FIELD: printing.
SUBSTANCE: method for processing a substrate of head for ejecting the fluid includes the stage of providing the substrate and the stage of providing a deepened section on the rear surface of the substrate by ejecting fluid in a linear form from the rear surface of the substrate, and by processing the rear surface of the substrate by laser light which passes along the fluid and in the liquid.
EFFECT: increased mechanical strength of the substrate.
9 cl, 10 dwg
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