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LOCTITE® ABLESTIK QMI519 – Conductive Die-Attach Adhesive – Bonding ICs to metal substrates in electronics manufacturing

  • Item Name: LOCTITE ABLESTIK QMI519
  • Manufacturer: Henkel
  • Product Category: Electrically and Thermally Conductive Adhesive
  • Technologies: BMI Acrylate, Silver-Filled Conductive Adhesive
  • Applications: Die Attach for SOIC, SOP, QFP, and QFN Packages, Bonding ICs to Metal Leadframes
  • Color: Silver
  • Cure Type: Heat Cure
  • Package Size: Contact Techniq VN for details.
  • Shelf Life: 1 year (12 months) at -40°C

1. Product Overview

LOCTITE ABLESTIK QMI519 is a silver-filled, electrically & thermally conductive adhesive designed for die attach applications. It features:

  • One-component formulation
  • High thermal stability and resistance to delamination
  • Void-free bondline with hydrophobic properties
  • Fast heat cure process
  • Compatible with Copper, Silver, Palladium, Alloy 42, and ceramic surfaces
  • Used in SOIC, SOP, QFP, and QFN packages

2. Applications

  • Bonding integrated circuits and components to metal leadframes
  • Optimized for high-volume production with in-line curing
  • Enhanced coplanarity when cured on the die bonder

3. Typical Properties

Properties Values
Uncured Properties
Viscosity @ 25°C 9,000 mPa∙s (cP)
Thixotropic Index 4.2
Specific Gravity 3.8
Pot Life @ 25°C 48 hours
Shelf Life @ -40°C 1 year
Curing Performance
SkipCure Process ≥10 sec @ 200°C
Alternative Cure 1 15 min @ 185°C
Alternative Cure 2 15 min @ 200-220°C
Cured Properties
Coefficient of Thermal Expansion (CTE) α1 40 ppm/°C
CTE α2 140 ppm/°C
Glass Transition Temperature (Tg) 75°C
Young’s Modulus 5,300 N/mm² (769,000 psi)
Thermal Conductivity 3.8 W/m-K
Electrical Properties
Volume Resistivity 0.0001 ohm-cm
Die Shear Strength
Ag-plated Cu (300×300 mil, 1 mil bondline) @ 25°C 10 N/mm² (1,450 psi)

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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