Fabrication of various dimensions of high fill-factor micro-lens arrays for OLED package

被引：42

作者：

Liu, K. H. ^{[2
]}

Chen, M. F. ^{[1
]}

Pan, C. T. ^{[1
]}

Chang, M. Y. ^{[3
]}

Huang, W. Y. ^{[3
]}

机构：

[1] Natl Sun Yat Sen Univ, Ctr Nanosci & Nanotechnol, Dept Mech & Electromech Engn, Kaohsiung 804, Taiwan

[2] ROC Mil Acad, Dept Mech Engn, Kaohsiung, Taiwan

[3] Natl Sun Yat Sen Univ, Dept Photon, Kaohsiung 804, Taiwan

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2010年 / 159卷 / 01期

关键词：

OLED; Gapless micro-lens array; NiCo electroplating; Fill-factor; THERMAL REFLOW PROCESS; GLASS; MICROLENSES; DEVICES;

D O I：

10.1016/j.sna.2010.02.020

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Organic light-emitting diode (OLED) has been the subject of much interest in the lighting and display module. This study focuses on how to enhance brightness and scatter through a micro-lens array (MLA) with high fill-factor. A LIGA-like (Lithographie Galvanoformung Abformung, LIGA) process was applied to the fabrication process because it has good replication for microstructures. Seven kinds of micro-lens arrays with different dimensions were designed. These dimensions with different aspect ratio were divided into two groups, i.e. gapless high fill-factor and low fill-factor with gap. They were used to compare their optical properties of brightness with each other. In addition, a controllable method was also developed to design the contour of a micro-lens. Then, a metallic mold with MLA was fabricated by nickel-cobalt (NiCo) electroplating process. A highly accurate and strong mold can be obtained. Finally, a UV (ultraviolet) curable polymer was used as the material of an optical film in this replication process of a MLA. After these optical films with MLAs were obtained, an optical microscope (OM) and a photometer were used to measure and characterize the optical results. The experimental results of the MLA were compared with those of the design. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：126 / 134

页数：9

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