Ink-jet type recording head and monolithic integrated circuit su

Details Ink-jet type recording head and monolithic integrated circuit su Ink-jet type recording head and monolithic integrated circuit su

1996-04-15

1997-02-11

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

257370, 257371, B41J 205, H01L 2994, H01L 27092

Patent

active

056025769

ABSTRACT:
A recording head comprises a liquid emission member having an orifice through which an ink is emitted, an electro-thermal converter element for generating a thermal energy which is utilized to emit the ink introduced into the liquid emission member, and a functional element disposed on a same substrate on which the electro-thermal converter element is disposed for driving and controlling the electro-thermal converter element.
The functional element includes an NPN bipolar transistor for driving the electrothermal converter element and a CMOS transistor composed of an NMOS transistor and a PMOS transisfor for controlling an operation of the bipolar transistor.
The NMOS transistor being formed in a P well diffusion layer in an N.sup.- type epitaxial growth layer which is grown on a surface of a P type semiconductor substrate.
The PMOS transistor being formed in an N well diffusion layer in the N.sup.- type epitaxial growth layer which is grown on the surface of the P type semiconductor substrate.

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Cole, B. "CAD, CMOS and VLSI Are Changing Analog World" Electronics, Dec. 23, 1985, pp. 35-39.
Tsubone, K. et al. "A Smart BiCMOS Driver for 400 DPI Thermal Printing Heads" Proceedings of the IEEE 1988 Custom Integrated Circuits Conference, pp. 5.2.1-4.

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