Browse Prior Art Database

FABRICATION METHOD FOR RIGID TRAVELING WAVE GRID

IP.com Disclosure Number: IPCOM000026137D
Original Publication Date: 1990-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 79K

Publishing Venue

Xerox Disclosure Journal

Abstract

A rigid structure may be fabricated to serve as a traveling wave grid (TWG) to enable imaging material conveyance in, for example, an electrostatic printer or direct printing applications. A TWG consists of a thin, insulating member upon which a grid of conductive lines has been delineated in the desired pattern to enable movement of a imaging material such as toner, from one line to the next through application of appropriate electrical signals to the lines. See also Schmidlin, U.S.Patent 4,647,179 and references therein. The figure shows a simplified structure of a TWG in sectioned perspective. The fabrication for a rigid TWG is accomplished as follows: a hollow cylinder made of a material such as polycarbonate (Lexana, available from General Electric Co.) is overcoated with several hundred nanometers of metal such as aluminum by various techniques. This metal layer is patterned via laser ablation in a serpentine configuration. The result is an interdigitated electrode assembly which is optionally overcoated with an insulator such as polyvinylidene fluoride (Tedlar*, available from DuPont Co.). The insulator is optionally coated with yet another metal layer which may also be patterned via laser ablation. Registration of the two metal patterns sould be such that the top electrodes are directly above the species between the bottom electrodes resulting in a four-phase structure. After making the appropriate electrical connnections, the complete package is then overcoated with Tedlarato give a level surface for imaging material transport.

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XEROX DISCLOSURE JOURNAL

FABRICATION METHOD FOR Proposed Classification RIGID TRAVELING WAVE GRID
US. Heiko H. Rommelmann C1.198/803.6

Int. C1. B65g 33/14

7 nm 500 ca. aluminum 7

Kapton (ca. 1 mil)

+I It- I4

ca. 3 mil ca. 5 mil

XEROX DISCLOSURE JOURNAL - Vol. 15, No. 4 July/August 1990 197

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FABRICATION METHOD FOR RIGID TRAVELING WAVE GRID(Cont'd)

A rigid structure may be fabricated to serve as a traveling wave grid (TWG) to enable imaging material conveyance in, for example, an electrostatic printer or direct printing applications. A TWG consists of a thin, insulating member upon which a grid of conductive lines has been delineated in the desired pattern to enable movement of a imaging material such as toner, from one line to the next through application of appropriate electrical signals to the lines. See also Schmidlin, U.S.Patent 4,647,179 and references therein. The figure shows a simplified structure of a TWG in sectioned perspective. The fabrication for a rigid TWG is accomplished as follows: a hollow cylinder made of a material such as polycarbonate (Lexana, available from General Electric Co.) is overcoated with several hundred nanometers of metal such as aluminum by various techniques. This metal layer is patterned via laser ablation in a serpentine configuration. The result is an interdigitated electrode assembly which is optionally overcoated with an insulator such as polyvinylidene fluo...