Thermal Clad & Metal Backed Printed Circuit Boards
Epec offers thermal clad and metal printed circuit boards with a full selection of high performance or low cost materials from leading suppliers around the world. Thermal clad PCB's are a dielectric metal base with a bonded copper circuit layer. This creates superior heat transfer to help cool components while eliminating problems associated with managing fragile ceramics.
With a wide range of electrical and thermally conductive interface pads, thermally conductive gap fillers, thermal phase change materials and thermally conductive electrically insulating materials, we can manufacture thermal clad & metal backed printed circuit boards that exceed all of our customers' expectations.
Thermal Clad Layers
Thermal clad is a unique layered system comprised of the follow layers.
Printed circuit foil with thickness of 1oz to 5 oz.
Many different options which offer electrical isolation with minimum thermal resistance. Also used to bond the circuit layer and base material together. Each specific dielectric has its own UL recognition.
Most often Aluminum, but can also be copper. The most commonly used thickness is 0.040" (1.0mm) although many thicknesses are available.
Specification of Aluminum Based Copper-clad Laminate
|Solder Resistance (288°C)||Sec.||Min||600||IPC-TM-650 220.127.116.11|
|Thermal Shock||288°C * 10"/cycle||Min||6 Times||IPC-TM-650 18.104.22.168|
|Peel Strength (Normal status)||lb/in||Min||9||IPC-TM-650 2.4.8|
|Breakdown Voltage||V/mil||750||IPC-TM-650 2.5.6|
|Volume Resistivity (Normal status >E+14)||Ω * cm||1.8x1015||IPC-TM-650 22.214.171.124|
|Surface Resistivity (Normal status >E+12)||Ω||3.5x1014||IPC-TM-650 126.96.36.199|
1 MHz Normal Status
1 GHz Normal Status
1 MHz Normal Status
1 GHz Normal Status
|Water Absorption||%||0.2||IPC-TM-650 188.8.131.52|
(measured on insulation layer only)
|Td||°C||410||TBD (5wt% loss)|
|MOT (RTI)||°C||130||UL 746B|
|CTI (Comparative Tracking index)||V||600 (PLC=0)||UL 746E DSR|
Thickness & Dimension of Aluminum Based Copper-clad Laminate
|Product Category||CS-AL-88/89 L1 (The thickness of resin is 2-8mil)|
300-340 x 500-520
405/400 x 500-520
600-620 x 500-520
1200-1240 x 500-520
1200-1240 x 1020-1060
|Thickness of Single Sided PCB
with Aluminum Substrate
|2.0 1/0||1.5 1/0||1.5 2/0||1.0 1/0||0.8 1/0|
|Thickness of Double Sided
PCB with Aluminum Substrate
|2.0 1/1||1.5 H/H||1.5 1/1||1.0 1/1||0.8 1/1|
* The above thickness excludes the thickness of resin and the thickness of copper and Aluminum can be combined arbitrarily.
* The thickness of copper foil: H oz. - 5.0 oz. The thickness of aluminum plate: 0.2 - 5.0mm.
* Halogen free material.
* Compliance with RoHS and REACH.
Formable Thermal Printed Circuit Board Solutions
A unique proposition is Formable Thermal LED PCB Solutions. Unlike brittle ceramic or epoxy systems, the dielectric is formulated using a flexible thermally loaded material.
This allows component placement using standard paste and reflow techniques, the board is formed to shape after assembly giving a one piece system removing the need for interconnecting wires.
Thermal Clad PCB Material
Thermal Clad PCB Specifications
- 1 & 2 Layer Dielectrics
- Up to 5 oz finished Cu
- Al and CU base material up to .250" thick
- HASL, ENIG and Pb Free HASL finish available
Thermal Clad PCB Benefits
- Lower Operating Temperatures
- Improved Product Durability
- Increased Power Density
- Increased Thermal Efficiency
- Reduced Number of Interconnects
- Lower Junction Temperatures
- Reduced PCB Size
- Eliminates Older Hardware
- Minimizes Labor Required for Assembly
- Wide Variety of Form Factors
- Minimize Thermal Impedance
Thermal Clad Printed Circuit Board Applications
You can improve the durability and performance of your product by using Thermal Clad circuit boards. Simple designs and low thermal impedance of the dielectric out performs all other printed circuit board insulators for power and high-operating temperature components. Below are some example of applications using thermal clad and aluminum backed PCB's.
Thermal clad offers a variety of thermal performances is compatible with mechanical fasteners and is highly reliable.
Using Thermal Clad PCB's assures the lowest possible operating temperatures and maximum brightness, color and life.
Thermal Clad dielectric choices provide the electrical isolation needed to meet operating parameters and safety agency test requirements.
Solid State Relays:
Thermal clad offers a very thermally efficient and mechanically robust substrate.
The automotive industry uses Thermal clad boards as they need long term reliability under high operating temperatures coupled with their requirement of effective space utilization.