SMT EMI SHIELDING GASKET
CHARACTERISTICS
- RoHS compliant
- UL94V-0
- Halogen Free
- Available in SMT/Low surface resistance
- Soldering compatible/Hardness can be adjusted
- Smooth Surface of the alloy foil skin allows easy replacement by a pick & place equipment, and compatible for reflow tunnel efficient mass production using surface mounting equipment electrical conductivity is superior than existing fiber type of foam gasket and finger strip gasket.
- Excellent resilience without bended or broken problem
- Available in conductive cushioning material as adjusting varying hardness by custom made
MERIT FOR OTHER ITEMS
Property | SMF Gasket | SMD type Finger Gasket | Gound Foam gasket |
---|---|---|---|
Compression recovery rate | High | Low | High |
Surface resistance | Low | Low | Middle |
Gound Contact Part | Face | Dot/Line | Face |
Eco-friendly | Halogen free | Regulation of BeCu | Halogen free |
HOW TO ORDER
(1) Surface-Mounting Foam gasket
(2) Manufacturer's No. (Ex. 01,02,03...)
(3) Width (Ex. 040 : 4mm)
(4) Thickness (Ex. 035: 3.5mm)
(5) Length (Ex. 030 : 3mm)
STUCTURE AND SIZE LIST
RECOMMENDED DESIGE
(Unit:mm)
SMF Size | PCB Pattern | Solder Land | Metal Mask Thickness | |||
---|---|---|---|---|---|---|
W | L | PW | PL | SW | SG | |
4.0 | 3.0 | 4.5 | 3.5 | 1.5 | 1.5 | 0.15 |
5.0 | 3.0 | 5.5 | 3.5 | 2.0 | 1.5 | 0.15 |
5.0 | 4.0 | 5.5 | 4.5 | 2.0 | 1.5 | 0.15 |
8.0 | 8.0 | 8.5 | 8.5 | 3.0 | 2.5 | 0.15 |
RE-FLOW-CONDITION
SPECIFICATION
Property | unit | Value | Test Method | |
---|---|---|---|---|
Resistance | Bulk | Ω | < 0.1 | ESQ-517-02 |
After SMT | Ω | < 0.1 | Measure the resistance between gasket and pattern, after passing reflow | |
After aging test | Ω | < 0.1 | ESQ-517-02 | |
After salt water spray test | Ω | < 0.1 | ||
After Thermal shock test | Ω | < 0.1 | TST: Thermal Shock Test | |
Shielding effectiveness | dB | -70 (Avg.) | MIL DTL-83528C modified | |
compression recovery rate | Before aging | % | > 90 | ESQ-517-26 |
After aging | % | > 90 | ESQ-517-18 | |
Repulsive power | Kgf | < 0.45 | ESQ-517-27 | |
Plating adhesion | Grade | 5 | ESQ-517-16 | |
Flame retardant | UL94V-0 | UL94 test |
REEL TAPE AND PACKING STANDARD
P/N | D [mm] | T [mm] | Q'ty/reel | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A | B | C | D | E | F | G | H | I | J | OD | ID | RW | ||
SMF□□-040025-030 | 4 | 2 | 1.5 | 8 | 12 | 5.5 | 1.75 | 4.3 | 0.3 | 2.8 | 330 | 13 | 12.4 | 2,500EA |
SMF□□-040045-060 | 4 | 2 | 1.5 | 8 | 12 | 5.5 | 1.75 | 6.5 | 0.4 | 4.7 | 330 | 13 | 12.4 | 1,500EA |
SMF□□-040030-040 | 4 | 2 | 1.5 | 8 | 16 | 7.5 | 1.75 | 5.5 | 0.4 | 3.5 | 330 | 13 | 17.5 | 2,500EA |
GROUND FOAM GASKET
FABRIC TYPE
Characteristic
Superior shielding effectiveness & compression set
Specification | |||||||||||||||||||||
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Shielding effectiveness
・Test standard : Advantest [MIL DTL-83528C equivalent]
・Sample size : 10mm(W) x 5mm(T), double sided PSA(T222)
・Surface material : conductive fabric (Polyester + Cu, Ni)
Compression-deflection-resistance test
・Test standard : ESQ-517-27 (referred to various test method)
・Sample : SF100100R-M-NC-A
・Sample size : 10mm(W) x 10mm(T) x 50mm(L)
・Recommended compression : Approx. 30%
Processing into other various shapes and dimension are possible |
Electricity is conducted through the outer conductive layer of the gasket from A to B. Use of conductive PSA increases the electrical contact area between the gasket's outer layer and B at a slight sacrefice of PSA's adhesive strenth and cost over non- conductive PSA. When the width of the gasket is narrow, conductive PSA is required.
Gasket Structure Guidelines
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Please note that above chart is just recommendation, so user make a decision according to application & condition |
the fabric over foam is grounding between inner communication equipment case and I/O connector of PCB
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the fabric over foam is grounding between outer case of cell phone and inner conductive coating