Metric Pitch BGA and Micro BGA Routing Solutions
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ABSTRACT
The following paper provides Via Fanout and Trace Routing solutions for various metric pitch Ball Grid Array Packages. Note: the “metric” dimensions are the ruling numbers. To solve the metric pitch BGA dilemma, one should have a basic understanding of the metric feature sizes for:
- BGA Ball Sizes and BGA Land Pattern Pad Construction
- BGA Via Anatomy
- Trace/Space
- Trace and Via Routing Grid
- Differential Pairs
- HDI Hole Size/Annular Ring
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