PERMABOND UV683

Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide

PERMABOND UV683

Main features

  • Controlled Doming and Encapsulation
  • Rapid Tack-Free UV Cure
  • High-Transmittance Cured Coating

Product Description

Permabond UV683 is a colorless UV-curable acrylate coating and doming compound for smart-card microchips and electronic-component encapsulation. Its 1,000 to 1,600 mPa s viscosity at 25 deg C supports doming application, while cure across 320 to 420 nm produces a tack-free surface. Typical tack-free time ranges from 1 to 15 seconds under the listed lamp conditions. The cured coating provides more than 98% light transmittance, 12 to 14 N/mm^2 tensile strength, more than 50% elongation, and 50 to 65 Shore D hardness for optically clear protective applications.

Key features

  • Doming-Grade Viscosity: Viscosity is 1,000 to 1,600 mPa s at 25 deg C.
  • Rapid Tack-Free Cure: Typical tack-free time is 1 to 15 seconds under the listed lamp conditions.
  • High-Transmittance Coating: The cured coating provides more than 98% light transmittance.

Applications

Applications include coating and doming, smart-card microchip coating, and encapsulation of electronic components.

Product Family

PERMABOND UV683

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Colorless
Refractive index
The refractive index determines how much the path of light is bent, or refracted, when entering a material. It is calculated by taking into account the velocity of light in vacuum compared to the velocity of light in the material. The refractive index calculation can be affected by the wavelength of light and the temperature of the material. Even though it is usually reported on standard wavelengths it is advised to check the TDS for the precise test parameters.
>1.490
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.1
Physical Properties
Viscosity
Viscosity 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
1,000-1,600 mPa.s
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
>50 %
Chemical Properties
Water Absorption
<2 %
Other Properties
Storage Temperature
2 - 7 °C
Thermal Properties
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding. The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
55 °C

Additional Information

Technical properties

As-supplied / before-processing properties

Fixture time depends on lamp output, distance, and substrate transmission.

Property Value Unit Method / condition
Chemical compositionAcrylateAs supplied
AppearanceColorlessAs supplied
Viscosity1,000 to 1,600mPa sAt 25 deg C
Specific gravity1.1As supplied
Typical fixture time1 to 7secondsListed UV lamp conditions
Typical tack-free time1 to 15secondsListed UV lamp conditions
Cure wavelength320 to 420nmMatch lamp output to the photoinitiator
Technical properties

After-processing / final-state properties

Values are typical cured properties for the stated methods and substrates.

Property Value Unit Method / condition
Tensile strength12 to 14N/mm^2ISO 37
Light transmittance>98%Cured coating
Refractive index>1.490Cured coating
Elongation at break>50%ISO 37
Hardness50 to 65Shore DISO 868
Water absorption<2%ISO 62; 2 hours in boiling water
Glass transition temperature55deg CDSC; 20 deg C/min rate

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