Keep in mind that not every PCB contains all the layers listed â the need for different layer types depends on the specifics of your design. Single layer boards typically include: a mechanical layer, a keep out layer, a routing layer, an overlay layer, a solder mask layer and a solder paste layer.
An austenitic (300 series) stainless steel will outlast both aluminum and steel exposed to rain or salt spray. Steel without a protective coating will do poorly in both environments but if properly plated or painted, may last a long time. The aluminum alloys likely to be found in many consumer products may develop âlawn chair diseaseâ exposed to at least urban rain and condensation but possibly also in cleaner environments as well (up to you to test).
Aluminized steel is basically steel that has been specially treated with an aluminum coating to make it stronger and more durable. Many manufacturers claim that it has all the best qualities of both aluminum and steel â itâs durable, largely heat-resistant, and doesnât corrode under most normal circumstances.luminized steel is basically steel that has been specially treated with an aluminum coating to make it stronger and more durable. Many manufacturers claim that it has all the best qualities of both aluminum and steel â itâs durable, largely heat-resistant, and doesnât corrode under most normal circumstances.