All statements, technical information and recommendations herein are based on tests we believe to be reliable, and
THE FOLLOWING IS MADE IN LIEU OF ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING THE IMPLIED
WARRANTIES OF MARKETABILITY AND FITNESS FOR PURPOSE. Sellers’ and manufacturers’ only obligation shall be to
replace such quantity of the product proved to be defective. Before using, user shall determine the suitability of the product
for its intended use, and the user assumes all risks and liability whatsoever in connection therewith. NEITHER SELLER NOR
MANUFACTURER SHALL BE LIABLE EITHER IN TORT OR IN CONTRACT FOR ANY LOSS OR DAMAGE, DIRECT,
INCIDENTAL, OR CONSEQUENTIAL, INCLUDING LOSS OF PROFITS OR REVENUE ARISING OUT OF THE USE OR
THE INABILITY TO USE A PRODUCT. No statement, purchase order or recommendations by seller or purchaser not
contained herein shall have any force or effect unless in an agreement signed by the officers of the seller and manufacturer.
PDS_GP_Ultimate_0410
Gap Pad
®
VO Ultimate
Ultra Conformability, Robust, Improved Thermal Conductivity, Gap Filling Material
Gap Pad®: U.S. Patent 5,679,457 and others
Features and Benefits
• Thermal conductivity: 1.3 W/m-K
• Ultra conformability
• Gel-like modulus
• Excellent rebound
• Decreased strain
• Remarkable handling
• Electrically isolating
Gap Pad®VO Ultimate is a robust, highly
compliant product that is ideal for both small
and large gap designs.The fiberglass carrier on
one side of the material allows ease of
rework, excellent handling characteristics and
puncture resistance. Additionally the fiberglass
carrier has a slight inherent tack, minimizing
any shifting during assembly.
The conformable and elastic nature of Gap Pad®
VO Ultimate allows excellent interfacing and wet-
out characteristics, even to surfaces with a high
degree of roughness or uneven topography.
The construction of Gap Pad®VO Ultimate;
one side has high inherent tack, while the
other side has minimal tack.This combination
is useful for manual and automated processes.
Note: Resultant thickness is defined as the final gap
thickness of the application.
Typical Applications:
• Various IC packages
• Thermally enhanced BGA packages
• Between any heat-generating
semiconductor and a heat sink
• Computers and peripherals
Configurations Available:
• Sheet form and die-cut parts
GPVOU
0.020", 0.040", 0.060"
01 0816
0.020
0.61 1.21 1.82 2.42 3.03 3.79
140
120
100
80
60
40
20
0
Thickness vs. Thermal Resistance
Gap Pad VO Ultimate
Thermal Resistance
(
C-in2/W
)
Resultant Thickness (mils)
TYPICAL PROPERTIES OF GAP PAD VO ULTIMATE
PROPERTY IMPERIAL VALUE METRIC VALUE TEST METHOD
Color Gray/Black Gray/Black Visual
Reinforcement Carrier Fiberglass Fiberglass —
Thickness (inch) / (mm) 0.020 to 0.125 0.508 to 3.175 ASTM D374
Inherent Surface Tack (1 side) 1 1 —
Density (Bulk Rubber) (g/cc) 1.8 1.8 ASTM D792
Heat Capacity (J/g-K) 1.0 1.0 ASTM E1269
Hardness (Bulk Rubber) (Shore 00) (1) 30 30 ASTM D2240
Young's Modulus (psi) / (kPa) (2) 13 90 ASTM D575
Continuous Use Temp (°F) / (°C) -76 to 392 -60 to 200 —
ELECTRICAL
Dielectric Breakdown Voltage (Vac) 6000 6000 ASTM D149
Dielectric Constant (1 Mhz) 5.0 5.0 ASTM D150
Volume Resistivity (Ohm-meter) 109109ASTM D257
Flame Rating V-0 V- 0 U.L. 94
THERMAL
Thermal Conductivity (W/m-K) 1.3 1.3 ASTM D5470
THERMAL PERFORMANCE vs. STRAIN
Deflection (% strain) 10 20 30
Thermal Impedance (°C-in2/W) 0.040" (3) 1.60 1.55 1.46
Thermal Impedance (°C-cm2/W) 1.016mm (3) 10.3 10.0 9.4
1) Thirty second delay value Shore 00 hardness scale. 2)Young’s Modulus, calculated using 0.01 in/min. step rate of strain
with a sample size of 0.79 inch2. 3) The ASTM D5470 test fixture was used. The recorded value includes interfacial ther-
mal resistance. These values are provided for reference only. Actual application performance is directly related to the
surface roughness, flatness and pressure applied.
• Telecommunications
• Power conversion
• Automotive
• LED lighting packages
www.bergquistcompany.com
The Bergquist Company -
North American Headquarters
18930 West 78th Street
Chanhassen, MN 55317
Phone: 800-347-4572
Fax: 952-835-0430
The Bergquist Company -
European Headquarters
Netherlands
Phone: 31-35-5380684
Fax: 31-35-5380295
The Bergquist Company -
Asia Headquarters
Hong Kong
Phone: 852-2690-9296
Fax: 852-2690-2344
