Abstract
As inkjet is a non-contact printing method, one feature of inkjet printing is that flying droplets are affected by air currents and other factors and fluctuate before impact. We focused on the fact that the randomness of that fluctuation can be moderately adjusted to give the printed state an individuality that is easy to observe. This is to say that it is possible to deliberately create print with sufficient individuality while maintaining the legibility of the text. This study verified that it is possible to adjust the same print data so that they do not result in the same print, and that the different prints can be identified as different prints by the captured image data. In the verification of this printing technology applied to semiconductor backside protection tape, it was confirmed that no significant change in printing conditions appeared before and after reliability tests assuming market distribution, and that the printing could be correctly identified. The development of this method has shown the possibility of realising authenticity and traceability of electronic components.
