C-38 PS Copper Foil / Polyester Film EMI-RFI Shielding Tape
C-38 PS is a copper foil and polyester film laminate pressure-sensitive tape built from a 0.0007″ copper foil, 0.003″ polyester film, and 0.001″ acrylic adhesive for a total construction of 0.0048″. It delivers signal attenuation of 105 dB @ 100 MHz, peel strength of 32 oz./inch of width, and a high dielectric strength of 10,200 volts. A high 95% elongation at break gives the laminate strong conformability across irregular surfaces during application.
Key Properties
- Peel Strength: 32 oz./inch of width (ASTM-D-1000)
- Signal Attenuation: 105dB @ 100 MHz (ASTM D4935-99)
- Tensile Strength: 12,500 P.S.I. (ASTM-D-882)
- Dielectric Strength: 10,200 volts (ASTM D149)
- Total Thickness: 0.0048″ (ASTM-D-3652)
- Elongation at Break: 95% (ASTM-D-882)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Copper Foil Thickness | 0.0007″ | — |
| Polyester Film Thickness | 0.003″ | — |
| Adhesive Thickness | 0.001″ | — |
| Release Liner | 90 lb. | — |
| Total Thickness | 0.0048″ | ASTM-D-3652 |
| 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 |
| Tensile Strength | 12,500 P.S.I. | ASTM-D-882 |
| Elongation at Break | 95% | ASTM-D-882 |
Electrical Properties
| Property | Value | Test Method |
| Signal Attenuation | 105dB @ 100 MHz | ASTM D4935-99 |
| Dielectric Strength | 10,200 volts | ASTM D149 |
- Shielding electronic enclosures against EMI/RFI interference
- Maintaining shielding continuity across cable and connector assemblies
- Establishing grounding and static drain paths within electronic assemblies
- 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, consumer electronics, industrial controls.
C-38 PS is a laminate construction combining a 0.0007″ copper foil with a 0.003″ polyester film carrier and a 0.001″ acrylic pressure-sensitive adhesive, engineered for EMI and RFI shielding of electronic enclosures and assemblies. The thin copper foil forms the conductive shielding layer, the thicker polyester film provides mechanical support and dimensional stability, and the acrylic adhesive delivers a strong, lasting bond to substrate surfaces.
The tape is supplied with a 90 lb. 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. Its high 95% elongation at break, paired with a 10,200-volt dielectric rating, makes it well suited to applications that combine irregular geometries with a need for strong electrical isolation.
What differentiates C-38 PS from other tape grades in the line?
C-38 PS combines a high 10,200-volt dielectric strength with a standout 95% elongation at break, giving it markedly more conformability than lower-elongation grades like C-13 PS or C-35 PS, while still delivering solid 105 dB attenuation at 100 MHz for shielding on contoured surfaces.
Why is peel adhesion important for C-38 PS?
C-38 PS is rated at 32 oz./inch of width peel strength (ASTM-D-1000), keeping the highly elongatable laminate firmly seated against the substrate as it stretches and conforms to irregular surfaces. Reliable adhesion is what prevents the tape from lifting or shifting once formed into place.
What is the storage range for C-38 PS?
The TDS specifies a shelf life of 1 year when stored at 70°F (21°C) and 50% relative humidity.
Is C-38 PS suitable for FCC-regulated EMI/RFI shielding environments?
No compliance standard is specified on the manufacturer's TDS for C-38 PS. Measured attenuation performance (105 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-38 PS be specified?
Specify grade (C-38 PS), thickness, color, adhesive type, liner type, compliance requirements, dimensional tolerances, and finished format.
