Precision Photochemical Etching Expert
SinoGuide strive to be a leading manufacturer in the precision photochemical etching industry. Photo etching produces intricate components with exacting tolerances that are impossible to duplicate by other processes.
All dimensions, tolerances and configurations are functions of the thickness of the material being photo etched and should be considered during the design process. The following guide gives practical limitations for chamfer, holes, spacing and construction dimensions with relation to metal thickness for photo chemical milling.
See Figures 1 at the right for a representation of the features referenced. Consult us for design assistance when these situations occur.
Dimensions as illustrated Figures 2
The smallest chamfer is proportional to the metal thickness, The propose the Chamfer is less than 0.04mm. Consult us if a smaller chamfer is required.
Generally, the diameter of a hole cannot be less than the metal thickness. This relationship varies as the metal thickness changes. A more exact relationship is illustrated in Table 1
Generally, the spacing cannot be less than the metal thickness. This relationship varies as the metal thickness changes. A more exact relationship is illustrated in Table 2.
Our photo etching parts best tolerances achievable are +-0.01mm on the flat profile size & +-0.10mm on formed dimensions. As a simple rule of thumb best tolerances offered would be 10% of material thickness. However often better tolerances can be provided if necessary, but please ask one of our etching sales team.