Harmonization Code : 7115.90.00.00 |   Other articles of precious metal or of metal clad with precious metal : Other
Main features
  • Electrically conductive
  • Thermally conductive

Product Description

LOCTITE ABLESTIK CDF 515P,  highly filled, conductive die attach adhesive is designed to provide high thermal and electrical conductivity in the attachment of integrated circuits and components onto metal leadframes. This adhesive exhibits strong adhesion to various wafer metallizations and leadframe finishes. It can be used in a variety of die sizes ranging from 3mm x 3mm to 8mm x 8mm .

LOCTITE ABLESTIK CDF 515P offers high MSL reliability, controlled fillet size and does not exhibit resin bleed out. It has good wetting and low warpage on large dies and is recommended for thin wafer handling applications. It comes in 15 and 30um and is typically used for QFN, TQFP and eTQFP package applications.

Cure Schedule

  • 30 minute ramp from 25°C to 200°C, hold 60 minutes @ 200°C
  • 30 minute ramp from 25°C to 175°C, hold 60 minutes @ 175°C
Product Family
8 inch circles

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.

Technical Specifications

General Properties
Film Thickness
Film Thickness
Film thickness is the thickness of a backing film without taking into account any coatings or adhesive layers. It is measured in micron and the conversion factor to mil is 0.039.
15 µm
Work life @25°C
Work life @25°C
Work life is the amount of time we have to work with a material until it is no longer able to be easily worked and applied on a substrate.

It is based on the change in viscosity and it can rely on the application requirements.
2160 hours
Shelf Life
Shelf Life
Shelf life is the amount of time after manufacturing that a product is guaranteed to retain its properties.

It differs vastly per product and it is based on temperature and storage conditions.

The properties can be guaranteed for the temperature and time range indicated on the TDS since those are the ones tested to be the best for the product.
Shelf Life @ 5°C 365 days
Electrical Properties
Volume Resistivity
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
4.0x10-4 Ohms⋅cm
Thermal Properties
Coefficient of Thermal Expansion (CTE)
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.
Coefficient of Thermal Expansion (CTE), α1
Coefficient of Thermal Expansion (CTE), α1
CTE α1 (alpha 1) is the slope of the Coefficient of thermal expansion in a temperature range below the Glass transition temperature (Tg).

It explains how much a material will expand until it reaches Tg.
75 ppm/°C
Coefficient of Thermal Expansion (CTE), α2
Coefficient of Thermal Expansion (CTE), α2
CTE α2 (alpha 2) is the slope of the Coefficient of thermal expansion in a temperature range above the Glass transition temperature (Tg).

It explains the extent to which a material will expand after it passes Tg.
274 ppm/°C
Glass Transition Temperature (Tg)
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.
5 °C
Thermal Conductivity
Thermal Conductivity
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance.

Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
1.8 W/m.K

Additional Information

Films work like the “household double sided tape”. We can quickly appreciate the benefit as we used a dry resin for this, that results in a no mess assembly and very even BLT. Standard thickness of our films is 15um and 30um.

If your Z-space is really critical and has to have a very low BLT, Film is the way to go. Yes, there will be the additional process of laminating the film underneath you wafers but after that its all the same as traditional die attach process.



CDF 500P - Die attach film property comparison