Stencils for solder paste printing are manufactured by laser-cutting and by electroforming, as well as by etching. Your table comparing all three methods might look like this:
| etched | electroformed | laser cut | |
|---|---|---|---|
| materials used | etchable stainless steel, brass | nickel | stainless steel |
| technical differences | limited accuracy on both position and definition; rounded apertures; difficult to use for fine-pitch parts | compared to etching, has better control of wall profile and aperture dimensions | accuracy
limited only by CNC equipment; suited to fine pitch applications |
| comparative advantages and disadvantages | lowest cost; able to produce stepped stencils | smoothest wall finish | most versatile and capable process |
| relative costs and reasons | lowest (simple processing; all apertures defined at once) | intermediate (process more expensive than etching; all apertures defined at once) | most expensive (high capital cost equipment; one aperture cut at a time) |
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