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Laser Photochemical Ablation of Organic Photoconductor Belt Compositions To Remove Conductive And Dielectric Organic Layers

IP.com Disclosure Number: IPCOM000119232D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 33K

Publishing Venue

IBM

Related People

Chuang, TJ: AUTHOR [+3]

Abstract

Disclosed is a method using laser properties to ablate organic layers down to a thin aluminum layer which acts as a grounding plane. The dielectric organic layer is removed cleanly from the 25nm thick aluminum layer on a sheet, or roll, of film. The described method removes no aluminum and produces a well-defined, sharp-edged cut through the organic layers.

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This is the abbreviated version, containing approximately 100% of the total text.

Laser Photochemical Ablation of Organic Photoconductor Belt Compositions
To Remove Conductive And Dielectric Organic Layers

      Disclosed is a method using laser properties to ablate
organic layers down to a thin aluminum layer which acts as a
grounding plane.  The dielectric organic layer is removed cleanly
from the 25nm thick aluminum layer on a sheet, or roll, of film.  The
described method removes no aluminum and produces a well-defined,
sharp-edged cut through the organic layers.

      Ablation is accomplished by way of photo-chemical decomposition
and not by way of photo-thermal decomposition. The use of relative
motion between the excimer laser allows for a continuous cut to be
produced.  The excimer laser has a wavelength of 193-308 nm and uses
.7J to 7J/sq. cm.

      The angle at which the material is ablated varies between 30
degrees to 90 degrees to the aluminum layer. Nonobvious use of the
laser at an oblique angle eliminates any aluminum removal and the
reflectance enhances the organic material ablation.

      Excess conductive ink is applied to the laser cut, filling the
cut and producing a stripe 3.5 - 5 mils thick on the surface of the
organic photoconductor.  The stripe functions to dissipate surface
charge in preparation for formation of the next image.