Laminate

Base material for pcb�s are distinguished into their substantial consistency. Base material is classified on the basis of the
chemical, electrical and thermal characteristics of the substance.

The following indices are used:

   Tg - Value (gas conversion temperature)
   ε_r- Value (permittivity)

The listed ε_r-values apply to a frequency of 1 MHz.

You can also enquire materials which are not listed in the table, e.g. PTFE, Rogers, aluminium...

FR4	Specification	Characteristics
	Epoxy glass   Copper foil, one- and double sided   Contur mill / V-cut   One- and double-sided PCBs,   multilayer	- Standard material   - Mechanically stress-resistant   - Heat-resistant   - Tg- Value  135 - 170   - εr- Value  4.7   - Dielectric strength  40kV   - Flammability UL 94  V0   - Thermal endurance 105°C
FR5	Specification	Characteristics
	Epoxy glass   Copper foil, one- and double sided   Contur mill / V-cut   One- and double-sided PCBs,   multilayer	- Mechanically stress-resistant   - Highly heat-resistant   - Tg- Value  160 - 170   - εr- Value  4.7   - Dielectric strength  42kV   - Flammability UL 94  V0   - Thermal endurance 140°C
FR2	Specification	Characteristics
	Phenolic resin paper   Copper foil, one- and double sided   Contur mill / V-cut / punch   One- and double-sided   non-via PCBs (NPTH)	- Consumer electronics   - Punchable in large numbers   - Inexpensive   - Tg- Value  30   - εr- Value  4.1   - Dielectric strength   15kV   - Flammability UL 94  V1
CEM1	Specification	Characteristics
	Core is made of Phenolic resin paper   Outside is made of epoxy glass   Copper foil, one- and double sided   Contur mill / V-cut   One- and double-sided   non-via PCBs (NPTH)	- Consumer electronics   - Inexpensive   - Tg- Value  60/90   - εr- Value  4.2   - Dielectric strength  40kV   - Flammability UL 94  V0
CEM3	Specification	Characteristics
	Core is made of glass mat,   epoxy resin   Outside is made of epoxy glass   Copper foil, one- and double sided   Contur mill / V-cut   One- and double-sided PCBs	- Inexpensive alternative for FR4   - Mechanically stress-resistant   - Heat-resistant   - Tg- Value  125   - εr- Value  5.0   - Dielectric strength  40kV   - Flammability UL 94  V0