Photo Chemical Etching: Tolerances

Photo etching tolerances in mm or as % of thickness in mm. Precision note tolerances may be improved with development, and are subject to feature geometry, material type and sheet size.

For greater chemical etching tolerances see Laser Evolved Etching Process

Material Thickness (T)	General Tolerance Achievable	Hole/Slot Size	Bar Width
0.025 - 0.050	±0.025	0.1000	160% T
0.050-0.100	±0.025	0.1000	150% T
0.100 - 0.125	±0.025	125% T	110% T
0.125 - 0.150	±0.025	125% T	110% T
0.150 - 0.200	±0.030	125% T	110% T
0.200 - 0.250	±0.030	125% T	100% T
0.250 - 0.500	±12.5% T	125% T	100% T
0.500 - 1.000	±12.5% T	125% T	100% T
1.000 - 2.000	±12.5% T	125% T	100% T

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