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North America• 77 Dragon Court, Woburn, MA 01888-4014 TEL +(1) 781-935-4850 FAX +(1) 781-933-4318
Europe• Marlow, Bucks, UK TEL +(44) 1628 404000 FAX +(44) 1628 404090
Asia Pacific • Hong Kong TEL +(852) 2 428 8008 FAX +(852) 2 423 8253
South America• São Paulo, Brazil TEL +(55) 11 3917 1099 FAX +(55) 11 3917 0817
www.chomerics.com
Leader in EMI Shielding and Thermal Management
THERMATTACH® T418
Chomerics THERMATTACH
®
T418
Extremely High Strength Heat Sink & Component Attachment Tape
Typical T418 Material Properties
Product Description – T418 is the latest offering in Chomerics’ line of industry-leading thermally conductive
attachment tapes. Chomerics has utilized its world-class materials science expertise and decades of applications
development experience to create this superior product, offering exceptional thermal and mechanical attachment
properties.
Data contained in this data sheet represents typical properties and is not meant for specification purposes. It is the sole
responsibility of the customer (user) to appropriately evaluate this product for use. Please contact Chomerics for official
specifications for this product and for applications assistance.
Properties Metric Value Imperial Value Method
Composition
Ceramic-filled acrylic PSA
with fiberglass carrier
Ceramic-filled acrylic PSA
with fiberglass carrier
Visual
Thickness (mm) / (inch) 0.25 +/- 0.025 0.010 +/- 0.001 ASTM D374
Thermal Impedance (K-cm
2
/W) / (K-in
2
/ W)
Tested @ 50 psi
9.0 1.4 ASTM D5470
Thermal Conductivit y (W/m-K) 0.5 0.5 ASTM D5470
Voltage Breakdown (Vac) 5,000 5,000 ASTM D149
Dielectric Strength (Vac/mm) / (Vac/mil) 15.2 600 ASTM D149
Volume Resistivity (Ohm-cm) 1.0 X 10
13
1.0 X 10
13
ASTM D257
2 mil Al Foil Peel Strength (N/cm) / (lbf/in)
90º on aluminum
90° on plastic (G10)
8.1
8.2
4.6
4.7
ASTM D1000
Lap Shear (KPa) / (psi)
10 psi & 15 second attach, Al - Al. Peel dwell time <10 min.
862 125 ASTM D1002
Die Shear Adhesion after 400 psi attachment (KPa) / (psi) – 2
hour sample dwell time
1,669 242 Chomerics # 54
Contact Area (%) (Acrylic glass to Al, 10 psi attach for 15
seconds)
30+ % 30+ % Chomerics
Continuous Operating Temperature ºC (ºF) -40 to + 125 -40 to + 257 Supplier Certification
Shelf-Life months (from Chomerics date of shipment) 12 12
Flammability Rating UL94 V0 UL94 V0
UL94V0 against 0.062”
Aluminum
RoHS Information Compliant Compliant
RoHS Specification. SGS
Testing
THERMATTACH T418
North America• 77 Dragon Court, Woburn, MA 01888-4014 TEL +(1) 781-935-4850 FAX +(1) 781-933-4318
Europe• Marlow, Bucks, UK TEL +(44) 1628 404000 FAX +(44) 1628 404090
Asia Pacific • Hong Kong TEL +(852) 2 428 8008 FAX +(852) 2 423 8253
South America• São Paulo, Brazil TEL +(55) 11 3917 1099 FAX +(55) 11 3917 0817
www.chomerics.com
Reliability Testing
T418 has been tested after exposing to thermal aging (1000 hours at temperatures up to 125°C), Humi dity
aging (1000 hrs at 85°C/85% relative humidity), T hermal shock (-40 to 125 °C, 10°C/min. for 100 cycles),
Mechanical shock (60G’s in 6 directions with half sine pulse), and Sine vibration (X&Y axis, 10-2000Hz with
2 grams to 12 grams). Lap shear samples were prepared by sandwiching T418 tape between Al substrates
with 1x1 inch² overlap. Thermal samples for reliability testing were also pr epared by laminating the tape
between Al substrates at various pressures. It exhibits excellent stability, and passes thermal and
mechanical properties after aging.
Lap Shear Strength After Thermal Aging
0
50
100
150
200
250
300
350
400
Initial 1 week 6 weeks Initial 1 week 6 weeks Initial 1 week 6 weeks
10 psi 10 sec. 25 psi 10 sec. 100 psi 10 sec.
Aging Time at Temperarure for Various Lamination Conditions
Lap Shear Strength (psi)
85°C
100°C
125°C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Initial 1 week 6 weeks Initial 1 week 6 weeks Initial 1 week 6 weeks
10 psi 10 sec. 25 psi 10 sec. 100 psi 10 sec.
Aging Time at Temperature for Various Lamination Conditions
Thermal Impedance (°C inch²/W)
85°C
100°C
125°C
Thermal Impedance After Thermal Aging