A print head for an ink jet printer comprises a number of ink nozzles for producing ink jets, charging means for charging the ink jets, and also further components assembling the print head. Further, blind randomization is used as a countermeasure to minimize collision attacks where different plaintexts produce the same MAC. Certain of the compounds exhibit antithrombotic activity via direct, selective inhibition of thrombin. The other end of the transmission body defines a second opening. When the head IC chip is pressed and subjected to ultrasonic oscillation, the ultraviolet rays 108 are emitted so as to harden the peripheral portion 151a of the adhesive 151 spread out between the head IC chip 11 and the suspension 12.