Missing chip or flag

[VTiederle]

Recently I made a simulation for a multi-chip module where some BGA, QFN and a lot of capacitors and resitors are mounted. This module was attached as LGA to a PCB.
I defined the package as BGA and set the chip thickness to 0 - would this lead to valid results?

For QFN without flag - is it possible to set the thickness of the flag to 0?

[Nathan Blattau]

Hi Viktor,

A QFN device without a center solder pad needs to be treated as a SON device (small outline no-leads). The lead geometry is then set to STUB.

Setting the flag thickness to zero will likely generate an error or unrealistically short life.

Regards,
Nathan