISH

 PCB The Surface finish applied to exposed copper to protect it from oxidisation and to aid soldering Surface Finishes on Printed Circuit Boards

How Often Can You Raise a Eurocircuits PCB to Lead-free Soldering Temperatures?

RoHS and Lead-free Compliance

SURFACE MOUNT DEVICE

 SMD ASSY Surface mounted Device Surface Mount Device

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SECTION T

Definition
ABBR.
USED
Short Description
Supporting Documents

Tg

 PCB Tg (Glass Transition Temperature) is temperatiure at which the base material becomes mechanically unstable What is Tg

TECHNOLOGY CLASS

 PCB Technical classification value for the layout pattern and drill holes PCB Design Guidelines – Classification

THROUGH HOLE

 TH PCB A hole that goes through the PCB from the Top Layer through to the Bottom Layer. NPTH – Non Plated Through Hole and PTH – Plated Through Hole

PCB Design Guidelines – Drilled Holes

TOP

 PCB

ASSY

 Top side of the PCB. Top side of the PCB

10 Rules for Better Data

TOTAL PRICE

 ALL The price for all selected items. Total Price

Info on Invoicing and Payment

TRACK to PAD SPACING

 TP PCB The Track to Pad spacing is specified in mm TP – Track to Pad

TRACK to TRACK SPACING

 TT PCB The Track to Track spacing specified in mm TT – Track to Track

TRACK WIDTH

 TW PCB The Track Width is specified in mm TW – Track Width

PCB Classification for Pattern and Drill Class

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SECTION U

Definition
ABBR.
USED
Short Description
Supporting Documents

UNDERWRITERS LABORATORY MARKING

 UL PCB

ASSY

 The Underwriters Laboratory (UL) UL Marking

What about UL ?

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SECTION V

Definition
ABBR.
USED
Short Description
Supporting Documents

VIA HOLES

 PCB A hole that creates an electrically connected through the PCB. Via Hole

PCB Design Guidelines – Drilled Holes

VIA FILLING

 PCB The filling of Via Holes with Resin PCB Design Guidelines – Via Filling

What is Via Filling

IPC-4761 Via Protection Type Classification

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SECTION W

Definition
ABBR.
USED
Short Description
Supporting Documents

WARP and TWIST

 PCB

ASSY

 The distortion of the PCB. Warp and Twist

WIRE BOND

 PCB

ASSY

 Connectiong components to the PCB using wire bonding rather than soldering

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