Electronic & Electrochemical Materials

GORE-SHIELD® SMT Compatible EMI Gaskets

GORE-SHIELD® Surface Mount Compatible EMI Gaskets

GORE-SHIELD® SMT EMI Gaskets consist of a high performance, electrically conductive elastomeric gasket that is securely fastened to a solderable metal base. These gasket building blocks are placed in series and soldered to the ground trace of a printed circuit board (PCB) to form a complete EMI shielding gasket.


GORE-SHIELD® SMT EMI Gasket building blocks have been developed to suppress electromagnetic radio frequency interference in electronic devices where inter-cavity shielding is critical.

Features and Benefits

  • Low cost EMI gasket solution
  • High Shielding Effectiveness
  • 8-10 parts / second assembly time
  • Quick design cycles
  • Flexible design allowing cost reduction
  • Available in standard EIA tape-and-reel packages
  • No curing required
  • Standard part sizes
  • Repairable
  • Flame retardant
  • Simplified supply chain
  • Standard PCB component
  • Consistent, repeatable installation
  • Compatible with standard and lead-free solder reflow
  • Survives multiple reflow operations

Design Data

EMI gasket performance is crucial for many designs. The key factors to look for in a gasket include how it performs after Accelerated Life Testing (ALT) and how it performs after opening and closing of the gasketed seal (some gaskets only work once). It is important to note that measuring a low DC resistance value for an EMI gasket will not guarantee a high RF shielding value. Several other factors must be taken into account when designing for a good EMI shield. These factors include controlled gasket thickness/flatness, gasket conformability, contact area, conductive particle distribution, mechanical properties of the enclosure. All play an integral role in good EMI performance.

Designing GORE-SHIELD® SMT EMT Gaskets for the PCB shield is very simple. Gore application engineers can quickly advise you how best to lay out the gasket design so to optimize the number of GORE-SHIELD® SMT EMI Gasket pads required.

Samples are available upon request.

Covered by One or More of the Following Patents:

US 6,255,581 B1
US 7,129,421 B2
US 6,210,789 B1

Other US Patents Pending
Corresponding Foreign Patents Issued and Pending

GORE-SHIELD® Supersoft SMT EMI Gasket Parts

Nominal properties (mm unless otherwise specified)

Gore Part number 25SMT-4442- Length Width Thickness Carrier Tape Width x Pitch Parts per Reel RCS* Resistance at RCS (mOhm)
-01 3.6 1.7 1.6 12x4 6,500 1.35 29
-03 3.6 2.6 2.4 12x4 6,500 1.95 35
-04 8.1 2.5 2.5 16x4 6,500 1.95 10

GORE-SHIELD® Standard SMT EMI Gasket Parts

Nominal properties (mm unless otherwise specified)

Gore Part number 25SMT-3645- Length Width Thickness Carrier Tape Width x Pitch Parts per Reel RCS* Resistance at RCS (mOhm)
-9 5.50 1.25 0.65 12x4 15,000 0.52 2.0
-10 8.00 1.25 0.65 16x4 15,000 0.52 2.0
-11 12.00 1.25 0.65 24x4 15,000 0.52 2.0
-13 5.50 1.25 0.45 12x4 15,000 0.36 2.0
-14 8.00 1.25 0.45 16x4 15,000 0.36 2.0
-17 5.50 1.10 0.65 12x4 15,000 0.52 2.0
-18 8.00 1.10 0.65 16x4 15,000 0.52 2.0
-21 5.50 1.10 0.45 12x4 15,000 0.36 2.0
-22 8.00 1.10 0.45 16x4 15,000 0.36 2.0
-25 12.00 2.00 0.65 24x4 15,000 0.52 2.0
-26 8.00 2.00 0.65 16x4 15,000 0.52 2.0
-27 5.50 2.00 0.65 12x4 15,000 0.52 2.0
-33 3.20 1.10 0.65 12x4 15,000 0.52 3.0
-34 5.50 0.90 0.45 12x4 15,000 0.36 2.0
-35 8.00 0.90 0.45 16x4 15,000 0.36 2.0
-40 5.50 1.25 0.80 12x4 10,000 0.64 2.0
-41 3.20 1.25 0.80 12x4 10,000 0.64 4.0
-43 3.20 3.20 1.30 12x8 5,000 1.04 3.0
-44 8.00 2.00 1.30 16x4 7,500 1.04 2.0
-46 3.20 3.20 2.00 12x8 2,500 1.60 2.0
-47 8.00 2.25 2.00 16x4 5,000 1.60 2.0
*Recommended Compression Stop

GORE-SHIELD® Supersoft SMT EMI Gaskets and Grounding Pads Data Sheet (71 KB  PDF)

Advantages

  • Inexpensive
  • High shielding effectiveness
  • Low DC resistance
  • Standard sizes
  • Standard EIA tape-and-reel packaging
  • Reflow compatible