Browse Prior Art Database

Bubble Ink Jet Head

IP.com Disclosure Number: IPCOM000034621D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Gostomski, DA: AUTHOR

Abstract

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.

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Bubble Ink Jet Head

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. A very thin protective coating 8 overlies the protective coating 7 and the heaters 6 to protect the heaters 6 from ink. Each of the heaters 6 is aligned with a nozzle 9 (Fig. 1) in a nozzle plate 10, which is slightly spaced from the flex circuit 2 to enable ink to be supplied from the container 1 through openings 11 in the common conductor 5 into a space formed between the nozzle plate 10 and the flex circuit 2. The nozzle plate 10 has an adhesive around its edges to bond the nozzle plate 10 to the flex circuit 2 while providing the small space therebetween for the ink to enter through the openings
11. Accordingly, when one of the heaters 6 (Fig. 3) is e...