• Pad size: 0.5 mm × 0.5 mm × 0.017 mm
• Cathode/Anode: 0.5 mm × 0.1 mm × 0.5 mm
• Plate: 0.5 mm × 0.7 mm × 0.05 mm
• Dielectric: 1.5 mm × 1.8 mm × 0.1 mm
• Gap b/w two plates: 0.4 mm
• Capacitor size: 1005

• Dielectric thickness: 0.1 mm
• Pad size: 0.5 mm × 0.5 mm
• Copper thickness: 0.017 mm
• Via: 0.1 mm (outer radius), 0.08 mm (inner radius)
• Space b/w package vias: 0.8 mm
• Distance b/w package via and cap via: 2.5 mm

• Maximum number of passes: 10
• Minimum number of passes: 1
• Minimum converged passes: 1
• Percent error: 1%
• Percent refinement per pass: 30%

• Maximum number of passes: 10
• Minimum number of passes: 1
• Minimum converged passes: 1
• Percent error: 1%
• Percent refinement per pass: 30%

q3d_smtind.zip

• PCB stack-up dimension & capacitor structure that form a loop for the extraction of a effective inductance
• Solver residual : 1e-005
• Solving frequency : 1GHz

• What is the difference between AC and DC inductance?
  At DC, currents flow relatively uniformly throughout a conductor. At high frequencies, the skin effect forces currents to flow near the surface of conductors. This difference in the current distributions translates to a difference in the inductance. At frequencies above a few hundred MHz, the currents in metal conductors are generally confined to the surface and AC calculations are most appropriate. At lower frequencies, or in poorer conductors, the skin depth should be calculated and compared to the thickness of the conductors. If the conductors are not thick relative to a skin depth, then the DC inductance is probably a more appropriate choice.
• Where should the source and sink be located?
  Inductance is a property of current loops. The source and sink should be located near each other and the current should be forced to flow in a well-defined loop. Q3D allows the source and sink to be placed at points distant from each other and does not care if the current flows in a loop. In situations where there is not a well defined loop, the output from Q3D is a partial inductance (actually a matrix of partial-self and partial-mutual inductances) that has relatively little meaning in practical applications.