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STF |
| Parameters |
Test conditions |
Guaranteed values |
Typical values |
| Temperature |
| Glass transition temperarure, Òg, o C |
|
|
>110± 5 |
| Electrical |
| Permittivity at 1MHz |
Ñ - 40/23/50 |
4,7 |
4,7 |
| Dissipation Factor at 1MHz |
Ñ - 40/23/50 |
0,017 |
0,017 |
| Surface Resistivity (Ohms), not less than |
Å - 1/125 |
5 x 1010 |
5 x 1010 |
| Volume Resistivity, not less than |
Å - 1/125 |
7,0 x 109 |
7,0 x 109 |
| Physical |
| Peel Strength, N/mm, not less than |
after heat shock (260 o Ñ/30 sec) |
5,6 |
5,6 |
| after plating |
5,4 |
5,4 |
| Solder Float, sec, not less than |
260 o Ñ |
30 |
30 |
| Bow/twist, %, not less than |
normal conditions |
2,3 |
2,3 |
| Moisture absorption, not more than |
D - 24/23 |
14,8 |
14,8 |
| boiling resistance, hour |
normal conditions |
1,5 |
1,5 |
| punching |
|
1,0 |
1,0 |
| Sheet sizes, mm |
|
1180õ1030, 1220õ1020,
1100x1000, 1010x900 |
1180õ1030, 1220õ1020,
1100x1000, 1010x900 |
| Thickness, mm |
|
0,8-3,0 |
| Identification symbol |
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