PHOTOCHEMICAL ETCHING TECHNICAL DATA CAPABILITIES

Photochemical Etching Technical Data Capabilities
From Advanced Metal Etching

The photochemical etching technical information below highlights our photo etching capabilities and lowest tolerances achievable based on many variables such as metal thickness, metal type and special part features such as holes,  slots, and half-etched designs.

Our goal is to design a photo tool with as many parts per sheet of metal as possible.  As a general rule of thumb, thicker material and tighter tolerances will require a smaller sheet yielding fewer pieces.  On the contrary,  thinner metal with an extended range of tolerances will increase sheet size and part pieces.  Photochemical etching techniques are designed to achieve the lowest possible tolerance and the highest number of parts per sheet in order to save the customer time and money.

photo_chemical_etching
Table 1    Etched Dimension Tolerances
Thickness (T) in inches
.001″ .002″ .005″ .010″ .015″ .020″ .040″
Empirical ±.0010 ±.0010 ±.0015 ±.0020 ±.0030 ±.0050
Table 2    Holes or Slots
Metal Thickness (T) Diameter or Width
.001″ -0.005″ At least Metal Thickness, Minimum .003″
.005″ or Over Minimum of 1.1 times
Metal Thickness
Table 3    Web or Finger
Thickness (T) Space Between Holes (W)
Less than .005″ At least Metal Thickness, Minimum .003″
Over .005″ Minimum of 1.0 times
Metal Thickness
Table 4    Center to Center Tolerances
C/C Dimensions (inches) Tolerance Attainable
1.0″ or Less ±.0005″
1.0″ – 3.0″ ±.0010″
3.0″ – 6.0″ ±.0020″
6.0″ – 10.0″ ±.0030″
Table 5    Half Etch Based on Material Thickness
A B C
25% – 75% 100% + 25%

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