Integrated thick film electrostatic writing head

Details Integrated thick film electrostatic writing head Integrated thick film electrostatic writing head

1989-09-21

1990-12-11

Griffin, Donald A.

Recorders

Electric recording

Electrochemical

G01D 1500

Patent

active

049774166

ABSTRACT:
An improved electrographic writing head employs interleaved arrays of writing nibs and small geometry, high impedance, thick film resistors and semiconductor driver circuits fabricated on separate glass epoxy substrates disposed in adjacent back to back relation. The writing head achieves significant savings in manufacturing costs by using low cost printed circuit and thick film technology. Power consumption may be reduced by more than half over prior art devices due to the high impedance of each thick film pull up resistor coupled with an associated writing nib. A ground plane is disposed between the adjacent substrates and between adjacent arrays of writing nibs. The ground plane prevents electrical interaction between the substrates and prevents the formation of parasitic nib-to-nib capacitance by shunting parasitic capacitance currents to ground. The ground plane thus reduces the possibility of flaring and substantially eliminates inadvertent writing by adjacent nibs.

REFERENCES:
patent: 3626422 (1971-12-01), Lloyd
patent: 3653065 (1972-03-01), Brown, Jr.
patent: 3693185 (1972-09-01), Lloyd
patent: 3903594 (1975-09-01), Koneval
patent: 4030107 (1977-06-01), Tagawa
patent: 4054885 (1977-10-01), Rothgordt
patent: 4092650 (1978-05-01), Hinz
patent: 4163980 (1979-08-01), Angelbeck et al.
patent: 4165514 (1979-08-01), Ishima
patent: 4183032 (1980-01-01), Ohbori et al.
patent: 4215355 (1980-07-01), Moore
patent: 4271417 (1981-06-01), Blumenthal et al.
patent: 4356501 (1982-10-01), Ronen
patent: 4359753 (1982-11-01), Marshall
patent: 4385306 (1983-05-01), Conta
patent: 4415403 (1983-11-01), Bakewell
patent: 4424522 (1984-01-01), Lloyd et al.
patent: 4447821 (1984-05-01), Yuasa et al.
patent: 4466020 (1984-08-01), O'Connell
patent: 4521790 (1985-06-01), Allard
patent: 4636816 (1987-01-01), Playe
patent: 4689643 (1987-08-01), Playe
patent: 4719481 (1981-01-01), Tuan et al.
patent: 4727386 (1988-02-01), Playe
patent: 4766450 (1988-08-01), O'Connell

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