Bubble Ink Jet Head
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
A bubble ink jet head has a high density of nozzles through disposing heaters on a flex circuit. Each heater is aligned with one of the nozzles in a nozzle plate to form a bubble each time the heater is rapidly energized. The bubble forces ink through the nozzle as a droplet. An ink supply container 1 (Fig. 1) has an etched flex circuit 2 wrapped therearound and secured thereto. The etched flex circuit 2 has a plurality of conductors 3 formed on a substrate 4 (Fig. 2) capable of being subjected to a temperature of 600oC. A common conductor 5 (Fig. 3) is connected to each of the conductors 3. (Image Omitted) Each of the conductors 3 has a heater 6 formed therein, as shown in Fig. 2. A protective coating 7, which may be a polymer, for example, overlies the conductors 3 to protect them from ink.