Browse Prior Art Database

FABRICATION OF INTEGRATED ELECTROSTATIC PRINTHEAD AND TRAVELING WAVE GRID

IP.com Disclosure Number: IPCOM000026367D
Original Publication Date: 1991-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 4 page(s) / 151K

Publishing Venue

Xerox Disclosure Journal

Abstract

In Figure 1, a traveling wave grid (TWG) 10 which integrates the functions of a print medium transport consists of a thin, insulating member 12 upon which a grid of conductive lines 14 has been delineated in the desired pattern to enable movement of a print medium, such as toner (not shown), from one line to the next through application of appropriate electrical signals to the lines. Traveling wave grids of this type have been fabricated with a structure as exemplified in Figure 1, wherein a cross-sectional view of a TWG 10 is shown.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

FABRICATION OF INTEGRATED Proposed Classification ELECTROSTATIC PRINTHEAD US. C1.346/155 AND TRAVELING WAVE GRID
Heiko Rommelmann
Richard A. Hudson
Bela Richter
Joseph J. Wysocki

Int. C1. G03G 15/00

12

FIG. I

FIG. 2

I- 5 MILS

XEROX DISCLOSURE JOURNAL - VoI. 16, No. 4 July/August 1991 239

30

-

L

FIG. 3

[This page contains 1 picture or other non-text object]

Page 2 of 4

FABRICATION OF INTEGRATED ELECTROSTATIC PRINTHEAD AND TRAVELING WAVE GRID(Cont'd)

In Figure 1, a traveling wave grid (TWG) 10 which integrates the functions of a print medium transport consists of a thin, insulating member 12 upon which a grid of conductive lines 14 has been delineated in the desired pattern to enable movement of a print medium, such as toner (not shown), from one line to the next through application of appropriate electrical signals to the lines. Traveling wave grids of this type have been fabricated with a structure as exemplified in Figure 1, wherein a cross-sectional view of a TWG 10 is shown.

In Figure 2, an electrostatic printhead (EP) 16 consists of a thin insulating member 18 into which holes 20 have been formed and conductive addressing lines 22 delineated to enable the control of print medium flow through the holes by application of an electrostatic field between the lines 22 and ground
24. Electrostatic printheads of this type have been fabricated with a structure as exemplified in Figure 2.

Integration of the two functions may be accomplished by several techniques. Two possible techniques are given in the following embodiments. A schematic representation of a typical cross section of an integrated TWG and EP 30, showing the required relative alignment of a TWG 32 and EP 34, is given in Figure 3.

The embodiments assume that there is a single row of holes 36 in the electrostatic printhead (EP) and that the spatial frequency of the TWG 32 is constant. Neither of these conditions are necessary to the viability of the embodiments of Figure 3.

In one embodiment, holes are formed in aluminized Kapton by plasma etching for each of two substrates. One of these substrates is then further processed to create an addressable EP. The remaining substrate is processed to form a TWG aligned such that the top electrodes 14 are adjacent the row of holes 36 in the su...