An inkjet printhead includes: a substrate in which an ink feed hole is formed; a chamber layer which is formed on the substrate by performing a photolithography process and which includes a first photosensitive resin; and a nozzle layer which is formed on the chamber layer by performing a photolithography process and which includes a second photosensitive resin. The security device includes security features that enable the identification of genuine optical disks versus counterfeit optical disks. The through holes pass through the light emitting surface. The agent causes the processor to monitor each packet received by the switching module and determine whether each such packet contains a predetermined fingerprint. It is furthermore provided that the gate regions are formed such that they are electrically coupled to one another via a capacitor configuration. The height of the pre-stressed fibers in their relaxed state in the turf is less than the height of the relatively unstressed artificial grass fiber.