PCB007 Magazine

PCB007-Aug2019

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98 PCB007 MAGAZINE I AUGUST 2019 Using VeCS Structure Placing in Layout • Using "place > manually," select mechanical symbols for the filter pulldown (Figure 15) and place the symbol in free space in the layout • Enable "pins" in the "find filter" feature to select all of the pins on the placed VeCS structure and "RMB > property edit" (Figure 16) • Add the "NO_DRC" property to the pins (Figure 17) • Now, freely copy the VeCS structure inside of the BGA pin field as required (Figure 18) • Turn on the inner layers and route to vias along the slot walls using "route > connect" (Figure 19) Figure 15: The manual placement pulldown menu. Figure 17: Adding the "NO_DRC" Property to the pins from the Edit Property diaglog box. Figure 16: Accessing the properties to select all pins in the VeCS structure. Figure 18: VeCS structures may now be freely copied in the design file. Figure 19: inner layer routing along the slot walls. Changing Layer Depth (VeCS-2) Using VeCS-2 structures requires a change in the mechanical symbol and padstack to gener- ate the appropriate blind drills when structures is placed in the layout. • Cross-section in symbol and padstack must contain the start/stop subclass names to

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