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Electronics & Test
Assessing Compatibility of Adhesives for LED Assembly
12/9/2013

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Figure 1. If an incompatibility exists between the LED and VOCs, the LEDs discolor rapidly, often within hours of exposure. Light output levels drop and changes in the quality of the light's color or chromaticity occur. Before and after photos show how output levels can deteriorate.
Figure 1. If an incompatibility exists between the LED and VOCs, the LEDs discolor rapidly, often within hours of exposure. Light output levels drop and changes in the quality of the light’s color or chromaticity occur. Before and after photos show how output levels can deteriorate.

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Ann R. Thryft
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Blogger
Re: Quality of the supplier counts too.
Ann R. Thryft   2/26/2014 2:04:57 PM
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That principle works for adhesives in just about every application, and it's critical in automotive and aerospace products.

Nancy Golden
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Platinum
Re: Quality of the supplier counts too.
Nancy Golden   12/11/2013 3:51:58 PM
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I agree, this was a very informative and easy to understand article that discusses an important topic in LED Assembly production. The importance of adhesive selection if overlooked can result in a very poor product despite an otherwise solid design,  and understanding their interaction up front can save time and money in the long run.

"Careful adhesive selection during device design ensures that any incompatibilities between LEDs and adhesives never occur" sounds like excellent advice. Thanks for a great article.

William K.
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Platinum
Quality of the supplier counts too.
William K.   12/10/2013 11:05:18 AM
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Thanks for the educational posting. What we learn is that the whole process is quite complex and that it is vital to understand each of the materials involved, including their chemistry. 

So it is clear that one must work with a reliable supplier to make the correct choices, and then do an adequate amount of testing to assure that the selected materials will work even with the range of production variations. Because we know that there does exist a bit of variability.

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