Chomerics
23
Thermal Tapes
THERMATTACH
®
Tape
Thermally Conductive Attachment Tapes
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
Eliminate the need for •
mechanical attachment (i.e.
screws, clips, rivets, fasteners)
Proven reliability under various •
mechanical, thermal, and
enviromental 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
T404
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•
T405-R
T405 without halogenated flame •
retardant
T413
Excellent thermal performance•
Fiberglass layer provides added •
strength
T414
T404 without halogenated flame •
retardant
Chomerics
24
Thermally Conductive Attachment Tapes
Typical Properties T418 T412 T404 / T414 T405 / T405-R T411 T413 Method
Physical
Recommended for Plastic
Component Attachment
No No No No Yes No --
Color Light Yellow Gray Beige White Clear / Metallic White --
Embossed Optional Standard Standard Standard No Standard --
Reinforcement Carrier Fiberglass Aluminum Mesh Filled Polyimide Aluminum Aluminum Mesh Fiberglass Visual
Thickness, mm (inch) 0.25 (0.010) 0.23 (0.009) 0.127 (0.005) 0.15 (0.006) 0.25 (0.010) 0.18 (0.007) ASTM D374
Thickness Tolerance, mm (inch)
± 0.025
(0.001)
± 0.025
(0.001)
± 0.025
(0.001)
± 0.025
(0.001)
± 0.025
(0.001)
± 0.025
(0.001)
--
Adhesive CTE, ppm/ºC (ppm/ºF) 300 300 300 300 400 300 ASTM D3386
Glass Transition Temperature
Range ºC (ºF)
-20 (-4) -30 (-22) -30 (-22) -30 (-22) -50 (-58) -30 (-22) ASTM D1356
Operating Temperature
Range, ºC (ºF)
-30 to + 125
(-22 to +257)
-30 to + 125
(-22 to +257)
-30 to + 125
(-22 to +257)
-30 to + 125
(-22 to +257)
-50 to +150
(-58 to +302)
-30 to + 125
(-22 to +257)
--
Thermal
Thermal Impedance
°C-cm
2
/W (°C-in
2
/ W)
7.7 (1.2) 2.0 (0.30) 3.7 (0.6) 3.4 (0.5) 6.5 (1.0) 4.0 (0.65) ASTM D5470
Thermal Conductivity W/m-K 0.5 1.4 0.4 0.5 0.5 0.4 ASTM D5470
Electrical
Voltage Breakdown (Vac) 5,000 N/A 5,000 N/A NA 3,700 ASTM D149
Volume Resistivity, (ohm-cm) 1.0 X 10
13
1.0 X 10
2
3.0 X 10
14
N/A NA 1.3 X 10
16
ASTM D257
Mechanical / Adhesion
Lap Shear Al-Al @25°C, kPa (psi) 1,034 (150) 480 (70) 689 (100) 689 (100) 270 (40) 689 (100) ASTM D1002
90° Peel Adhesion to 0.002”
aluminum foil, N/cm (lbf /in)
6.9 (4.0) 1.76 (1.0) 2.6 (1.5) 2.6 (1.5) 3.5 (2.0) 2.6 (1.5) ASTM D1000
Die Shear Adhesion after
400 psi attachment, kPa (psi)
– 2 hour sample dwell time 25ºC (77ºF)
1,034 (150) 931 (135) 897 (130) 862 (125) 759 (110) 931 (135)
Chomerics
# 54
Creep Adhesion, days
15ºC (77ºF)
125ºC (302ºF)
>50
>10
>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 Not Tested Not Tested UL94
RoHS Compliant Yes Yes Yes Yes Yes Yes
Chomerics
Certification
Shelf-Life, months from shipment 12 12 12 12 12 12 Chomerics
THERMATTACH
®
Thermally Conductive Attachment Tapes