Method of fabricating and patterning OLEDs

US6013538A · kind A · utility

Assignee

• THE TRUSTEES OF PRINCETON UNIVERSITY · US

Inventors

• Paul E. Burrows · Chattaroy, US
• Stephen R. Forrest · Ann Arbor, US
• Peifang Tian · Princeton, US

Key dates

• Filing date: Nov 24, 1997
• Grant date: Jan 11, 2000
• Expiry date: Nov 24, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K71/40

Abstract

A multiple layer patterning system with an undercut allows the deposition of a material onto a substrate from a direction substantially perpendicular to the substrate, followed by the angular deposition of a protective cap. Because of the angular deposition, the protective cap extends into the undercut and completely covers and surrounds any previously exposed surface of the material. The material is thereby protected from subsequent exposure to substances that may be deleterious.