Dow Corning 7920 is a single component, flowable, black, microelectronics adhesive designed with low levels of iconic impurities, low modulus and is suitable for dispensing. This advance material will absorb stress from CTE mismatch for improved reliability and performance. Its primary use is as a die attach adhesive for microelectronic packaging. The product is composed of silica and polydimethylsiloxane.
Dow Corning 7920 Die Attach Adhesive is black in color and will have a viscosity of 20,000 Cp. Time for 20% rise in viscosity at 25°C is less than 24 hours and the Durometer Shore A is 72. Specific gravity of the cured material is 1.2 and unprimed adhesive, lap shear is 1,000 psi (Al). Tensile strength of the innovative product is 500 psi and the elongation is 25%. Dow Corning 7920 not only offers high adhesion, it also has excellent moisture resistance as well as thermal and electrical stability. Dielectric strength is 475 volts/mil and the dielectric constant at 100 Hz is 2.82. The dissipation factor at 100 Hz is 0.0011.
Dow Corning 7920 Typical Properties:
|Dielectric Constant at 100 Hz||2.82|
|Dielectric Strength||475 bolts per mil v/mil|
|Durometer-Shore A||72 Shore A|
|Heat Cure||30 minutes @ 150°C|
|Shear Strength||1,000 psi|
|Tensile Strength||500 psi|
|Volume Resistivity||2.1e+015 ohm-centimeters|
Microelectronics adhesives are primarily designed to meet a key criteria including high purity, moisture resistance, high temperature stability with primeless adhesion to a wide variety of substrates and components. Dow Corning 7920 is well suited for micro-electronic devices requiring low modulus materials, for lead-free solder reflow temperatures (260°C) or other high reliability applications. When applying, all surfaces need to be thoroughly cleaned of any contaminates. This can be done by using a Dow Corning Solvent, naphtha or spirits. Light abrasion is recommended when possible because it will increase the surface area for bonding.
Product safety information for the safe handling of this material can be found on the Dow Corning 7920 MSDS. It has not been tested nor deemed suitable for medical or pharmaceutical uses. When the material arrives, it should be stored at -10 to -25°C. Repeated thawing and freezing should be avoided. Multiple packaging is available for this product. Contact Krayden and a technical representative will assist you with finding the correct size for your application. For more information on the product, view the Dow Corning 7920 TDS.
Dow Corning in an innovative company that manufactures advance silicone solutions for a variety of industries. Dow Corning’s advance engineering and chemists develop these state-of-the-art products with countless hours of research and testing. Dow Corning 7920 is a black, single component, microelectronic material formulated as a die attach adhesive for microelectronic packaging. For more information, contact Krayden, a certified distributor of Dow Corning silicone products.