3m Innovative Properties Company

Jyothsna Ram

Pradnya V Nagarkar

Nancy S Lennhoff

Linda S Heath

James T Richard

Radha Sen

Carl A Chiulli

David W McCarthy

Substantially transparent electrodes are formed on a substrate by a process including forming on the substrate, in order, a bottom high index layer, a metallic conductive layer, and a top high index layer with a conductivity of at least about 400 &#x3a9;/square; and chemically etching the bottom high index layer, the top high index layer and the conductive layer to form discrete electrodes in the metallic conductive layer.

Etching process for making electrodes

An ablatable laminar imaging medium useful in the manufacture of a substantially transparent electrode assembly is disclosed. The laminar imaging medium comprises a substrate, a high-index metal oxide layer, an ablatable metallic conductive layer, a high-index conductive metal oxide layer, and an ablation enhancement layer. The ablation enhancement layer has an IR-absorption greater than the IR-absorption of said high-index conductive metal oxide layer and an IR-reflectivity less than the IR-reflectivity of said high-index conductive metal oxide layer. Presence in the laminar imaging medium of the ablation enhancement layer lowers the exposure threshold of the medium and improves ablation accuracy, both&mdash;when occasioned in the manufacture of LCD electrode patterns&mdash;resulting collectively and ultimately in a more reliably formed electrical architecture, less susceptible to unwanted &ldquo;shorting&rdquo;.

Ablation enhancement layer

Substantially transparent electrodes are formed on a substrate by a process including forming on the substrate, in order, a bottom high index layer, a metallic conductive layer, and a top high index layer with a conductivity of at least about 400 &OHgr;/square; and chemically etching the bottom high index layer, the top high index layer and the conductive layer to form discrete electrodes in the metallic conductive layer.

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Shrewsbury, MA, United States of America

Jyothsna Ram