1. A print head comprising:a nozzle;
a fluid channel formed in a single semiconductor layer to provide printing fluid to the nozzle; and
a Light Emitting Diode (LED) to emit light to heat a printing fluid in the fluid channel causing localized vaporization of the printing fluid and an ejection of a fluid drop through the nozzle;
wherein the LED is formed integrally in the single semiconductor layer with the fluid channel.