Organic electronic circuit and method for making the same

US7291859B2 · kind B2 · utility

Assignee

• Thin Film Electronics ASA · NO

Inventors

• Rickard Liljedahl · Säter, SE
• Goran Gustafsson · Säter, SE

Key dates

• Filing date: Jul 21, 2005
• Grant date: Nov 6, 2007
• Expiry date: Dec 3, 2025

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B82Y10/00
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

In an organic electronic circuit, particularly memory circuit with an organic ferroelectric or electret material the active material comprises fluorine atoms and consists of various organic materials. The active material is located between first and second electrode sets constituting respectively bottom and top electrodes of the device. A cell with a capacitor like structure is defined in the active material and can be accessed for an addressing operation via the electrodes. At least one top electrode comprises a layer of gold in contact with active material. A second layer on the top electrode comprises conducting material different from gold or can alternatively also be made of gold. A via connection extends between the second electrode layer and a bottom electrode or another electrode in the bottom electrode layer. In case the second electrode layer is made of gold the via metal of the via connection can also be gold and integral with the second electrode layer. In a method for establishing a top via electrode connection in the device, a first top electrode layer of gold is deposited and a via hole etched therethrough and down to the bottom electrode layer, and via metal is depo…