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).
Aluminum (spelled aluminium in most parts of the world) is a metal that is important in a variety of different industries. This post will look at some of the common uses of aluminum in the world today. Aluminum metal is very useful for packaging. It is used in cans and aluminum foil. Aluminum borohydride is added to jet fuel. Electrical wiring is sometimes made from aluminum or a combination of aluminum and copper. Lots of normal household items are made out of aluminum. Cutlery, cooking utensils, baseball bats and watches often are often made out of aluminum.