High performance encapsulants for ultra high-brightness LEDs

被引：35

作者：

Mosley, David W. ^{[1
]}

Auld, Kathy ^{[1
]}

Conner, David ^{[1
]}

Gregory, Jay ^{[1
]}

Liu, Xian-Qian ^{[1
]}

Pedicini, Angelo ^{[1
]}

Thorsen, David ^{[1
]}

Wills, Morris ^{[1
]}

Khanarian, Garo ^{[1
]}

Simon, Ethan S. ^{[1
]}

机构：

[1] Rohm & Haas Co, Spring House, PA 19477 USA

来源：

LIGHT-EMITTING DIODES: RESEARCH, MANUFACTURING, AND APPLICATIONS XII | 2008年 / 6910卷

关键词：

LED; encapsulant; silicone; refractive index; heat stable; light stable; siloxane;

D O I：

10.1117/12.761724

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：

The performance requirements for packaging ultra high-brightness LEDs are extremely demanding. These include high continuous use temperatures and light fluxes. Polymer encapsulants play a critical role in the extraction of light, as a host medium for the phosphors to convert blue to white light, and as capping lenses. Encapsulants must also meet critical requirements for viscosity, modulus, and optical transmission under varying environmental conditions, while having a high refractive index to maximize device efficiency. We describe the development of robust one-pot encapsulants having refractive indices of 1.57 and greater than 1.6. These encapsulants are stable at 200 degrees C for time periods greater than 4 weeks.

引用

页数：8

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