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More Design Freedom for LED Packaging with Dow Corning’s New Optical Silicone Encapsulants

Published on 2017-03-02. Author : SpecialChem

Design Flexibilities for LED Packaging
Design Flexibilities for LED Packaging
MIDLAND, Mich. -- Dow Corning has further expanded the design flexibilities for LED packaging manufacturers with the addition of five new optical encapsulants (OEs) to its fast-growing portfolio of advanced LED solutions.

Offering extra high thermal and optical stability with optimized refractive indexes, hardness and gas barrier properties, these five new products broaden design latitudes for very high power LED packages, such as ceramic substrate-based surface mount device (SMD), chip on-board (COB) and plastic leaded chip carrier (PLCC) packaging.

High-Performance Optical Silicone Encapsulants


All introduced under the Dow Corning® label, the five new products include OE-7840, OE-7841, OE-7843, OE-7810 and OE-7820 Optical Encapsulants. They fall into two separate categories of targeted performance properties, but all deliver superior photothermal stability and reliability at sustained temperatures of 150°C.

Takuhiro Tsuchiya, global marketing manager at Dow Corning
“As today’s LED manufacturers continue to design brighter, smaller and more cost-effective LED packages, Dow Corning is working closely with them to evolve advanced new silicone solutions to meet their most demanding challenges. These five cutting-edge optical encapsulants build on the success of our industry-leading OE product family, and enable customers to continue pushing the design boundaries for their high-power LED packages.”

Features of OEs


Dow Corning® OE-7840, OE-7841, OE-7843


Dow Corning, Subsidiary of Dow Chemical Company
  • Three of the products – Dow Corning® OE-7840, Dow Corning® OE-7841 and Dow Corning® OE-7843 Optical Encapsulants – provide OEMs optimized refractive indexes and other features to improve both efficiency and reliability of high-power PLCC LED packages. 
  • The OE-7840 and OE-7841 products respectively offer RIs of 1.5 and 1.48 to allow designers to optimize light output while ensuring their LED packages have good gas barrier properties. 
  • OE-7843 Encapsulant rounds this category out by combining an RI of 1.5 with good anti-silver corrosion properties to enable high-power PLCC LED packages to withstand severe environmental conditions.

Dow Corning® OE-7810 and OE-7820


  • The two remaining new products – Dow Corning® OE-7810 and Dow Corning® OE-7820 Optical Encapsulants – target high-power COB and ceramic substrate-based SMD LED packages, where very high thermal resistance is the priority and corrosive silver is not used. 
  • They offer a choice of durometer tailored to improve durability depending on design parameters. 
  • OE-7810 Encapsulant provides a hardness of Shore A55 for packaging applications that require higher elongation for improved durability under thermal cycling. OE-7820 Encapsulant, with a durometer of Shore A70, delivers higher hardness that can contribute to better handling and minimal dust pick up.

As among the market leaders in materials, expertise and collaborative innovation for LED lighting concepts, Dow Corning offers solutions that span the entire LED value chain, adding reliability and efficiency for sealing, protecting, adhering, cooling and shaping light across all lighting applications.

About Dow Corning


Dow Corning a wholly owned subsidiary of The Dow Chemical Company, provides performance-enhancing solutions to serve the diverse needs of more than 25,000 customers worldwide. Among the global leaders in silicones, silicon-based technology and innovation, Dow Corning offers more than 7,000 products and services via the company’s Dow Corning® and XIAMETER® brands.

About Dow


Dow combines the power of science and technology to passionately innovate what is essential to human progress. The Company is driving innovations that extract value from material, polymer, chemical and biological science to help address many of the world's most challenging problems, such as the need for fresh food, safer and more sustainable transportation, clean water, energy efficiency, more durable infrastructure, and increasing agricultural productivity. Dow's integrated, market-driven portfolio delivers a broad range of technology-based products and solutions to customers in 175 countries and in high-growth sectors such as packaging, infrastructure, transportation, consumer care, electronics, and agriculture.

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Source: Dow Corning
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