Electronics Product Design Sevices
TRACE AND SPACE WIDTH for Class 1
Preferred Pad Construction for Class 1 – 0.2/0.2 Surface Mount Technology Recommendations for one trace through 1mm BGA pads are as follows: • Via Pad diameter 0.50mm • Hole callout 0.25mm + 0/-0.25mm • Plane anti-pad 0.7mm • Trace width 0.2mm/Space width 0.2mm • These designs require 0.5‡ ounce outer layer copper foil construction for […]
Embedded PCB
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- AWGThe diameter of wires is measured by a standard reference number referred to as the American Wire Gauge (AWG). Figure 4-4 lists some gauge values and the equivalent diameter. From the diameter and assuming copper wire, we can estimate the resistance per length. For example, 22-gauge wire, typical in many personal computer boxes, has a […]
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