Board Materials

First we should understand what materials go into a PCB. At the most basic level, the base of the PCBA manufacturer is formed out of some sort of solid, non-conductive, material. This material is then laminated with a copper (or other metal) sheet, this creates the conductive surface.
The base material is usually a type of glass-reinforced epoxy known as FR-4. This is the most common material because it is flame resistant, cheap, and of course has a low conductivity.
For higher performance circuits (RF), there are other types of materials to consider such as ceramic or PTFE bases with various fillers. Since this article is more focused on general PCB design I will not go into details about designing for RF. Fortunately the EDN Network has posted a useful article on choosing PCB materials for high frequency circuits.
Really these two materials are about all that goes into a bare PCB. When you send your design for manufacture (or do it yourself) the electrical connections are usually created by removing select copper portions of the bare PCB.

Following will be continued in next chapter.
Shirley Xia
Oversea sales
Wonderful PCB

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