Rocket PCB uses the industry's excellent Bergquist materials, with high thermal conductivity insulation layer, to ensure the lowest operating temperature, brightest brightness and longest service life of LED. In fact, aluminium substrates with high thermal conductivity can be used in any LED application area.
However, most of the insulating layers of aluminium substrates on the market are made of commercialized FR-4 semi-cured sheets. These insulating layers are all made of epoxy resin. Although these insulating layers have good bonding properties, they have high thermal resistance (thermal conductivity is only the 0.3w/m·k) because they are not filled with high thermal conductivity and high insulation ceramic fillers.
If the aluminum substrate is used, the heat generated by the high power density module can hardly be transmitted to the metal substrate, so the thermal accumulation will accelerate the aging of the power module and eventually lead to the failure of the module. And the insulation strength of this kind of aluminium substrates is limited (<2ΣKVAC), it is difficult to meet the requirements of security testing, and can only be used in low power density situations. For high power density modules, it is difficult to be competent, and there are great hidden dangers.
Bergquist conducts 12 to 18 months of certification tests before each product is put on the market. Bergquist' comprehensive quality verification includes mechanical performance, bonding strength, electrical insulation performance and thermal conductivity performance tests. In order to verify the reliability of long-term use, a test cycle of 2000 hours is usually selected. The main results are as follows:
500 cycles lasting 350 hours in the range of 40℃~150℃
2000 hours thermal aging test at 175 ℃
1 minute at 300 ℃ and 72 hours thermal shock test at 200 ℃
It is these rigorous validation tests that ensure the supremacy of the bergquist thermal Clad in the industry.
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