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Posts tagged "electrical test"

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Barebones and Golden Gate Special Requirements

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Requirements for Golden Gate Special:   ( Panel: 18”x24”  with usable space equal to 16½” x 22½”.  As many boards as each panel can yield.  Max. 20 panels.  The silkscreen layer: white.  Production time: 5 days. ) Layers:  1 or 2 Thickness (mils):  31 or 40 or 47 …
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pcb-color

Routing Signals Between PCB Layers

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Part 1: An ESD Example Signal Current Flow in a Layer Transition Abstract: Printed circuit board, PCB, signal paths must often change layers in a board stackup. Under some conditions this can cause problems. An ESD example is used to …
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Voltage testing equipment

An Introduction to Controlled Impedance for PCBs

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What is Controlled Impedance? Electrical impedance is the measure of the opposition (resistance) that a circuit presents to the passage of a current when a voltage is applied in an alternating current circuit.   It is represented by Zo:   Electrical …
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PCB Manufacturing Tips and Tricks

Optimize PCB Manufacturing: Technical Tips for Success

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Designing a printed circuit board poses many challenges. It can be exhilarating to complete a design and send it off to manufacturing but later deflating to receive boards and identify a failure that could have been prevented. Was a mistake …
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Introduction to IPC Inspection Guidelines

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Acceptable Quality Level Before discussing IPC Inspection Guidelines, it’s important to understand the meaning of the term Acceptable Quality Level (AQL), also referred to as Acceptance Quality Limit. It is an inspection standard that prescribes the range of the number …
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Bare Printed Circuit Board Electrical Test

Bare Printed Circuit Board Electrical Test

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Visual inspections are performed following the manufacturing process of a printed circuit board to identify any potential problems. While that may work fine for a two-layer PCB, for multi-layer PCBs, it is almost impossible to visually inspect the internal layers …
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