EDR-80-063-0500-SC

GORE EMI Shielding GS8000 SERIES Gaskets SOLUTIONS and Grounding Pads Increase package design exibility while maintaining electrical integrity The GS8000 Series of GORE EMI Shielding Solutions improves package design exibility without compromising the electrical performance of the device. Their extended service heights enable these highly compressible materials to maintain consistent conductivity through a wide range of gaps (see Figure 1 and Figure 2). With Gores strong technology focus in materials, the GS8000 Series was developed with a unique conductive foam. The soft conductive-foam construction accommodates surface variations in covers and printed circuit boards, alleviating the need to specify very tight tolerances. This soft construction also makes the GS8000 Series compatible with plastic housings and snap fasteners. This material maintains excellent shielding performance in a trace width as narrow as one millimeter, providing comparable performance to other EMI shielding materials that are three times the Bene ts of GORE EMI Shielding width. With the lower compression or closure force, fewer fasteners Solutions GS8000 Series are needed. Unsurpassed shielding effectiveness and minimal DC resistance with low compressive force and broad range Table 1: Environmental and Mechanical Properties of tolerance take-up Reliable electrical performance over wide range of gap Property Value distances from soft foam construction Temperature range - 45C to 85C Effective shielding performance in trace widths as RoHS Status (lead, cadmium, Pass narrow as one millimeter hexavalent chromium, mercury, bromine) Improved design exibility because of low closure force Flammability in accordance with UL 94 Pass horizontal burn method Halogen levels (measured per BS EN 14582:2007) Available as grounding pads and precision die-cut parts that Chlorine < 50 ppm enable precise, high-volume assembly, the GS8000 Series of Bromine < 50 ppm Fluorine < 50 ppm GORE EMI Shielding Solutions provide maximum cavity-to-cavity Iodine < 50 ppm EMI protection in a smaller size for more design exibility. Typical working range (for grounding pads) 0.15 mm to 2.2 mm ( 0.006 in to 0.087 in) Available as custom die-cut gaskets, strip gaskets, and grounding pads Typical working range (for EMI gaskets) 0.15 mm to 1.4 mm ( 0.006 in to 0.055 in) Typical pressure to recommended 5 to 30 psi compression stop (RCS) Typical Applications Portable electronic devices, mobile phones, and GPS Portable computers Hand-held eld testing equipment Covered by patent No. US 6,309,742GORE EMI Shielding SOLUTIONS Figure 1: Recommended Service Heights for Use Extended Service Heights The GS8000 Series of GORE EMI Shielding Solutions performs well in EMI Gasket Applications in both grounding and EMI shielding applications (Table 3). Gore 1.50 recommends using each variant within a range of service heights 1.40 mm 5 psi 1.35 (gap distances). For shielding applications, Gore recommends a 1.20 smaller service height range than for grounding applications to 1.05 ensure a robust EMI seal. 0.85 mm 20 psi 0.90 The low closure force and broad range of tolerance take-up results in 0.75 multiple product choices for some gap distances. Selecting the most 0.60 mm 15 psi 0.60 0.45 mm 25 psi suitable variant for a given application depends on the following: 0.60 mm 75 psi 0.45 0.50 mm 100 psi Gap distance of the housing that needs to be lled 0.30 0.30 mm 95 psi Compression force required to achieve the speci ed gap distance 0.15 0.15 mm 300 psi Required DC resistance for grounding applications (or required 0.00 GS8000-03A GS8000-063 GS8000-095 GS8000-126 shielding effectiveness for shielding applications) at a speci ed GS8000 Series gap distance Figure 1 and Figure 2 show recommended service heights (gap distances) for each variant. Figure 2: Recommended Service Heights for Use in Grounding Pads Pressure and DC Resistance Four variants of the GS8000 Series provide conductivity when 2.40 compressed to 0.6 mm (0.024 in) however, the amount of pressure 2.20 mm 1 psi 2.25 2.10 and DC resistance varies for each. Table 2 shows the values for each 1.95 of these four variants. 1.80 1.65 1.50 1.40 mm Table 2: Pressure and DC Resistance Values 1.35 5 psi 1.20 mm 5 psi 1.20 at 0.6 mm Gap (data taken from Figures 3 6) 1.05 0.90 mm 5 psi 0.85 mm 0.90 20 psi 0.75 Variants Pressure Required psi (kPa) DC Resistance (ohms) 0.6 mm 7 psi 0.60 mm 0.60 15 psi 0.38 mm 29 psi 0.60 mm 75 psi 0.45 GS8000-03A 7 (48) 0.125 0.50 mm 100 psi 0.30 0.30 mm 95 psi 0.15 GS8000-063 15 (103) 0.03 0.15 mm 300 psi 0.00 GS8000-03A GS8000-063 GS8000-095 GS8000-126 GS8000-095 55 (379) 0.02 GS8000-126 75 (517) 0.01 GS8000 Series Table 3: Product Typical Performance (measured on 5 x 5 mm grounding pads) Pressure to Achieve Initial DC Recovered Compression Stop Variants Weight Compression Resistance Thickness * mm (in) (g) psi (kPa) (ohms) mm (in) High 0.60 (0.024) 7 (48) 0.125 0.70 (0.028) GS8000-03A 0.008 Recommended 0.38 (0.015) 29 (200) 0.027 0.51 (0.020) Low 0.15 (0.006) 300 (2067) 0.004 0.21 (0.008) High 0.90 (0.035) 5 (34) 0.070 1.19 (0.047) GS8000-063 0.010 Recommended 0.60 (0.024) 15 (103) 0.025 0.91 (0.036) Low 0.30 (0.012) 95 (655) 0.007 0.51 (0.020) High 1.20 (0.047) 5 (34) 0.115 1.65 (0.065) GS8000-095 0.011 Recommended 0.85 (0.033) 20 (138) 0.040 1.24 (0.049) Low 0.50 (0.020) 100 (689) 0.010 0.74 (0.029) High 2.20 (0.087) 1 (6.9) 0.240 2.62 (0.103) GS8000-126 0.013 Recommended 1.40 (0.055) 5 (34) 0.150 1.90 (0.075) Low 0.60 (0.024) 75 (517) 0.012 0.94 (0.037) * To measure the recovered thickness, samples were compressed to the compression stop. While compressed, the samples were subjected to a 70C temperature soak for 70 hrs per ASTM D395B. Lastly, the samples were released from compression and allowed to recover for 30 minutes before the recovered thickness was measured. Page 2 Gap Distance (mm) Gap Distance (mm)