PCB007 Magazine

PCB007-Aug2019

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AUGUST 2019 I PCB007 MAGAZINE 97 • Connection via placement (Figures 12 and 13) – Offset from plated slot = 0.338 mm – Edge aligned to the plated slot hole wall – Centered between non-plated holes (slot separators) Finalize Mechanical Symbol • Using "edit > property" and the "find filter" feature to enable objects for selection, add the properties as outlined: – Pin properties on the plated slot and non-plated slot separators: ° NO_SHAPE_CONNECT ° ADJACENT_LAYER_KEEPOUT_ ABOVE = 1 (VeCS-2 overshoot clearance) ° ADJACENT_LAYER_KEEPOUT_ BELOW = 1 (VeCS-2 overshoot clearance) – Via properties added on the connection vias: ° DYN_MIN_THERMAL_CONNS = 1 ° DYN_THERMAL_CON_TYPE = ORTHOGONAL • Using "edit > property" and the "find filter" feature to select "drawing" from the "find by name" pulldown (Figure 14), add the properties as outlined: – Symbol drawing level property associated with the mechanical symbol: ° LOCKED ° NODRC_SYM_SAME_PIN Figure 12: Plated slot, non-plated hole (slot separator), and connection vias alignment (symbol origin at cline endpoint). Figure 13: Mechanical symbol placed in the design, BGA pin drive connection via net name. Figure 11: Connection via with cline stub. Figure 14: Setting up mechanical symbol.

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