Organic light emitting device structure and process

US6060728A · kind A · utility

Assignee

• FED Corporation · US

Inventors

• Amalkumar P. Ghosh · Hopewell Junction, US
• Gary W. Jones · Raleigh, US

Key dates

• Filing date: Jun 15, 1998
• Grant date: May 9, 2000
• Expiry date: Jun 15, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K59/173

Abstract

Isolation structures and means for isolating the electron injectors in an organic light emitting device are disclosed. The isolation structures may reduce the likelihood of electrical shorts or cross-talks between adjacent columns of electron injector material. The isolation structures may comprise multiple layers of distinct material, including a layer of organic insulation material, such as photoresist or other hydrophobic organic material. The insulation material may be spin or extrusion coated onto the device. The insulation material may be sandwiched between inorganic oxide layers. The insulation material may be selected such that it is capable of being preferentially etched relative to the oxide layers by dry etching methods such as oxygen plasma. Alternatively, the insulation material may be made of material that does not have a very strong adhesion to an underlying oxide layer, so that the insulation material and any conductive material formed on top of it may be removed using a tape lift-off process. Methods for making the aforementioned isolation structures are also disclosed.