Metaduct 1240 Conductive Die Attach Epoxy


METADUCT 1240 imparts a new dimension to “one-component” electrically conductive technology. Flexibility, coupled with superior electrical performance and ease of handling provide the outstanding characteristics described below:

● Exceptionally high conductivity (0.0001 ohm-cm) yet flexible
● Flexes and “folds over” full 180° without cracking or tearing!
● Screen printable
● Resists heat aging and modulus change
● Sprayable for EMI/RFI shielding coatings and ground planes
● Superior adhesion to Kapton
● Produces fully flexible circuit lines on flexible substrates and FR-4
● No mixing required – “one-component” use “As Is” to “silk screen” with no bleed!
● Compatible with wave soldering and solder reflow operations
● Continuous operations at 150°C with virtually no change

METADUCT 1240 provides a flexible elastomeric die-attach bonder which insulates sensitive devices from mechanical and thermal shock in cyclic operations. METADUCT 1240 also functions as an excellent “solder substitute” in flexible circuitry bonding and staking LED’s, other devices and SMD components to circuit lines. METADUCT 1240 also screens to provide shielding ground planes on flexible and rigid circuit substrates.

METADUCT 1240 bonds tenaciously to “difficult to bond” surfaces such as polysulfone, Kapton and polyimide, and has superior adhesion to most common materials including glass, ceramics, metals and FR-4 laminate board as well as all bondable plastics including treated Rulon, Teflon and polyethylene.


A. Preparation
(1) Prepare all surfaces as required for bonding with adhesives.*
(2) Mix METADUCT 1240 well in its container before removing the desired amount.
(3) Select appropriate application instruction procedure, and cure schedule, as described below
*Refer to applicable Technical Service Bulletin 3-640 for specific substrate preparationprocedure.

B. For use as a solder, micro-dot adhesive or die attach bonder
Apply METADUCT 1240 with a spatula, syringe, dental amalgam dispenser
for any other convenient mechanical device. METADUCT 1240 stays exactly
where it is placed and adheres aggressively to form flexible tenancious con-
ductive bonds. Cure as directed below.

C. For use as a coating
Mix METADUCT 1240 with Toluol to desired consistency. Apply by any
suitable method: spray, roller, brush, screen. Allow solvent to dry at room
temperature or force dry before curing. METADUCT 1240 is designed to
provide a well defined, smooth, uniform clean image through a 235 mesh
screen when thinned with approximately 5% Toluol. To assure uniformity
of thinned mixture after storage, remix before using. Cure as directed below.

D. Cure schedule
Typical cure schedules are:*
● 15 to 30 minutes at 150°C, or
● 40 to 70 minutes at 125°C
Cure schedules can be varied to suit time and temperature of application
*Thinned mixtures may require predrying cycles.


Linear Shrinkage 0.005
Hardness Shore, D-ASTM 45
Specific Gravity, 25°C/25°C 2.4
Viscosity, 103 cps400 to 500
Shelf stability [@ average room temperature 60° to 72°F] 3 months**

**Shelf life can be extended by storage at temperatures below 40°F

Thermal Conductivity K-Factor cal/sec/cm2cº/cm: 100
Operating Range, ºC: -55 to 175

Volume Resistivity, ASTM D-1002, ohm-cm:  0.0001

For additional information contact your PROTAVIC Sales Representative or our Technical Service Department.

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Technical information and recommendations made by Protavic America, Inc. concerning products and uses or applications thereof, are based on reliable laboratory tests and are believed to be accurate. No warranty, however, is expressed or implied, nor is any warranty expressed or implied as to results to be obtained from use of said materials, whether used singly or in combination with other products. No statements made are to be construed as constituting a license under any existing patent.