Method for electrical tailoring drop ejector thresholds of therm

Details Method for electrical tailoring drop ejector thresholds of therm Method for electrical tailoring drop ejector thresholds of therm

1997-01-21

1998-04-21

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 205

Patent

active

057423075

ABSTRACT:
A method for electrical tailoring of thermal ink jet heater elements. The resistance of ink-jet heater elements formed of polysilicon is changed by applying energy through the resistor element of varying amounts at varying pulse widths. The application of pulsed current for up to 1 second total pulse width at voltages of up to 50 volts decreases the resistance by as much as thirty percent or more of the as fabricated values.

REFERENCES:
patent: 4210996 (1980-07-01), Amemiya et al.
patent: 4532530 (1985-07-01), Hawkins
patent: 4782202 (1988-11-01), Sawae et al.
patent: 4929964 (1990-05-01), Sato et al.
patent: 4947192 (1990-08-01), Hawkins et al.
patent: 4951063 (1990-08-01), Hawkins et al.
patent: 4996487 (1991-02-01), McSparran et al.
patent: 5162814 (1992-11-01), Shirakawa et al.
Yoshihito Ameniya et al., "Electrical Trimming of Heavily Doped Polycrystalline Silicon Resistors", 1979, pp. 1738-1742, IEEE Transactions on Electron Devices, vol. ED-26, No. 11, Nov. 1979.

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