Essential Tips Chem Etching Design Engineers Should Know: Line Thickness and Bevels

This is the last post in a series of four that discusses essential tips that design engineers should know in order to create better photo etching designs.

Last week, we discussed how to design for tabs and tie ins.

This week, we’re going to address line thickness in relation to bevels.

By its nature, etching leaves some degree of slope on the metal’s edge, a fact that designers should always have in mind when defining line widths.

Bevels mean that the width of the metal at the surface of a sheet may not necessarily be as large as the width of the metal from the bevel.

For example, a wire that measures .014 wide at the surface may actually measure .016 wide with the bevel.

Normally, photo chemical machinists will measure the width from the widest point – including the bevel – so if surface width is important to your design, specify it on the print.

 Line Thickness and Bevels


The difference between the surface width and the width from the widest point can be enormously significant in some designs.

That’s why it’s important to understand the two measurements and their relationship to bevels.

Advanced photo etching tips design engineers should know.