Cookson Group POLYSOLDER® LS One Part Electrically Conductive Adhesive Paste

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Cookson Group POLYSOLDER® LS One Part Electrically Conductive Adhesive Paste (discontinued **)
Categories:	Polymer; Adhesive; Thermoset
Material Notes:	This material is a lead-free, self-fluxing, no clean, environmentally acceptable solder substitute. It is specifically designed for electronic component assembly, especially surface mount. This product can be applied by either pneumatic dispensing or screen print methods, it is then hardened by thermal processing in IR, convection, conduction or vapor phase equipment. This material is a unique electronic polymer that forms stable electrical and mechanical junctions with standard components, even after extended environmental aging. Features: Pb-Free Intrinsically Clean Fine Pitch Low Stress Stable Junctions Self Fluxing Information provided by Cookson Electronics
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Physical Properties	Original Value	Comments

Filler Content	74 - 78 %
Brookfield Viscosity	250000 - 350000 cP @Temperature 25.0 °C	Brookfield #52 spindle, 1 rpm

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	4500 - 5100 psi
Elongation at Break	0.54 - 0.66 %
Tensile Modulus	810000 - 850000 psi
Adhesive Bond Strength	14.2 MPa	Die shear, Si die on gold pad
	6700 psi	Die shear, gold cover on gold plated ceramic substrate

Electrical Properties	Original Value	Comments
Volume Resistivity	<= 0.0014 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	57.0 µm/m-°C @Temperature 20.0 °C	Alpha 1
Thermal Conductivity	3.50 W/m-K
Glass Transition Temp, Tg	90.0 °C

Processing Properties	Original Value	Comments
Pot Life	480 - 600 min	On screen
Shelf Life	6.00 Month @Temperature -40.0 °C

Descriptive Properties
300C Dry/Cured	0.0181
300C Wet/Non-Cured	0.026
Bonding Range	140-170°C
Junction Resistivity	<25 mohm
Peak Load	18.6-21.4 lbs
Push Off Strength	13-15 lbs	1206 chip resistor
	35-40 lbs	68PLCC quad pack, 50 mil pitch
Thixotropic Index	4.5-5.0

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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