C-20 PS Copper Foil / Polyester Film EMI-RFI Shielding Tape (Solderable)
C-20 PS is a heavy-duty copper foil and polyester film laminate pressure-sensitive tape whose copper shield is solderable when done with care, combining a 0.0014″ copper foil, 0.00048″ polyester film, and 0.001″ acrylic adhesive for a total thickness (without liner) of 0.0031″ +/- 10%. It delivers signal attenuation of 115 dB @ 100 MHz, peel strength of 32 oz/inch of width, and dielectric strength of 3,900 volts. The solderable copper surface allows direct electrical connections to be made to the shield where a fabricated ground or bond point is required.
Key Properties
- Peel Strength: 32 oz/inch of width (ASTM-D-1000)
- Signal Attenuation: 115dB @ 100 MHz (ASTM D4935-99)
- Dielectric Strength: 3,900 volts (ASTM D149)
- Total Thickness: 0.0031″ +/- 10% (PSTC-33)
- Release Liner: 90#
- Color: Copper
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Copper Foil Thickness | 0.0014″ | — |
| Polyester Film Thickness | 0.00048″ | — |
| Adhesive Thickness | 0.001″ | — |
| Release Liner | 90# | — |
| Thickness (w/o liner) | 0.0031″ +/- 10% | PSTC-33 |
| Color | Copper | — |
| Shelf Life | 1 year @ 70°F(21°C)/50% R.H. | — |
Mechanical Properties
| Property | Value | Test Method |
| Peel Strength | 32 oz/inch of width | ASTM-D-1000 |
Electrical Properties
| Property | Value | Test Method |
| Signal Attenuation | 115dB @ 100 MHz | ASTM D4935-99 |
| Dielectric Strength | 3,900 volts | ASTM D149 |
- Shielding electronic enclosures against EMI/RFI interference
- Maintaining shielding continuity across cable and connector assemblies
- Forming solderable shielding connections for fabricated ground points
- Protecting PCB and component assemblies from electromagnetic interference
- Providing high-attenuation shielding for sensitive electronic devices
Common industries: Electronics manufacturing, telecommunications, aerospace and defense electronics, PCB assembly and fabrication, industrial controls.
C-20 PS is a heavy-duty laminate built from a 0.0014″ copper foil, a 0.00048″ polyester film carrier, and a 0.001″ acrylic pressure-sensitive adhesive, designed for demanding EMI and RFI shielding applications. The thicker copper layer, relative to standard-duty grades, supports higher current-carrying shielding paths, while the polyester film adds mechanical stability to the laminate during handling and conversion.
A distinguishing characteristic of this grade is that the copper shield can be soldered directly, provided the operation is performed with care, enabling fabricated ground connections in addition to adhesive bonding. The tape is supplied with a 90# release liner in a copper finish, and carries a shelf life of one year when stored at 70°F (21°C) and 50% relative humidity. The manufacturer’s TDS does not list tensile or elongation data for this grade.
What differentiates C-20 PS from other tape grades in the line?
C-20 PS is a heavy-duty grade whose copper shield is solderable when done with care, a capability not offered by standard grades such as C-13 PS or C-38 PS. This allows the tape to serve both as an adhesive shield and as a substrate for a soldered ground connection, while still delivering high 115 dB attenuation at 100 MHz.
Why is peel adhesion important for C-20 PS?
C-20 PS carries a 32 oz/inch of width peel rating (ASTM-D-1000). Because the copper surface may also be soldered, a dependable adhesive bond is what keeps the tape correctly positioned and in continuous electrical contact with the substrate both before and after any soldering operation.
What is the storage range for C-20 PS?
The TDS specifies a shelf life of 1 year when stored at 70°F (21°C) and 50% relative humidity.
Is C-20 PS suitable for FCC-regulated EMI/RFI shielding environments?
No compliance standard is specified on the manufacturer's TDS for C-20 PS. Measured attenuation performance (115 dB @ 100 MHz per ASTM D4935-99) is provided, but suitability for a specific FCC-regulated application should be confirmed against the relevant project requirements.
How should C-20 PS be specified?
Specify grade (C-20 PS), thickness, color, adhesive type, liner type, compliance requirements, dimensional tolerances, and finished format.
