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.
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.
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.
Researchers at the University of Maryland have achieved a first in lithium-ion battery science: the development of a successful lithium-based battery using one material for all three core components of a battery -- anode, cathode, and electrolyte.
The online Bar Steel Fatigue Database for automotive design engineers has been updated for the fifth time and now contains 134 iterations, or grade/process combinations. It provides better predictability for designing parts with long-term reliability and durability.
FPGAs use programmable fabric to create custom logic, but this flexibility comes at a cost -- usually around 10 times more silicon real estate and 10 times the power dissipation. Can we really claim any FPGA is low power?
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