LAMINATES & GROUNDING PRODUCTS CHO-FOIL & CHO-FABTM ...

1 1US HeadquartersTEL+(1) 781-935-4850 FAX+(1) 781-933-4318 TEL+(44) 1628 404000 FAX+(44) 1628 404090 Asia PacificTEL+(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 arean economical EMI shielding solutionfor a variety of commercial tapes are available in copper,aluminum, or tinned copper foilbacked with Chomerics highlyconductive pressure-sensitiveadhesive*. Typical properties areshown in Table 1 on the next page,and reliability data appears in Table* Recognized Under the ComponentProgram of Underwriters Laboratories, tape is a corrosionresistant nickel-plated cloth coatedwith Chomerics highly conductivepressure-sensitive adhesive*.

2 CHO-FAB tape is extremely strongand lightweight, and has excellentconformability/wrapability to enhanceshielding performance and appear-ance. Use of corrosion resistant nickel-plated cloth and Chomerics superiormetal-particle-filled conductive adhesive technology produces atape used in a wide variety of EMIshielding and GROUNDING properties are shown in Table1 on the next page, and reliabilitydata appears in Table 4 on page ProcedureRefer to Tables 2 and 3. All CHO-FOIL and CHO-FAB tapes are avail-able in standard 36 yard ( m)rolls or die-cut custom configura-tions. Call Chomerics ApplicationsEngineering Department for assis-tance with a custom on page 148.

3 CHO-FOIL coppertape is available with a non-conduc-tive adhesive for applications requir-ing surface conductivity only. Anembossed version of CHO-FOIL copper tape is also available, for amore attractive appearance up to 6inches (152 mm)wide. Standardlength rolls and die-cut customshapes can be a low impedanceconnection between a braidedcable shield and the metalconnector backshell in moldedcables. An effective EMI shieldedassembly can be achievedwithout soldering the tape tothe braid or backshellnEMI radiation measurementtroubleshooting, using CHO-FOIL tape to shield ventilationslots or seam gapsnProvide electrical continuity inseams of EMI shielded roomsand electronic enclosuresnSupply electrical contact to surfaces that can t be solderedto, such as conductive plasticor aluminumnEMI shield for cables bywrapping the tape aroundthe cable.

4 An overlap isrecommendednESD shieldingnProvide corrosion-resistantground contact pointsnFabric tape available whereweight and flexibility areimportant, such as forwrapping cablesCHO- foil EMI Shielding Tapewith Conductive Adhesive(Copper, Aluminum or Tinned Copper)CHO-FAB EMI ShieldingFabric Tape withConductive AdhesiveTypical Applications for CHO-FOILand CHO-FAB EMI Shielding TapesLAMINATES & GROUNDING PRODUCTSCHO- foil & CHO-FABTMS hielding TapesUS HeadquartersTEL+(1) 781-935-4850 FAX+(1) 781-933-4318 TEL+(44) 1628 404000 FAX+(44) 1628 404090 Asia PacificTEL+(852) 2 428 8008 FAX +(852) 2 423 8253 South America TEL+(55) 11 3917 1099 FAX +(55) 11 3917 08172 Table 2 TAPE WIDTH CODES (ZZZZ) inch (mm)PART NUMBERTAPE DESCRIPTIONCCH 36 101 ZZZZC opper foil , conductive adhesive versionCCE 36 101 ZZZZC opper foil , conductive adhesive, embossedCCJ 36 201 ZZZZA luminum foil , conductive adhesiveCCK 36 101 ZZZZTin-plated copper foil , conductive adhesiveCCD 36 101 ZZZZC opper foil , conductive adhesive 2 sidesCAD 36 201 ZZZZA luminum foil , conductive adhesive 2 sidesCFT 36 101 ZZZZN ickel-plated fabric, conductive ( )( )( )( )( )(102)(152)(203)(305)(610)

5 Table 3 PropertyTest MethodTypical ValuesPart Number Prefix CCHCCECCJCCKCCDCADCFTFoil/Fabric Type 1 oz. EmbossedAluminum1 oz. Tin-1 Nickel-PlatedRA CopperRA CopperPlated CopperRA CopperFabricFoil/Fabric Thickness, ( ) ( )2 ( ) ( ) ( )2 ( )5 ( )mils (mm)Adhesive Type Electrically Conductive, Acrylic Pressure- SensitiveAdhesive Thickness, ( )2 sides:mils (mm) each ( each) ( )Total Thickness, ( )4* ( ) ( ) ( ) ( )5 ( ) ( )mils (mm)Temperature Range,__ 40 to 400 40 to 180 F ( C)( 40 to 205)( 40 to 82)Electrical Resistance,MIL-STD-202C < (< )(< )< (< )< (< ) < (< )< (< )< (< )ohms/in2 (ohms/cm2)Flame ResistanceUL Subject 510 PASSMEETSPASSPASSMEETSMEETSN/AAdhesion to AluminumASTM D1000 >40 [ ] (438) [ppi] (N/m)

6 PROPERTIES< Table 1 Slit rolls are available through Chomerics' authorized consult Chomerics Applications Engineering Departmentfor assistance with a custom application involving a need for material in other than slit roll widths available up to 24 inches (61 cm)*Embossing adds mil3US HeadquartersTEL+(1) 781-935-4850 FAX+(1) 781-933-4318 TEL+(44) 1628 404000 FAX+(44) 1628 404090 Asia PacificTEL+(852) 2 428 8008 FAX +(852) 2 423 8253 South America TEL+(55) 11 3917 1099 FAX +(55) 11 3917 0817 TestTest MethodCCHCCECCJCCKCCDCADCFTI nitial Surface Resistivity (SR) (milliohms)*CHO-TP-57**<2<2<2<2N/AN/A<10 0 Initial Through Resistivity (TR) (milliohms)*CHO-TP-57**<3<3<35<2<15**<10 0**<100 Initial Peel Strength in [ppi] (N/m) **ASTM [ ] (490)[ ] (490) [ ] (560) [ ] (508)[3] (525)[ ] (710)[ ] (490)Initial Taber Abrasion Surface Resistivity(SR) (milliohms)CHO-TP-57**<6<3<6<9N/AN/A<100 Heat AgingSR (milliohms)*CHO-TP-57**<10<2<20<2N/AN/A< 100185 F (85 C)/TR (milliohms)*CHO-TP-57**<16<3<22<2<7**<60 **<150168 , [ppi] (N/m) **ASTM [ ] (630)[ ] (683)[8] (840)[ ] (735)[ ] (805)[ ] (840)[ ] (648)Heat AgingSR (milliohms)*CHO-TP-57**<10<3<20<2N/AN/A< 100250 F (121 C)/TR (milliohms)

7 *CHO-TP-57**<70<3<23<2<3**<10**<150168 , [ppi] (N/m) **ASTM [ ] (630)[ ] (648) [ ] (823) [ ] (560)[ ] (770)[ ] (928)[ ] (473)Heat Aging withSR (milliohms)*CHO-TP-57**N/AN/AN/A<2N/AN/A <100 Humidity 95% RH/TR (milliohms)*CHO-TP-57**N/AN/AN/A<2<115** <150**<150185 F (85 C)/Peel, [ppi] (N/m) **ASTM D1000N/AN/ [ ] (858)[ ] (858)[ ] (928)[ ] (508)Salt fog corrosion/SR (milliohms)*CHO-TP-57**N/AN/AN/A<2N/AN/A <100168 (milliohms)*CHO-TP-57**N/AN/AN/A<2<275** <600**<1000 Peel, [ppi] (N/m) **ASTM D1000N/AN/ [ ] (840)[ ] (683)[5] (875)[ ] (368)Taber abrasionSR (milliohms)*CHO-TP-57**<3<5<2<6N/AN/A<17 5500 gramweight,CS-10 wheel,500 cyclesN/A = Not Applicable* All measurements of surface resistivity and through resistivity made at ambient temperature with tapes mounted on tinned coppersubstrate, except for taber abrasion where a plastic substrate was used.

8 ** 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 DATAT able 4 NOTE:The following table represents actual experimental test data taken according to Chomericsinternal test procedures. This data differs from Table 1 due to differences in test our ApplicationsEngineering Department todiscuss your & CHO-FAB Tapescontinu