Base plate for use of recording head, recording head,...

Details Base plate for use of recording head, recording head,... Base plate for use of recording head, recording head,...

2006-02-14

2006-02-14

Pham, Hai (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S056000, C347S058000, C347S064000

Reexamination Certificate

active

06997546

ABSTRACT:
A base plate for use in a recording head, which is used by an ink jet head for printing by discharging ink onto a recording medium, the recording head being provided with energy converting element for discharging the ink by generating a bubble in the ink by converting electric energy to thermal energy, and an anti-cavitation film to protect the energy converting element from shocks generated at the time of bubble growth and extinction, the anti-cavitation film being used as electrodes for detecting the state of the ink by energizing the ink. The base plate comprises a first diode having the a cathode thereof connected to the anti-cavitation film and an anode thereof connected to a ground potential; and a second diode having the anode thereof connected to the anti-cavitation film and the cathode thereof connected to a power supply potential. With the structure thus arranged, it is made possible to reduce the possibility that the circuit element formed on a semiconductor substrate is destroyed by electrostatic discharge.

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