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LOCTITE ECCOBOND FP4526

Harmonization Code : 3907.30.00.90 | Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms : Epoxide resins : Other

Main features

Low viscosity
Excellent wettability
Hi-Pb and Pb-free applications

Product Description

LOCTITE® ECCOBOND FP4526 epoxy underfill is designed for capillary flow on flip chip applications. It's fast flow, low viscosity and excellent wettability make it ideal for high reliability applications.

Recommended Cure Schedule
15 minutes @ 165°C
(Heat sink or hot plate cure)

Technical Specifications

General Properties

Specific Gravity

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.

1.7

Pot Life

Pot Life
Pot life if the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed.

It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.

36 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 @ -40°C	274 days

Chemical Properties

Extractable Ionic Content, after 20 hours
Chloride (Cl-) Chloride (Cl-) The amount of Chloride (Cl-) ion extracted from the product in parts per million (ppm)	25 ppm
Sodium (Na+) Sodium (Na+) The amount of Sodium (Na+) ion extracted from the product in parts per million (ppm)	10 ppm

Mechanical Properties

Viscosity

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

Viscosity

4,700 MPa.s

Flow rate Flow rate The 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.
25 micron @100°C	30 sec

Thermal Properties

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.

133 °C

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.	33 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.	101 ppm/°C

Additional Information

Pricing & Availability

Pricing for LOCTITE ECCOBOND FP4526
Volume Price Breaks can be seen for each product by clicking on its respective link under the DESCRIPTION column and looking to the volume price break table to the right of the product image. Price per unit is reflected in this table and used during checkout. CAPLINQ lists all its prices without taxes, shipping payment charges or discounts. CAPLINQ has entities in Canada and the Netherlands, and if your shipping address is one of these two countries, applicable taxes will be applied. If your shipping address is to the United States, we request your company?s Employer Identification Number (EIN) or Tax Identification Number (TIN). This is a unique 9-digit number assigned by the IRS and is required for all cross-border shipments. Failure to provide this number could result in delays to your order. If your shipping address is within the EU, but outside the Netherlands, then we are required to request your company's Value Added Tax (VAT, BTW, MwSt) number to be able to ship the goods tax-free. For all other countries, no taxes are levied on your orders. DON'T LIKE THESE PRICES? Tell us what you will pay for what order quantity. Shipping Charges for LOCTITE ECCOBOND FP4526 All prices shown are ex-works CAPLINQ, but during the checkout process, you will be given several shipping options including Canada Post, TNT, UPS or the choice of using your own freight forwarder. Depending on your shipping address, the shipping charges will be calculated as follows: Europe, Middle East, Asia and Africa: Shipping from CAPLINQ Netherlands (Amsterdam) Canada, USA, Mexico and South America: Shipping from CAPLINQ Canada (Ottawa) Payment option for LOCTITE ECCOBOND FP4526 During the checkout process, you will be presented with several payment options including: Credit Card (We accept VISA and Mastercard) Bank Transfer (You will be given the payment instructions at the time of order placement) PayPal (Where you can also pay with American Express Cards) Purchase Order (You must be preapproved first. See our Online Credit Application) Availability for LOCTITE ECCOBOND FP4526 To the right of the product is a small icon that lets you know the availability and leadtime of the product. This leadtime is the time to ship the product and delivery times vary based on the method of delivery you select at the time you place your order. Contact us if anything is unclear or you need more assistance.

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