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Carbon Connectors

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FUJIPOLY connectors (see figure 1) have alternating layers ZEBRA® of conductive carbon-filled and non-conductive silicone rubber. They make reliable connections by being deflected between contacting surfaces. ZEBRA® connectors are used for connecting any LCD from small displays for watches to large area displays for instruments. Table A shows the different types of ZEBRA® connectors available. Table C shows performance characteristics.

Figure 1.

Figure 1 shows the three dimensions of the ZEBRA® connector. When ordering, the three dimensions should be specified within the limits shown in table B.

For best overall performance, ZEBRA® connectors must be ordered and used with a ratio of H/W equal to or greater than 1.5.

 LCD contact spaceing center-to-centerPitch: Sum of the Thickness of an Adjacent Conductive and Non-conductive Layer Conductive Layers per inchIndividual Conductive and Insulating Layer ThicknessAvailable
Lengths
Series Minimum Nominal Maximum Minimum Minimum Maximum Maximum
CZ410/CZ710 0.38 mm 0.10 mm 0.15 mm 240 0.025 mm 0.10 mm 230 mm
CZ418 0.50 mm 0.18mm 0.25 mm 140 0.050 mm 0.15 mm 230 mm
CZ405/CZ705 0.25 mm 0.050 mm 0.10 mm 500  0.010 mm 0.060 mm 230 mm

TABEL A

MeasurementTolerance (mm)
Length=L 4.00 mm to 61.00 mm — ± 0.20 mm
61.2 mm to 152.4 mm — ± 0.38 mm
152.6 mm to 200.0 mm — ± 0.50 mm
Height=H 0.50 mm to 19mm ± 0.127 mm
Width=W 0.38 mm to 1.0 mm — ± 0.050 mm
1.01 mm to 2.0 mm — ± 0.076 mm
2.01 mm to 3.0 mm — ± 0.127 mm
above 3.00 mm consult factory.

TABLE B

ZEBRA® ConnectorsTemperature RangeCurrent Carrying Capacity
0.040” x 0.040” pad
Resistance Between Layers
Minimum Maximum
Carbon -40°F
-40°C
212°F
100°C
0.005 amps 1012 ohms

TABLE C

Figure 2 Recommended Height(H)should be 1.5x Width(W)dimension for minimum force deflection. Maximum Skewness 2% of Height.

Figure 3

ZEBRA® Connector Dimensions

Figure 2 shows the three dimensions of the ZEBRA® connector. When ordering, the three dimensions should be specified within the limits shown in Table B. For best overall performance, ZEBRA® connectors must be ordered and used with a ratio of H/W equal to or greater than 1.5. 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.

ZEBRA® CONNECTOR INSULATING BARRIER

DescriptionInsulating Barrier
Color (one only) White
Hardness, Durometer A 30
Dielectric Strength volts/mil. 500
Resistance, ohms 1012
Insulating Barrier Width (B) mm*

0.050 ± 0.025

TABLE D *The tolerance of W1 is equal to the sum of the tolerances of W.

Nominal Resistance Calculation

To calculate the resistance of the ZEBRA® connector use the following formulas:

Where:
Cw = Contact pad width in inches
H = ZEBRA® connector height in inches
W = ZEBRA® connector width in inches
Metric:
R = 60 x H
Ew x W
Where:
R = Resistance (Ω)
Ew = Electrode Pad width (mm)
W = Connector width (mm)
H = Connector height (mm)

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)
H1 = Deflected height of connector (mm)
W = Width of connector (mm)
W1 = Width of ZEBRA portion (mm)
L = Length of connector (mm)
Metric:
F(N) = 9 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