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At
present, many double-sided and multi-layer boards have high density and high
power, and it is difficult to dissipate heat. Conventional printed board
substrates such as FR4 and CEM3 are poor conductors of heat, and the layers are
insulated, so the heat cannot be dissipated. Local heating of electronic
equipment cannot be ruled out, resulting in high temperature failure of
electronic components, and aluminum substrates can solve this heat dissipation
problem.
Thermal
expansion and contraction are the common nature of substances, and the thermal
expansion coefficients of different substances are different. The
aluminum-based printed board can effectively solve the problem of heat
dissipation, so as to alleviate the problem of thermal expansion and
contraction of different components on the printed board, and improve the
durability and reliability of the whole machine and electronic equipment. In
particular, it solves the problem of thermal expansion and contraction of SMT
(Surface Mount Technology).
Aluminum-based
printed boards are obviously much more stable in size than printed boards with
insulating materials. Aluminum-based printed boards and aluminum sandwich
panels are heated from 30 °C to 140~150 °C, and the size change is 2.5~3.0%.
Circuit
Copper Layer: Printed circuit foil with a thickness of 1 oz to 10 oz.
Dielectric
Layer: The dielectric layer is a layer of thermally conductive insulating
material with low thermal resistance. Thickness: 0.003" to 0.006"
inch
Aluminum Layer: The base layer is usually aluminum or can also be copper. The most
commonly used thickness is 0.040" (1.0 mm), although many thicknesses are
available for selection.
|
No. |
Item |
Process Capability |
|
1 |
Material |
Aluminum core |
|
2 |
Number of Layers |
1 Layer, 2 Layers, 4 Layers |
|
3 |
PCB Size |
1-2 Layers:1300*400mm or 650*550mm Multi-layers: 700*600mm |
|
4 |
Quality Grade |
Standard
IPC 2 |
|
5 |
Thermal
Conductivity (ω/m-k) |
1W,
2W, 3W, 8W, 12W |
|
6 |
Board
Thickness |
0.8-2.0mm |
|
7 |
Non-Plated
Through-hole size |
≥0.7mm |
|
8 |
Plated
Through-hole size |
≥0.3mm |
|
9 |
Min Tracing/Spacing |
4mil / 4mil |
|
10 |
Copper
Thickness |
1-4oz |
|
11 |
Solder
Mask |
Green,
Red, Yellow, White, Black, Blue, Purple |
|
12 |
Surface
Finish |
HASL, HASL lead free, Immersion gold(ENIG), Immersion Tin, OSP, Immersion Silver(Ag), Plating Hard Gold |
|
13 |
Finish Cooper |
1-4oz |
|
14 |
Silkscreen |
White, Black |
|
15 |
Other
Options |
Countersinks, Castellated Holes, Custom Stackup and so on. |
|
16 |
Lead Time |
3-4 days |
AllWinPcba provides one-to-one service to better suit your needs of aluminum PCB manufacturing and assembly service. We welcome your inquiry about our Aluminum PCBs: svc@allwinpcba.com
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