In many cases it may be possible to exceed these photo etching limitations, but with a reduction in yield percentage. Consult the factory for design assistance when these situations occur.
Generally, the diameter of a hole or the width of a slot cannot be less than the metal thickness. This relationship varies as the metal thickness changes. A more exact relationship is illustrated in Table 1.
The smallest inside corner radius is directly proportional to the metal thickness. *Consult our sales staff if a smaller or sharp radius is required.
Generally, the width of a finger or web cannot be less than the metal thickness. This relationship varies as the metal thickness changes. A more exact relationship is illustrated in Table 2.
The outside corner radius will be at least .75 of the material thickness.
Generally, the tolerances are a result of the stability of the photo tooling material. Table 3 illustrates the practical tolerances attainable from industry standard Mylar tooling. Consult our sales staff for information on alternate tooling materials.
Generally, a tolerance of ± 15% of the material thickness is practical. A more exact relationship is illustrated in Table 4.