There are kinds of SMD LED and through-hole LED available in our factory. For some high power LED, we normally just produce it with SMD LED package type because that will make sure the LED can dispatching the extra heat during it's working(As we know, there will have extra heat while the LED working in the high operation current). And SMD LED type will got a better heating dispatching performance in this case.
For high power LED, no matter the high power IR LED or high power colorful LED. The main size is 3535 SMD LED type, 5050 SMD LED type or 8mm SMD LED type.
In this case, we going to discuss about the 8mm SMD LED type. There will have a dome lens on the top of SMD LED. A dome lens placed on top of an LED can diffuse and scatter the light emitted by the LED, creating a more even and wider distribution of light. But for some high power LED, the dome lens cannot handle the high temperature. Which means the dome lens will be melted during the reflow soldering machine. It will be the picture as follow:
This can cause a number of issues, including:
1. Reduced light output: The dome lens is designed to focus and direct the light emitted by the LED. Without the lens, the light will be dispersed in all directions, resulting in reduced brightness and efficiency.
2. Color shift: The dome lens is also responsible for filtering and shaping the light emitted by the LED. When it is melted, the color temperature and spectral distribution of the light can be altered, resulting in a different color appearance.
3. Damage to the LED: The high temperatures used in reflow soldering can damage the LED itself, particularly if the lens is melted and the heat is not properly dissipated.
To avoid these issues, it is important to use appropriate soldering techniques and equipment when working with high power LEDs. This may include using lower temperature soldering methods, such as hand soldering or hot air rework, or using specialized tools and fixtures to protect the dome lens during reflow soldering.
In order to make things better, the dome lens high power LED that can handle high temperature are also available in our factory now. When you need this high power LED to work good during the reflow soldering, just let us know then we will offer the correct product for your test.