In recent years, LED industry has been rapidly developed, but the problem of heat dissipation has been puzzling the application and development of LED, especially high-power LED in the field of lighting. The application of metal substrate provides a new way to solve the heat dissipation of LED effectively.
Metal core pcb is abbreviated as MCPCB, it is made of thermal insulating layer, metal plate and metal copper foil, which has special magnetic conductivity, excellent heat dissipation, high mechanical strength and good processing performance. For metal core base material, there is aluminum and copper base materials. Aluminum substrate is a kind of metal-based copper clad plate with good heat transferring and dissipation function. Copper substrate has better performance than aluminum, but its price is relatively more expensive than aluminum.
Clients order aluminum pcbs more often, because the price of aluminum pcb is much more economic, they are used for LED lighting, audio frequency apparatus and communication electronic equipment.
Mcpcb Stack UP
A simple layer single sided MCPCB consists of a metal base (usually aluminum, or copper alloy), Dielectric (non-conducting) Layer, Copper Circuit Layer, IC components and solder mask.
Single Layer MCPCB Structure
COB MCPCB, known as "Chip-On-Board" Metal Core PCB, is a type of MCPCB used in thermoelectric separation application.
By using COB MCPCB, the micro-chip (also known as "die") directly touch the metal core where the heat dissipate, and electrically interconnect the trace of circuit board (wire-bonding) so that power supply can be provided.
In normal MCPCB, there's a dielectric layer between trace copper and metal core, and the thermal conductivity is limited by that dielectric layers, so value can only be 1~3 W/m.K. But using COB MCPCB, there's no such dielectric layer because chip (die) direct touch the metal core, so thermal conductivity value of COB MCPCB will be almost the same one of metal core material itself. The normal material of metal core is aluminum, so thermal conduviity of COB MCPCB is more than 400W/m.K.
COB process consists of three main categories to perform when manufacturing the Chip-on-Board:
1st: 'die mount or die attach';
2nd: 'wire bonding';
3rd: 'the encapsulation of die wires'.
By using wire bonding & epoxy packaging then directly embedded on MCPCB, this practice can extend the lifespan of LED and unified light emission.
According to process and material, COB MCPCB applications can be categorized into two types: Mirror Aluminum and silver or gold platting aluminum, or silver plating mirror aluminum PCB.
Structure of COB MCPCB
Two (Double) layers MCPCB is consisting of two layers of copper conductor, put them on same side of metal core (usually aluminum, copper or iron alloy).
Structure of 2L MCPCB
It also has same two layers of copper conductor like Double layers MCPCB, but the metal core is in the middle of two conductor, so there're conductors (trace) on both sides of metal core, and were connected to each other by Vias. So we named it "Double sided MCPCB", and you can populated SMD on both top and bottom.
Structure of Double Sided MCPCB
Multi Layers More Core PCB, you need to consult the salesperson first if PCBWay can be manufactured, The structure is similar with FR4 Multi Layers, but it much more complex to make.
Structure of Multi Layers MCPCB
As our production capacity will always be upgraded and improved, in order to ensure the latest information Capability of MCPCB you can go to the PCB Instant Quote page to Check.
Thermoelectric Separation Technology of Copper Core PCB
Check below parameters about our aluminum pcb material.
l Aluminum thickness: 0.8-2.0mm
l Thermal conductivity: 1.5W/(m·K) and 2.0W/(m·K).
l Peeling strength: >9lb/in
l Solder resistance: SF: 288℃, >180 sec.
l Breakdown voltage: >3000v
l Dielectric loss angle: 0.03
l Flammability: UL 94V-0
According to the structure of metal core in the layers stack-up, pcbway offers single side MCPCB, two layers MCPCB. For two layers MCPCB, which divides into metal core in the middle of layers stack-up, metal core on the bottom side of layers stack-up.
MCPCB, Metal Core PCB, thermal PCB Samples show >>
Please go to homepage of PCB Instant Quote menu to quote; please contact us for more information about metal core pcbs.
