Circuit Prototype Customized PCB F4 material

What does FR-4 stand for?

The definition of fr-4 comes from the nema specification: li1-1983, which refers to a test burn sample of glass fiber epoxy resin. Its size is 5 inches long, 0.5 inches wide, and a copper-free substrate with any thickness. With a specific Bunsen burner, Place the sample at an angle of 45 degrees to ignite it, then remove the fire source and let the board that has been added with flame retardant (such as 20% bromine) to extinguish by itself, and record the "extended burning" after leaving the fire with a stopwatch The number of seconds. After ten test firings, the total number of seconds is less than 50 seconds is called v-0, and the number of seconds less than 250 seconds is called v-1. Any glass fiber epoxy resin sheet that meets v-1 , Are called fr-4. In addition to the commonly used fr-4 material, pcb also has high-functional high-tg resins, such as: bt, polymide, cyanate ester and ptfe, etc. But the low price of fr-4, good adhesion The advantages of strength, low moisture absorption, etc. are not comparable to other resins. Therefore, most of the High Quality Prototype PCB Fabrication pcbs are made of fr-4 material for copper-clad laminate (ccl), which is a pc board. Important institutional components. It is composed of copper foil (skin), resin (meat), reinforcing material (bone), and other functional reinforcing additives (tissue). PC board types and layers Application areas Paper phenolic resin sheet, Rogers PCB (fr1&fr2) TV, High frequency board double panel (cem1&cem3) TV, Microwave radio frequency board display, metal base printed board power supply, metal core printed board, automotive Electronic products, mice, electronic notebooks, glass fiber cloth epoxy resin single and double panel (fr4) adapter cards, Computer Peripherals, and game instruments, glass fiber cloth epoxy resin multilayer board (fr4 & fr5) desktop Computers, notebook computers, palmtop computers, digital TV speakers, Microwave radio frequency board fax machines, automotive industry, military equipment.

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