When designing a PCB to factory fabrication, how to choose PCB material?
PCB material classification:
1. According to different materials (the most commonly used classification method)
Paper substrate (FR-1, FR-2, FR-3)
Epoxy glass cloth substrate (FR-4, FR-5)
Composite Substrates (CEM-1, CEM-3)
HDI sheet (RCC)
Special substrates (metal substrates, ceramic substrates, thermoplastic substrates, etc.)
2. Divided by resin
Phenolphthalein resin board
Epoxy board
Polyester resin board
BT resin board
PI resin board
3. According to the flame retardant performance
Flame retardant type (UL94-VO, UL94-V1)
Non-flame retardant type (UL94-HB grade)
The principle of PCB material use:
Factors to consider when selecting PCB materials:
What are the normal of PCB materials?
King Sun standing FR-4 sheet specifications:
Material Type | Base Laminate Thickness (+/-) |
1 | 0.2+/-0.038mm (Copper H/H,1/1oz) |
2 | 0.25+/-0.038mm (Copper H/H,1/1oz) |
3 | 0.36+/-0.05mm (Copper H/H,1/1oz) |
4 | 0.41+/-0.05mm (Copper H/H,1/1oz) |
5 | 0.51+/-0.064mm (Copper H/H,1/1oz) |
6 | 0.61+/-0.064mm (Copper H/H,1/1oz) |
7 | 0.71+/-0.064mm (Copper H/H,1/1oz) |
8 | 0.8+/-0.1mm (Copper H/H,1/1oz) |
9 | 0.9+/-0.1mm (Copper H/H,1/1oz) |
10 | 1.0+/-0.1mm (Copper H/H,1/1oz) |
11 | 1.2+/-0.13mm (Copper H/H,1/1oz) |
12 | 1.5+/-0.13mm (Copper H/H,1/1oz) |
Remark:
1) The thickness of the sheet is 0.8mm or less and the thickness of the base copper is not more than 0.8mm.
2) The above sheet thickness tolerance is IPC-4101 CLASS B/L. If the design requires the use of tighter tolerance grade sheets, a “Special Material Order Notice” must be issued to the relevant department for purchase.
3) The above sheet suppliers commonly used by our company are KB (Jianyu), NANYA (South Asia), VENTEC (Tenghui) and SHENYI (shengyi), among which the six specifications of NANYA are 36”x48” , 40”x48. ”, 42”x48”, 36.5”x48.5”, 40.5”x48.5” and 42.5”x48.5”, other suppliers’ specifications are 36”x48”, 40”x48”, 42”x48”,37 “x49″, 41″x49″ and 43″x49”.
4) The base copper thickness of our company is H/HOZ and 1/1OZ. If we exceed this range, we need to issue a “special order notice” to relevant departments.
5) FR-4 sheets with sheet thicknesses other than this range, eg 0.15 ± 0.025mm (without copper),0.1±0.018mm (without copper), 1.9±0.18mm (with copper), 2.3±0.18mm (with copper)
In the company can produce and can be purchased, but ME need to “special materials order book” to the relevant departments.
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