High Performance Silver Connectors
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FUJIPOLY low resistance ZEBRA® elastomeric connectors are constructed of alternating parallel layers of electrically conductive and non-conductive silicone elastomer. The electrically conductive layer is filled with silver-metal particles. The composite alternating layers provide reliable electrical connection when placed between two aligned conducting surfaces.
The low resistance ZEBRA® provides a redundant connection with a minimum of two conductive layers recommended per PC contact pad. The connector is available with insulating barrier or silicone supports (See page 6). The connectors are used for connecting electroluminescent (EL) and plasma type displays to PC boards or for connecting hybrid circuits to PC boards, among other applications.
Low resistance ZEBRA® connectors are positioned between two aligned surfaces and are mechanically clamped together with a lid or another PC board. The connectors may be free standing or positioned in a retainer depending on packaging profiles and design.
| Series | Contact Spacing Center-to-Center | Pitch: Sum of the Thickness of an Adjacent Conductiveand Non-conductive Layer |
Conductive Layers per inch | Individual Conductive and Insulating Layer Thickness | Available Lengths | ||
|---|---|---|---|---|---|---|---|
| Minimum | Nominal | Maximum | Minimum | Minimum | Maximum | ||
| 5002 (SZ100) |
0.015 in. 0.38 mm |
0.004 in. 0.100 mm |
0.006 in. 0.152 mm |
240 | 0.001 in. 0.025 mm |
0.003 in. 0.075 mm |
5.00 in. 127 mm |
TABLE A (For requirements over 4” consult factory)
| Measurement | Tolerance (inches/mm) |
|---|---|
| Length=L | 0.250 ± 0.005 in. to 5.000 ± 0.025 in. .............../................ 6.35 ± 0.12mm to 127.00 ± 0.64mm |
| Height=H | 0.040 ± 0.003 in. to 0.500 ± 0.007 in. .............../................ 1.00 ± 0.08mm to 12.70 ± 0.18mm |
| Width=W | 0.020 ± 0.003 in. to 0.100 ± 0.005 in. .............../................ 0.50 ± 0.08mm to 2.54 ± 0.13mm |
TABLE B
| ZEBRA® Connectors | Temperature Range | Current Carrying Capacity 0.040” x 0.040” pad |
Resistance Between Layers | |
|---|---|---|---|---|
| Minimum | Maximum | |||
| Silver ZEBRA® | -40°F | 185°F | 0.3 amps | 1012 ohms |
| -40°C | 85°C | |||
TABLE C
Self-Support and Insulation Barrier
Details show silicone support (left) and insulation barrier (right). Each is available on one or both sides. Configurations may also include support on one side and insulation on the other.
Note: Recommended Height (H) should be twice Width (W) dimension for minimum force deflection. Maximum Skewness 2% of Height.
Design Recomendations
Recommended deflection range is 5-25% of free height. Minimum deflection will vary with packaging applications and should consider overall height, PC board warpage, finish, etc.(Contact FUJIPOLY Product Application Engineering for assistance.) Design recommendations for solid ZEBRA® over 0.400” deflect 0.050” maximum. Silicone supported over 0.400” deflect 0.060” typical.
Test Conditions
The use of an insulating barrier or silicone self-support material on one or both sides of the connector is recommended. The silicone support is utilized to reduce clamp force and provide an element of environmental protection for a cost-effective connection.
| Item | Standard | Test Method |
|---|---|---|
| High Temperature | MIL-202D-108A | 85° C 1500 hr |
| Low Temperature | — | -40° C 500 hr |
| Moisture | MIL-202D-103B | 40° C 95% RH x 500 hr (250mA/pad) |
| Thermal cycle | MIL-202E-107G | 65°C/25°C/150°C/ 25°C, 5 cycles |
Nominal Resistance Calculation
For the purpose of calculating the resistance of silver ZEBRA® connectors and testing them for compliance please use the following formula:
| Where: |
| R = Resistance in Ohms W1- = Width of ZEBRA® portion (inches or mm) Ew = Electrode pad width (inches or mm) H = ZEBRA® height (inches or mm) |
| Metric (mm) | ||
| R = | H x 0.01 | + 0.10 |
| EwxW1 | ||
| English (inches) | ||
| R = | H x 0.0004 | + 0.10 |
| EwxW1 | ||
Example: if ZEBRA® is 0.100 /2.54 mm H and 0.030 /0.762mm W, then the maximum resistance on a 0.050 /1.27 mm wide pad will be:
| Metric: | ||
| R = | 2.54 x 0.01 | + 0.10 = 0.127 ohms |
| 0.762 x 1.27 | ||
| English: | ||
| R = | 0.100 x 0.0004 | + 0.10 = 0.127 ohms |
| 0.030 x 0.050 | ||
Nominal Force Deflection Plain ZEBRA® or Insulation Barrier Type
ZEBRA® connectors should be deflected 5% to 25% of H. To calculate F-Force for deflection, use the following formula:
| Where: | |
| F = | Force (N) |
| D = | H - H1 x 100 (%) |
| H | |
| H = | Height of connector (mm or inches) |
| H1 = | Deflected height of connector (mm or inches) |
| W = | Width of connector (mm or inches) |
| W1 = | Width of ZEBRA portion (mm or inches) |
| L = | Length of connector (mm or inches) |
Metric:
F(N) = 9 x D x W x L x 9.8 x 10-3
Inches:
F(N) = 5806 x D x W x L x 9.8 x 10-3
Nominal Force Deflection - Silicone Support Type
Metric:
F(N) = [(9 x D x W1 xL) + {2.2 x D x (W-W1) x L}] x 9.8 x 10-3
Inches:
F(N) = [(5806 x D x W1 x L) + {1419 x D x (W-W1) x L}] x 9.8 x 10-3
Part Number and Nomenclature:
To specify a connector to your exact requirements, substitute the metric measurements for width, length and height according to instructions below; example part# Ag(2.0 IB1 x 20 x 2.0)-U;
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