HIGH FREQUENCY AND HIGH SPEED LAMINATES
Foiled PTFE dielectrics are used as base for high frequency printed boards, and also as electric insulation intended for printed parts of transmitting and receiving equipment. Foiled PTFE dielectrics could work in temperature range from -60°C to +250°C.
As printed board dielectric getinaks, epoxy glass cloth laminate, and also metallic base covered with dielectric. Most often reinforced glass fabric is used to make dielectrics.
Polymer Company LLC — exclusive dealer of Chinese company "Taizhou Wangling Insulating Materials Factory" for sales of foiled dielectrics. We offer high-quality foiled PTFE dielectrics FAF-4D, F4BM255, F4BM350 made in China. We are ready to supply FAF-4D sheets in standard sizes or make products with other sizes and thickness at Your request and upon preliminary agreeing by the manufacturer.
Method of FAF-4D sheet production:
FAF-4D PTFE foiled reinforced sheets are made by pressing glass fabric layers and two-sided lining with copper galvano-resistant electrolytic foil, thickness 0,035 mm or 0,05 mm.
Metallization of openings in FAF-4D sheets is made by direct or chemical-galvanic metallization, including holding in naphthalene-sodium solution. Openings for metallization may be obtained by drilling or milling using drilling and milling machines.
FAF-4D PROPERTIES:
- high mechanical strength;
- high radiation resistance;
- long-term stability of parameters in wide temperature and frequency range;
- minimal dependence of parameters from changes in the environment.
Camber depends on thickness of foiled PTFE dielectric. Maximal camber in mm depending on thickness of PTFE-4 foiled dielectric is given in table below:
|
Thickness (mm) |
Maximal camber (mm/mm) |
|
0,25 – 0,5 |
0,025 |
|
0,8 – 1,0 |
0,02 |
|
1,5 – 2,0 |
0,015 |
|
3,0 – 5,0 |
0,01 |
Electric properties of PTFE foiled dielectric:
|
№ |
Parameter |
Test conditions |
UOM |
Norm |
||
|
1 |
Density |
At normal conditions |
g/sq.cm |
2,2 ~2,3 |
||
|
2 |
Water intake |
Submerging into distilled water temperature 20±2 °С for 24 hours |
% |
≤0,02 |
||
|
3 |
Working temperature |
In low / high temperature chamber |
°С |
-60 ~ +260 |
||
|
4 |
Thermal conductivity coefficient |
|
kcal/m., 1 hour |
0,8 |
||
|
5 |
Thermal expansion coefficient |
Temperature increase by 96°С each hour |
Thermal expansion coefficient х1 |
≤5 х 10-5 |
||
|
6 |
Compression coefficient |
2 hours in boiling water |
% |
0,0002 |
||
|
7 |
Surface resistance of insulation |
500 V DC |
At normal conditions |
М. Ω |
≥ 5 х 103 |
|
|
|
|
Under action of humidity and temperature |
|
≥ 5 х 102 |
||
|
8 |
Volumetric resistance |
At normal conditions |
М. Ω cm |
≥ 5 х 105 |
||
|
|
|
Under action of humidity and temperature |
|
≥ 5 х 104 |
||
|
9 |
Resistance between openings |
500 V DC |
At normal conditions |
М. Ω |
≥ 5 х 104 |
|
|
|
|
|
Under action of humidity and temperature |
|
≥ 5 х 102 |
|
|
10 |
Surface electric strength |
At normal conditions |
|
δ=1mm (kW/mm) |
≥ 1,2 |
|
|
|
|
Under action of humidity and temperature |
|
|
≥ 1,1 |
|
|
11 |
Dielectric permeability |
10 GHz |
|
Er |
2,20 (±2%) |
|
|
2,55 (±2%) |
||||||
|
2,65 (±2%) |
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|
|
||||||
|
3,00 (±2%) |
||||||
|
|
||||||
|
3,50 (±2%) |
||||||
|
12 |
Dielectric loss tangent |
10 GHz |
|
tgδ |
≤5 х 10-4 |
|
|
13 |
Sheet appearance |
Foil surface on sheets smooth, without blisters and wrinkles. Permitted are annealing colors and two-tone appearing under temperature influences, pitted surface, scratch marks and other small defects not breaching foil integrity. Foil peeling and absence on sheet perimeter is permitted at distance from edge not exceeding 5% of adjacent side length. |
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Call us by telephone +7 (342) 259-07-74 to learn more on products available, prices and delivery terms.
Or submit telephone / email address through a form at our site, and our manager will contact You.
