Liquid-jet printing head and printing apparatus having the liquid-jet printing head.
A printing head (1) designed to have a long life, particularly to be able to maintain a long duration life of a heater portion and improved qualities of printed images with improved stability and to achieve high-speed printing, a printing apparatus using the printing head (1) and a method for driving the printing head are provided. On a substrate (2) of the printing head (1) are formed a printing liquid supply chamber (8), liquid channels communicating with the supply chamber (8), liquid channel wall members (4) forming the channels, nozzles (5) for ejecting a liquid, heaters (6) provided as thermal energy transducing elements in the channels, and an electric wiring for energizing the heaters (6). Each channel has a wing-like sectional configuration in the vicinity of the corresponding heater.