Altium Designer 文档
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PCB Query((Fields))_AD
PCB Query Fields((S to Z))_AD
Query_Lang-PCBFunctions_Fields_ViaSize_BottomLayerViaSize_BottomLayer_AD
Parent page: PCB Query Functions - Fields
Summary
Returns via objects whose X Size (Bottom Layer) property complies with the Query.
Syntax
ViaSize_BottomLayer : Number
Number will follow the measurement units currently employed for the document – either Imperial (mil; 1mil = 0.001inch) or Metric (mm; 1mm = 0.001meter).
A specific option for the measurement unit can be specified – overriding the default units specified at the document level – through use of an additional measurement unit-based keyword:
AsMils(ViaSize_BottomLayer) : Number– to specify a size in mil.AsMM(ViaSize_BottomLayer) : Number– to specify a size in mm.
Example Usage
ViaSize_BottomLayer = 100
Returns all via objects whose X Size (Bottom Layer) property is equal to 100 current measurement units.
ViaSize_BottomLayer >= 4.064
Returns all via objects whose X Size (Bottom Layer) property is greater than, or equal to, 4.064 current measurement units.
AsMils(ViaSize_BottomLayer) > 80
Returns all via objects whose X Size (Bottom Layer) property is greater than 80mil.
AsMM(ViaSize_BottomLayer) Between 1.524 And 3.81
Returns all via objects whose X Size (Bottom Layer) property is greater than or equal to 1.524mm and less than or equal to 3.81mm.
ViaSize_BottomLayer <> 50
Returns all via objects whose X Size (Bottom Layer) property is not equal to 50 current measurement units.
Tips
- For simple vias (with Stack Mode set to Simple) the X Size (Bottom Layer) property will be the same as the X Size (All Layers) property, since the specified size is used for all signal layers.
- When viewing the properties for a selected via in the Properties panel, the X Size (Bottom Layer) property corresponds to the Diameter field for the Bottom Layer (in the Size and Shape section) when the mode is set to Top-Middle-Bottom, or Full Stack. When the mode is Simple, this will correspond to the Diameter field.
- The X Size (Bottom Layer) property is only defined for pad and via objects.