Material of Expansion Cards


Looking to find out more about the expansion card metal material. It it aluminum?

Thinking of laser etching them to make them stand out a bit more and maybe add some sort of texture to them so I can tell them apart when digging in my bag.


I believe they are aluminum. The texture feels the same between the laptop itself and the cards. They also get much colder than I’d expect plastic to be.

1 Like

Not the best picture. But, here’s the result. Decided to just make the USB-A card a sacrifice for testing. Looks to be just fine!

Exciting stuff!


I’m planning on doing some etching of some cards myself, can you share some information about your laser and the settings you used for this etch?

I etched mine last year and I think I just used the normal etching settings and plunger?

Hey @Jeff_Craig, so sorry for the late response here.

There are some relative differences in power intensity of CO2 lasers. But I ran that at 50mm/s speed at a max of 45% power.

I’m also currently working (albeit slowly) on a 3D printed fixture that will allow you to put an expansion card in, zero in the laser, and then you’re set to rock and roll.

I’ll follow up later on with this new fixture and see if it’s something the community is into.