Aluminum Round Shape HASL Double Sided LED PCB White Solder Mask

White Solder Mask And Round Shape Aluminum PCB Board Manufacturer

Manufacturing Difficulties of Aluminum PCBs:

The manufacturing process for nearly all-aluminum PCBs is basically the same. Here we will discuss the main manufacturing processes, the problems and their solutions.

1: Copper Etching

The copper foil used in Aluminum PCBs is moderately thicker. If the copper foil is over 3-oz however, the etching requires width settlement. If it is not according to the demand of the design, the trace width will be out of tolerance after etching. That is why 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 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 base board and trace surface and solder mask printing will be quite difficult. Therefore, the two-time solder mask printing is preferably used. The solder mask oil used should be of decent quality and in some cases, the resin filling is done first and then solder mask

3: Mechanical Manufacturing:

The mechanical manufacturing process involves molding, mechanical drilling, and v-scoring, etc. Which is left on internal via. This tends to decrease electrical strength. Therefore, the professional milling cutter and electric milling cutter should be used for low-volume manufacturing of products. The drilling parameters should be adjusted to prevent burr from generating. This will help your mechanical manufacturing.

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