| 摘要 |
PURPOSE: An ink jet printing head is provided to prevent pressure loss and cross-talk by selectively opening/closing a fluid pass using a viscosity of ink, which varies according to the temperature thereof. CONSTITUTION: An ink reservoir is connected to a chamber(120) through a fluid path(140). A chamber heater(130) is provided at a lower portion of the chamber(120) so as to heat ink filled in the chamber(120). The chamber(120) and the fluid path(140) are formed on a substrate(100). A nozzle plate(110) having a nozzle(110a) is installed on the substrate(100). The nozzle plate(110) covers the fluid path(140) and the chamber(120). A narrow section(180) is formed in the fluid path(140) in order to reduce a section area of the fluid path(140). A fluid path heater(170) is provided to heat ink provided in the fluid path(140).
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