1 us headquar ters tel +(1) 781-935-4850 fax +(1) 781-933-4318 ? www .chomerics.com eur ope tel +(44) 1628 404000 fax +(44) 1628 404090 asia pacific tel +(852) 2 428 8008 fax +(852) 2 423 8253 south america tel +(55) 11 3917 1099 fax +(55) 11 3917 0817 chomerics cho-foil tapes are an economical emi shielding solution for a variety of commercial uses. the tapes are available in copper, aluminum, or tinned copper foil backed with chomerics highly conductive pressure-sensitive adhesive*. typical properties are shown in table 1 on the next page, and reliability data appears in table * recognized under the component program of underwriters laboratories, inc. cho-fab tape is a corrosion resistant nickel-plated cloth coated with chomerics highly conductive pressure-sensitive adhesive*. cho-fab tape is extremely strong and lightweight, and has excellent conformability/wrapability to enhance shielding performance and appear- ance. use of corrosion resistant nickel- plated cloth and chomerics superior metal-particle-filled conductive adhesive technology produces a tape used in a wide variety of emi shielding and grounding applications. typical properties are shown in table 1 on the next page, and reliability data appears in table 4 on page 148. ordering procedure refer to tables 2 and 3. all cho- foil and cho-fab tapes are avail- able in standard 36 yard (32.9 m) rolls or die-cut custom configura- tions. call chomerics applications engineering department for assis- tance with a custom configuration. 4 on page 148. cho-foil copper tape is available with a non-conduc- tive adhesive for applications requir- ing surface conductivity only. an embossed version of cho-foil copper tape is also available, for a more attractive appearance up to 6 inches (152 mm) wide. standard length rolls and die-cut custom shapes can be ordered. n provide a low impedance connection between a braided cable shield and the metal connector backshell in molded cables. an effective emi shielded assembly can be achieved without soldering the tape to the braid or backshell n emi radiation measurement troubleshooting, using cho- foil tape to shield ventilation slots or seam gaps n provide electrical continuity in seams of emi shielded rooms and electronic enclosures n supply electrical contact to surfaces that cant be soldered to, such as conductive plastic or aluminum n emi shield for cables by wrapping the tape around the cable. an overlap is recommended n esd shielding n provide corrosion-resistant ground contact points n fabric tape available where weight and flexibility are important, such as for wrapping cables cho-foil emi shielding tape with conductive adhesive (copper, aluminum or tinned copper) cho-fab emi shielding fabric tape with conductive adhesive typical applications for cho-foil and cho-fab emi shielding tapes laminates & grounding products cho-foil ? & cho-fab tm shielding tapes
us headquar ters tel +(1) 781-935-4850 fax +(1) 781-933-4318 ? www .chomerics.com eur ope tel +(44) 1628 404000 fax +(44) 1628 404090 asia pacific tel +(852) 2 428 8008 fax +(852) 2 423 8253 south america tel +(55) 11 3917 1099 fax +(55) 11 3917 0817 2 table 2 tape width codes (zzzz) inch (mm) part number tape description cch C 36 C 101 C zzzz copper foil, conductive adhesive version cce C 36 C 101 C zzzz copper foil, conductive adhesive, embossed ccj C 36 C 201 C zzzz aluminum foil, conductive adhesive cck C 36 C 101 C zzzz tin-plated copper foil, conductive adhesive ccd C 36 C 101 C zzzz copper foil, conductive adhesive 2 sides cad C 36 C 201 C zzzz aluminum foil, conductive adhesive 2 sides cft C 36 C 101 C zzzz nickel-plated fabric, conductive adhesive 0050 0100 0150 0200 0300 0400 0600 0800 1200 2400 0.5 1.0 1.5 2.0 3.0 4.0 6.0 8.0 12 24 (12.7) (25.4) (38.1) (50.8) (76.2) (102) (152) (203) (305) (610) table 3 p roperty test method typical values part number prefix cch cce ccj cck ccd cad cft foil/fabric type 1 oz. 1 oz. embossed aluminum 1 oz. tin- 1 oz. aluminum nickel-plated ra copper ra copper plated copper ra copper fabric foil/fabric thickness, 1.4 (0.0356) 1.4 (0.0356) 2 (0.0508) 1.6 (0.0406) 1.4 (0.0356) 2 (0.0508) 5 (0.127) mils (mm) adhesive type electrically conductive, acrylic pressure- sensitive adhesive thickness, 1.5 (0.0381) 2 sides: mils (mm) 1.5 each (0.0381 each) 1.5 (0.0381) total thickness, 2.9 (0.0737) 4* (0.1102) 3.5 (0.0889) 3.1 (0.0787) 4.4 (0.1118) 5 (0.127) 6.5 (0.165) mils (mm) temperature range, __ ?0 to 400 ?0 to 180 f ( c) (?0 to 205) (?0 to 82) electrical resistance, mil-std-202c <0.003 (<0.0005) (<0.0005) <0.010 (<0.0016) <0.010 (<0.0016) <0.010 (<0.0016) <0.003 ( <0.0005) <0.100 (<0. 016) ohms/in 2 (ohms/cm 2 ) flame resistance ul subject 510 pass meets pass pass meets meets n/a adhesion to aluminum astm d1000 >40 [2.5] (438) oz./inch [ppi] (n/m) properties <0.003 table 1 slit r olls ar e available thr ough chomerics' authorized distributors. please consult chomerics applications engineering depar tment for assistance with a custom application involving a need for material in other than slit r oll for m. continued custom widths available up to 24 inches (61 cm) *embossing adds 1.1 mil
3 us headquar ters tel +(1) 781-935-4850 fax +(1) 781-933-4318 ? www .chomerics.com eur ope tel +(44) 1628 404000 fax +(44) 1628 404090 asia pacific tel +(852) 2 428 8008 fax +(852) 2 423 8253 south america tel +(55) 11 3917 1099 fax +(55) 11 3917 0817 test test method cch cce ccj cck ccd cad cft initial surface resistivity (sr) (milliohms)* cho-tp-57*** <2 <2 <2 <2 n/a n/a <100 initial through resistivity (tr) (milliohms)* cho-tp-57*** <3 <3 <35 <2 <15**** <100**** <100 initial peel strength in oz./inch [ppi] (n/m) ** astm d1000 44.8 44.8 51.2 46.4 48 70.4 44.8 [2.8] (490) [2.8] (490) [3.2] (560) [2.9] (508) [3] (525) [4.4] (710) [2.8] (490) initial taber abrasion surface resistivity (sr) (milliohms) cho-tp-57*** <6 <3 <6 <9 n/a n/a <100 heat aging sr (milliohms)* cho-tp-57*** <10 <2 <20 <2 n/a n/a <100 185 f (85 c)/ tr (milliohms)* cho-tp-57*** <16 <3 <22 <2 <7**** <60**** <150 168 hrs. peel, oz./in. [ppi] (n/m) ** astm d1000 57.6 62.4 76.8 67.2 73.6 78.4 59.2 [3.6] (630) [3.9] (683) [8] (840) [4.2] (735) [4.6] (805) [4.8] (840) [3.7] (648) heat aging sr (milliohms)* cho-tp-57*** <10 <3 <20 <2 n/a n/a <100 250 f (121 c)/ tr (milliohms)* cho-tp-57*** <70 <3 <23 <2 <3**** <10**** <150 168 hrs. peel, oz./in. [ppi] (n/m) ** astm d1000 57.6 59.2 75.2 51.2 70.4 84.8 43.2 [3.6] (630) [3.7] (648) [4.7] (823) [3.2] (560) [4.4] (770) [5.3] (928) [2.7] (473) heat aging with sr (milliohms)* cho-tp-57*** n/a n/a n/a <2 n/a n/a <100 humidity 95% rh/ tr (milliohms)* cho-tp-57*** n/a n/a n/a <2 <115**** <150**** <150 185 f (85 c)/ peel, oz./in. [ppi] (n/m) ** astm d1000 n/a n/a n/a 78.4 78.4 84.8 46.4 [4.9] (858) [4.9] (858) [5.3] (928) [2.9] (508) salt fog corrosion/ sr (milliohms)* cho-tp-57*** n/a n/a n/a <2 n/a n/a <100 168 hrs. tr (milliohms)* cho-tp-57*** n/a n/a n/a <2 <275**** <600**** <1000 peel, oz./in. [ppi] (n/m) ** astm d1000 n/a n/a n/a 76.8 62.4 80 33.6 [4.8] (840) [3.9] (683) [5] (875) [2.1] (368) taber abrasion sr (milliohms)* cho-tp-57*** <3 <5 <2 <6 n/a n/a <175 500 gramweight, cs-10 wheel, 500 cycles n/a = not applicable * all measurements of surface resistivity and through resistivity made at ambient temperature with tapes mounted on tinned coppe r substrate, except for taber abrasion where a plastic substrate was used. ** 90 peel strength tests were done on an instron at 2 inches per minute with tapes on a 2024 aluminum substrate. *** cho-tp-57 available from chomerics on request. **** through resistivity measurement of double sided adhesive tapes done with tapes flanged between 2024 aluminum substrates. reliability data table 4 note: the following table represents actual experimental test data taken according to chomerics internal test procedures. this data differs from table 1 due to differences in test methods. contact our applications engineering department to discuss your requirements. cho-foil ? & cho-fab ? tapes continued
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