For example, it is challenging for the chemical etching process to drop below a1.5 aspect ratio while, with laser cutting and electroforming, apertures can be produced that have a1:1 aspect ratio to the stencil thickness.

• 比如，表观比率低于1.；5对于化学腐蚀试一大挑战，而激光切割和电铸可制成表观比率为1