Applications

LOCTITE ABLESTIK ICP 3920

  • Item Name: LOCTITE ABLESTIK ICP 3920
  • Manufacturer: Henkel
  • Product Category: Electrically Conductive Epoxy Adhesive
  • Technologies: Epoxy, Electrically Conductive, Thermosetting
  • Applications: Fine dispensing, stencil/screen printing, SMT assembly
  • Color: Silver
  • Cure Type: Heat cure (5 min @ 150°C)
  • Package Size: Contact Avantek for details
  • Shelf Life: 6 months

1. Product Overview

LOCTITE ABLESTIK ICP 3920 is a one-component, electrically conductive epoxy adhesive. It is designed for fine dispense or printing applications in SMT assembly. The formulation features low viscosity, low CTE, improved dispensability, and long work life, making it a Pb-free alternative to solder. The adhesive cures at low temperatures with no post-cure required.

2. Applications

  • Fine dispense or printing applications
  • SMT (Surface-Mount Technology) assembly
  • Stencil or screen printing processes

3. Typical Properties

Uncured Properties
Property Value
Technology Epoxy
Appearance Silver
Viscosity (5 rpm, Cone & Plate) 26,100 mPa·s (cP)
Thixotropic Index (25°C) 5.7
Shelf Life (@ -40°C) 6 months
Curing Performance
Cure Schedule Condition
Batch Cure 5 min @ 150°C
Cured Properties
Property Value
Glass Transition Temperature (Tg) 119°C
Coefficient of Thermal Expansion (CTE) 29 ppm/°C (Below Tg), 130 ppm/°C (Above Tg)
Volume Resistivity (25°C) 0.0003 Ω·cm
Extractable Ionic Content (ppm) Cl-: 5.1, Na+: 0.6, K+: 0.2
Mechanical Properties (Die Shear Strength on Ag-Plated Leadframe)
Condition Strength
@ 25°C 36.5 N/mm² (5,290 psi)
@ 25°C, after 30s @ 250°C 22.7 N/mm² (3,290 psi)
@ 250°C 1.7 N/mm² (250 psi)

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