Glass compositions and glass frit composites for use in optical applications

A technology of glass frit and compound, applied in the direction of electric solid-state devices, semiconductor devices, electrical components, etc., can solve the problems of LED package chromaticity and/or output deviation, reduce the effective life of LED package, etc.

Active Publication Date: 2017-02-15
FERRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, organosiloxanes used as polymer matrix degrade during the lifetime of the LED, causing shifts in the chromaticity and / or output of the LED package, thereby reducing the effective lifetime of the LED package

Method used

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  • Glass compositions and glass frit composites for use in optical applications
  • Glass compositions and glass frit composites for use in optical applications
  • Glass compositions and glass frit composites for use in optical applications

Examples

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Embodiment

[0108] The following examples are provided to generally illustrate various embodiments according to the inventive subject matter and should not be construed as limiting the inventive subject matter.

[0109] Various lead, bismuth and zinc glasses were analyzed for use according to the subject matter of the invention (Table 2). Barium, magnesium and calcium glasses are also contemplated. Due to the desire to have a sintering temperature of the glass+phosphor composite below 900°C, the analysis was limited to three main glass systems - lead, bismuth and zinc based glass systems. While lead glasses may have a higher index of refraction and lower firing temperatures than bismuth or zinc glasses, it may be desirable to develop lead-free, cadmium-free glasses to avoid harmful components.

[0110] Various bismuth glasses based on bismuth-zinc-silicate and bismuth-zinc-borate glass systems are analyzed. These bismuth glasses tend to crystallize (note that this is different from an i...

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Abstract

The invention relates to glass compositions and glass frit composites for use in optical applications, and a method of making a light emitting diode package through the glass frit composites. The method includes sintering a glass frit composite to form a phosphor-containing layer comprising phosphor dispersed in a glass matrix. The phosphor-containing layer is positioned, such that light from a light emitting diode is transmitted through the phosphor-containing layer. The glass frit composite includes a glass frit formed from a sintered mixture. The sintered mixture includes glass frit formed by firing a mixture including about 20-60 mole % SiO2, about 14-50 mole % ZnO, and about 3-28 mole % B2O3. The sintering temperature of glass is relatively low, so that fluorescence of phosphor isn't obviously degraded in a sintering process. The phosphor-containing layer can be used in optical applications, including conversion of blue light to white light with different color temperatures.

Description

technical field [0001] The present subject matter relates to phosphor-containing glass compositions and related methods for optical, glass color applications. [0002] Background of the invention [0003] Transparent layers and compositions are commonly used in optical applications where light is transmitted through a layer of transparent material for viewing. Several factors are typically considered when formulating the transparent layer for a particular application. These factors include, for example, optimizing the percent transmission of light through the transparent layer and increasing the functionality of the transparent layer for modifying the light as it passes through the transparent layer, eg, upconverting or polarizing the light. Transparent layers are commonly used in various optical applications, such as displays in televisions and smartphones, and light-emitting diodes (LEDs). Due to their much lower power consumption and longer lifetime compared to other lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50C03C3/091C03C3/093
CPCC03C3/091C03C3/093H01L33/501C03C3/095C03C4/12C03C8/04C03C8/14C03C10/0054C03C14/006C03C2214/16H01L2924/181H01L2224/48091H10K50/85H10K50/86H01L2924/00014H01L2924/00012H01L33/502H01L33/58H01L2933/0033H01L2933/0041H01L2933/0058
Inventor 约翰·J·马洛尼斯里尼瓦桑·斯里德哈兰杰基·D·戴维斯格雷戈里·R·普林斯巴赫乔治·E·萨科斯克
Owner FERRO CORP
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