You should normally choose to make your board on a product known commercially as 'Econoboard'. This is the type of board used in most domestic electronic equipment and although it has glass fibre outer layers the epoxy binder has a paper based core.
You may need one of the PTFE based materials if you work at high frequencies and high Q. If you have a surface mount board with a lot of very fine tracks then FR4 seems to have slightly better track adhesion.
|Cost||Use in high|
Our stocks of Econoboard and FR4 are both 1/16 inch (1.6 millimetre) thick. You can supply us with other thicknesses if you wish. Both types are available with copper on one side only or on both sides. The copper is applied at 1 ounce per square metre (0.035 mm thickness).
To simplify the specification of printed circuit materials the TSU employs a code letter system as tabulated below. Enter this letter into the 'board material type' drop-down menu included with the online job request form.
|Trade name||Variant type||Main dielectric material|| Dielectric
thickness / mm
thickness / m·10-6
|εr||Tan δ||Manufacturer||Distributer||Data sheet||Stocked|
|A||Fotoboard2||'Econoboard' CEM/1||Paper-epoxy||1.6||1||35||4.2 - 5.5||<0.045 at 1 MHz||Precision Micro||Mega||html||Y|
|B||Fotoboard2||'Econoboard' CEM/1||Paper-epoxy||1.6||2||35||4.2 - 5.5||<0.045 at 1 MHz||Precision Micro||Mega||html||Y|
|C||Fotoboard2||FR4||Glass-epoxy||1.6||1||35||4.55||0.0175 at 1 MHz||Precision Micro||Mega||html||N|
|D||Fotoboard2||FR4||Glass-epoxy||1.6||2||35||4.55||0.0175 at 1 MHz||Precision Micro||Mega||html||Y|
|E||Fotoboard2||FR4||Glass-epoxy||0.8||2||35||4.55||0.0175 at 1 MHz||Precision Micro||Mega||html||N|
|F||RT/Duroid||6010||PTFE||0.635||2||17||10.2||0.0023 at 10 GHz||Rogers Corp||Rogers (Gent)||N|
|G||RT/Duroid||5870||PTFE||3.175||2||17||2.3||0.0012 at 10 GHz||Rogers Corp||Rogers (Gent)||N|
|H||RT/Duroid||5880||PTFE||0.25||2||17||2.2||0.0009 at 10 GHz||Rogers Corp||Rogers (Gent)||N|
|I||AD Series||AD300A||PTFE||0.5||2||17||3.0||0.002 at 10 GHz||Arlon||-||N|
|J||RT/Duroid||5870||PTFE||1.6||2||17||2.3||0.0012 at 10 GHz||Rogers Corp||Rogers (Gent)||N|
Board with the stocked flag 'Y' is available immediately, except under abnormal circumstances.
Board with the stocked flag 'N' is not normally held in stock; although it is still possible that some is left over from a previous job. Enquire of Technical Services for the current situation. If your board is not in stock, or if you do not see the particular type you require in this list, then let us know what specification you need and we will attempt to buy it. Most of the PTFE and other exotic dielectric materials must be imported into this country after being manufactured to order. Minimum purchase quantities (~USD300) apply. There is a four week lead time on them.
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Last modified: 2015 March 18th.