Electroform Stencil – Trapezoidal Hole Standard

In IPC 7525, item 4.4.5 trapezoidal apertures, there describes for Chemical etch stencils, the trapezoidal dimension can be specified as 1/2 Z. But for Laser cut and Electroform stencils, there only states "trapezoidal aperature is an inherent part of process. Stencil vendors should be contacted for

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