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LED Printed Circuit Boards, LED PCBS

LED Printed Circuit Boards, LED PCBS

MOKO LED Printed Circuit Boards Capabilities LED PCBs have unique requirements that a PCB fabricator must understand completely. At MOKO, we have a comprehensive understanding of LED PCB principles, especially with regard to spillover light and heat (thermal) management. Spillover light is an...

MOKO LED Printed Circuit Boards Capabilities

LED PCBs have unique requirements that a PCB fabricator must understand   completely. At MOKO, we have a comprehensive understanding of LED   PCB principles, especially with regard to spillover light and heat   (thermal) management.

 
Spillover light is an issue because LEDs ‘spill’ some light to the side and rear. You choose a white mask to   reflect this light “back out of the box”, but some “white-reflective”   masks change when heated; they become dull and grow thin during the   reflow process and no longer fully reflect the LED’s light.

MOKO lays down a reflective mask that even after heating holds its luster and won’t grow thin and show any   copper color from underneath. We found the best mask on the market to be Taiyo’s LEW1, because it holds its brilliance and doesn’t change color, even after the harsh heat of the reflow process.

Heat management for high power LEDs is also an issue, and heat dissipating metal                 core
printed circuit boards (MCPCBs) go a long way towards solving this problem. The metal core   substrates from Thermagon, Bergquist, Arlon or Univaco help dissipate   the excess heat from the LEDs, but getting the heat from the LED,   through the prepreg, to the metal core,can sometimes be a challenge.

The prepreg’s thickness and how well it’s   bonded to the metal core is crucial. MOKO bonds prepreg that’s thin   enough to transfer the heat, yet thick enough to electrically insulate   the copper conductors.

Even the bonding process of this dielectric   is important. MOKO uses a process that doesn’t leave insulating air   bubbles between the metal of the substrate and the prepreg, because   these bubbles could otherwise inhibit heat transfer.

Contact MOKO
for more information. We’ve   been the PCB fabrication business for years and we have the know-how to   assist you with your LED product planning and design.

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