OLED panel with advanced sub-pixel overhangs

US11610954B1 · kind B1 · utility

Assignee

• Applied Materials, Inc. · US

Inventors

• Yu-Hsin Lin · San Diego, US
• Ji-Young Choung · Yongin-si, KR
• Chung-Chia Chen · La Habra, US
• Jungmin Lee · Santa Clara, US
• Wen-Hao Wu · Hsinchu, TW
• Takashi ANJIKI · Kyoto, JP
• Takuji Kato · Fukuoka, JP
• Dieter Haas · Bruchköbel, DE
• Si Kyoung Kim · Gwangju-si, KR
• Stefan Keller · Mainaschaff, DE

Key dates

• Filing date: May 13, 2022
• Grant date: Mar 21, 2023
• Expiry date: May 13, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K50/844

Abstract

Embodiments described herein relate to a device including a substrate, a plurality of adjacent pixel-defining layer (PDL) structures disposed over the substrate, and a plurality of sub-pixels. Each sub-pixel includes adjacent first overhangs, adjacent second overhangs, an anode, a hole injection layer (HIL) material, an additional organic light emitting diode (OLED) material, and a cathode. Each first overhang is defined by a body structure disposed over and extending laterally past a base structure disposed over the PDL structure. Each second overhang is defined by a top structure disposed over and extending laterally past the body structure. The HIL material is disposed over and in contact with the anode and disposed under the adjacent first overhangs. The additional OLED material is disposed over the HIL material and extends under the first overhang.