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

These are some of the most commonly used words and terms when talking about the layout, manufacture or assembly of printed circuit board.


A

Annular Ring: This is the amount of metal from the drill hole to the edge of the metal pad. Inner layer annular ring is measured from the edge of the material where drill tool cut through to the edge of the pad. Outer layer annular ring is measured from the plated edge inside the hole to the edge of the pad including the finish platting wrap if any.
Au: This is the symbol for Gold which is a chemical element that is highly conductive

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B

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C

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D

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E

ENIG: Electroless Nickle Immersion Gold
ENIPIG: Electroless Nickle, Immersion Palladium, Immersion Gold

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F

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G

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H

HAL: Hot Air Level, this is shiny (silver in color) finish of solder that is applied by a machine that dips the PCB panle into molten solder
HASL: Hot Air Solder Level, this is shiny (silver in color) finish of solder that is applied by a machine that dips the PCB panle into molten solder

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I

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J

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K

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L

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M

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N

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O

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P

PWB: Printed Wire Board
PCB: Printed Circuit Board

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Q

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R

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S

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T

topy

U

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V

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W

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X

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Y

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Z

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