* 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.

Advantages of Aluminum PCB

- Good thermal performance and long life
- Good thermal conductivity and insulation
- Low cost -Energy efficient and recyclable
- Easy to assemble
- High durability
- Lightweight

Manufacturing Difficulties of Aluminum PCB

The manufacturing process for nearly all-aluminum PCBs is essentially the same. Here we will discuss the major manufacturing processes, the difficulties, and their solutions.

1. Copper Etching: the copper foil used in Aluminum PCBs is comparatively thicker. If the copper foil is over 3oz, however, the etching requires width compensation. If it is not according to the demand of the design, the trace width will be out of tolerance after etching. Therefore the trace width compensation should be designed accurately. The etching factors need to be controlled during the manufacturing process.

    

2. Solder Mask Printing: due to the thick copper foil there is a difficulty in solder mask printing of aluminum PCB. This is because if the trace copper is too thick then the image etched will have a large difference between trace surface and baseboard and solder mask printing will be difficult. Therefore, two-time solder mask printing is used. The solder mask oil used should be of good quality and in some cases, the resin filling is done first and then solder mask.

    

3. Mechanical Manufacturing: the mechanical manufacturing process involves mechanical drilling, molding and v-scoring, etc. which Is left on internal via. This tends to reduce electrical strength. Therefore, electric milling and professional milling cutter should be utilized for the low-volume manufacturing of products. The drilling parameters should be adjusted to prevent burr from generating. This will help your mechanical manufacturing.