22
ENGINEERING YOUR SUCCESS.
Description
THERMATTACH
®
double-sided
thermal interface tapes provide
exceptional bonding properties
between electronic components and
heat sinks, eliminating the need for
mechanical fasteners.
THERMATTACH
®
tapes are proven
to offer excellent reliability when
exposed to thermal, mechanical,
and environmental conditioning.
They are offered in a variety of
configurations, as detailed in the
typical properties table.
Features / Benefits
• Offered in various forms to
provide thermal, dielectric, and
flame retardant properties
• Offered in custom die-cut
configurations to suit a variety of
applications
• Eliminates the need for
mechanical attachment (i.e.
screws, clips, rivets, fasteners)
• Proven reliability under various
mechanical, thermal, and
environmental stresses
• Embossed version available
• UL recognized V-0 flammability
• Meets RoHS specifications
• No curing required, unlike epoxy
or acrylic preforms or liquid
systems
• Easily reworkable
Typical Applications
• Mount heat sinks to components
dissipating < ~25 W
• Attach heat sinks to PC (esp.
graphics) processors
• Heat sink attachment to motor
control processors
• Telecommunication
infrastructure components
Product Attributes
T418
• Superior adhesive strength
• Best conformability to
components
• UL94 V-0 rated
• Good thermal performance
T412
• Good adhesion
• Superior thermal performance
• General use tape with added
thermal conductivity of Al foil
layer
T411
• Designed for adhesion to plastic
packages
• Attaches to low surface energy
packages
• UL94 V-0 rated
T404/T414
• Excellent dielectric strength due
to polyimide carrier
• Good thermal performance
• UL94 V-0 rated
T405
• General use tape with added
thermal conductivity of Al foil
layer
• Excellent thermal performance
• UL94 V-0 rated
THERMATTACH
®
Double-Sided Thermal Tapes
Thermally Conductive Attachment Tapes
Chomerics
23
Thermally Conductive Attachment Tapes
Typical Properties T418 T412 T404 / T414 T405 / T405-R T411 Method
Physical
Recommended for Plastic
Component Attachment
No No No No Yes --
Color Light Yellow Gray Beige White Clear / Metallic --
Embossed Optional Standard Standard Standard No --
Reinforcement Carrier Fiberglass Aluminum Mesh Filled Polyimide Aluminum Aluminum Mesh Visual
Thickness, inch (mm) 0.010 (0.25) 0.009 (0.23) 0.005 (0.127) 0.006 (0.15) 0.010 (0.25) ASTM D374
Thickness Tolerance, inch (mm)
± 0.001
(0.025)
± 0.001
(0.025)
± 0.001
(0.025)
± 0.001
(0.025)
± 0.001
(0.025)
--
Adhesive CTE, ppm/ºF 300 300 300 300 400 ASTM D3386
Glass Transition Temperature
Range ºF (ºC)
-4 (-20) -22 (-30) -22 (-30) -22 (-30) -58 (-50) ASTM D1356
Operating Temperature
Range, ºF (ºC)
-22 to +257
(-30 to + 125)
-22 to +257
(-30 to + 125)
-22 to +257
(-30 to + 125)
-22 to +257
(-30 to + 125)
-58 to +302
(-50 to +150)
--
Thermal
Thermal Impedance
°C-in
2
/ W (°C-cm
2
/W) @ 300psi
1.2 (7.7) 0.30 (2.0) 0.6 (3.7) 0.5 (3.4) 1.0 (6.5) ASTM D5470
Thermal Conductivity W/m-K 0.5 1.4 0.4 0.5 0.5 ASTM D5470
Electrical
Voltage Breakdown (kVac) 5 N/A 5 N/A NA ASTM D149
Volume Resistivity, (ohm-cm) 1.0 X 10
13
1.0 X 10
2
3.0 X 10
14
N/A NA ASTM D257
Mechanical / Adhesion
Lap Shear Al-Al @25°C, psi (kPa) 150 (1,034) 70 (480) 100 (689) 100 (689) 40 (270) ASTM D1002
90° Peel Adhesion to 0.002”
aluminum foil, lbf /in (N/cm)
4.0 (6.9) 1.0 (1.76) 1.5 (2.6) 1.5 (2.6) 2.0 (3.5) ASTM D1000
Die Shear Adhesion after
400 psi attachment, psi (kPa)
– 2 hour sample dwell time 77ºF (25ºC)
150 (1,034) 135 (931) 130 (897) 125 (862) 110 (759)
Chomerics
# 54
Creep Adhesion, days
77ºF (15ºC)
302ºF (125ºC)
>50
>10
>50
>10
>50
>10
>50
>10
>50
>10
PSTC-7
Regulatory
Flammability Rating (See UL File E140244) V-0 Not Tested V-0 V-0 V-0 UL94
RoHS Compliant Yes Yes Yes Yes Yes
Chomerics
Certification
Shelf-Life, months from shipment 12 12 12 12 12 Chomerics
Outgassing, % TML (% CVCM) Not Tested 0.14 (0.00) 0.56 (0.02) 0.25 (0.01) Not Tested ASTM E595
THERMATTACH
®
Thermally Conductive Attachment Tapes