The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2004
Filed:
Nov. 20, 2001
Ewald Guenther, Singapore, SG;
Lim Hooi Bin, Penang, MY;
Soh Ed Vin, Petaling Jaya, MY;
Tan Hou Siong, Negeri Sembilan, MY;
Hagen Klausmann, Penang, MY;
Osram Opto Semiconductors GmbH, Regensburg, DE;
Abstract
An OLED device using improved pillars to facilitate patterning of a conductive layer is described. Conventional use of pillars to pattern electrodes encounters shorting problems due to piling of polymer material at the base of the pillars. This piling deteriorates the profile of the pillars which adversely impacts the ability of the pillars to pattern the conductive layer to form the electrodes. The present invention avoids the shorting problem by separating the pillars into at least first and second sub-pillars. By providing a relatively narrow gap between the sub-pillars, the amount of polymers filling the area between the gap is small. This prevents at least the sidewalls of the pillars facing the gap from being deteriorated by polymer pile-up, thus ensuring that the conductive layer is discontinuous between the sub-pillars.