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Glossary of Product Properties and Test Parameters

This glossary contains descriptions of key material properties, so that the user can better understand the products capabilities and limitations.

It is important to note that not all products are necessarily tested agains the same conditons, as they are not all necessarily relevant to either the product or the application

Group NameDescription
Application Example
Application MethodChecking one of these application methods will filter by products that can be used for this application
Coefficient of Thermal Expansion (CTE)CTE (Coefficient of thermal expansion) is a material property that is indicative of the extent to which a material expands with a change in temperature. This can be a change in length, area or volume, depending on the material. Knowing the CTE of the layers is helpful in analyzing stresses that might occur when a system consists of an adhesive plus some other solid component.
Competitive Brand Names
Competitive Companies
Competitive Cross ReferenceThis products is equivalent to the competitive products listed. These are cross references to competitors' equivalent products.
Curing Schedule
Curing Time
Die Shear StrengthDie Shear Strength is the force that has to be applied to the side of the semiconductor die before it shears from its mounting. Shear strength is measured for various die sizes, substrates and operating temperatures so check the Technical data sheet for your intended usage.
Dielectric ConstantDielectric Constant (k) is a number relating the ability of a material to carry alternating current to the ability of vacuum to carry alternating current.
Dissipation Factor
Extractable Ionic Content, after 20 hours
FlashMold Flash, as measured in millimeters in diverse thickness channels
Flexural Modulus
Flexural Strength
Flow rateThe time it takes for the underfill to travel through a gap and onto a glass surface. Most results are for 1cm distance but always check the TDS for additional information.
Gel Time
Glass Plate Flow
HardnessHardness is a dimensionless quantity. There is no direct relationship between measurements in one scale and their equivalent in another scale or another hardness test.
Heat Sealable
Main ApplicationTags to filter products belonging to main application
Main CategoryTags to filter products belonging to main categories
Melting Temperature
Metal Loading
Metallic Impurity
Moisture AbsorptionMoisture absorption shows the capacity of a polymer to absorb moisture from its environment. Absorbed moisture can reduce the glass transition temperature and strength of a polymer and can also result in popcorning, unreliable adhesion or voids in the bond line due to moisture desorption or entrapment. Moisture absorption should always be mentioned with the test conditions to provide a meaningful frame of reference.
Particle Size
Post Mold Cure
Shelf Life
Spiral Flow
Storage (DMA) Modulus
Sub ApplicationProducts that fall under the main application
SubcategoryProducts that fall under the main category
Tensile ModulusTensile modulus is a mechanical property that measures the stiffness of a solid material. It is the slope of stress strain curve of a specific material under direct tensile loading. Tensile modulus can be used to predict the elongation or compression of an object as long as the stress is less than the tensile strength of the material.
Tensile StrengthThe tensile strength of a material is the maximum amount of tensile stress that it can withstand while being stretched or pulled before failure. Some materials break very sharply, without plastic deformation, in what is called a brittle failure. Others, which are more ductile, including most metals, experience some plastic deformation and possibly necking before fracture.
UL94 Rating
ViscosityViscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
Water Extract Data, 20hrs water boilWater Extract Data, 20hrs water boil
Weight Loss