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Selecting the right substrate material and proper manufacturing process are the basic but most important steps to customize a calibration target.

 STEP 01: the operating environment (transmission, reflective or natural illumination) is essential to select either transparent or opaque material. Transparent material are for example soda lime glass, acryl or film. For reflective illumination/ natural illumination applications opaque material such as matte ceramic, aluminum and carbon fiber boards are your options.

 STEP 02: the required accuracy is the important parameter when selecting the manufacturing process. The accuracy of Photosensitive ink pattern as an example is +/-10um while the accuracy of Chrome pattern from Direct Write lithography process is +/-1um, +/-0.1um; Beside accuracy, the smallest line width or minimum feature size is also a critical parameter. The limitation of Chrome pattern from Direct Write lithography process is 0.7um, and the Photosensitive ink exposuring process allows feature sizes down to 0.3mm.