Electroform Stencil - Trapezoidal Hole Standard

As far as I understand, in laser or electron beam patterning (I assume this is what is refered to by electroform) one uses a mask (stencil) on the laser/electron beam, or even better on the expanded laser/electron beam, and then this beam profile is focussed down and subsequently imaged on your target.

The size of the feature you are etching on the target is thus defined by the optical magnification of the beam rather than the size of the mask.

Thanks GlowStartled!

For Laser and Electric beam, I think you are right for the Trapezoidal.

But the "Electroform Stencil" is not the same as your "Electric beam patterning".

Electroform means the stencil is "Growning" on a film mask by immersing the whole system in electrolyte bath.