ISO 16525-2-2014 pdf download.Adhesives一Test methods for isotropic electrically conductive adhesives – Part 2: Determination of electrical characteristics for use in electronic assemblies.
This part of Iso 16525 specifies test methods for isotropic electrically conductive adhesives used in wiring, die attach, and surface assembly of printed circuit boards of electronic devices. The test methods focus on volume and interfacial contact resistivity.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, oniy the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 472, Plastics — Vocabulary
ISO 554, Standard atmospheres for conditioning and/or testing — Specifications
ISO 80000-1, Quantities and units — Part 1: General
IEC 60468, Method of measurement of resistivity of metallic materials
IEC 61249-2-7, Materials for printed boards and other interconnecting structures – Part2-7: Reinforced base materials clad and unclad – Epoxide woven E-glass laminated sheet of defined flammability (vertical burning test), copper-clad
EN 923, Adhesives — Terms and definitions
ASTM B539-02, Standard Test Met hods for Measuring Resistance of Electrical Connections (Static Contacts)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472, ASTM B539-02 and EN 923 and the following apply.
3.1 isotropic electrically conductive adhesive
<electronic assembly> resin that contains fillers, which provide electrical conduction, and functions as an adhesive
3.2 volume resistivity
electrical resistance of the isotropic electrically conductive adhesive for a given cross-sectional area or given length
Note 1 to entry: Electrical volume resistivity is converted to resistance per given cross-sectional area or given length of the isotropic electrically conductive adhesive. This part of ISO 16525 specifies measurement methods for an isotropic electrically conductive adhesive, which is applied to a circuit board that is similar to the one used in practice.
Note 2 to entry: It is expressed as ohm metre (Q.m).
3.3 interfacial contact resistivity
electrical resistance that is generated on the contactsurface between the isotropic electrically conductive adhesive and the adherend
Note 1 to entry: It is expressed as electrical resistance per given cross-sectional area (2-m2).
Note 2 to entry: Interfacial contact resistance is generated on the contact surface between the isotropic electrically conductive adhesive and the electrode, and it is thought to be associated with the dispersion of the metal component in the vicinity of the electrode interface, oxide film, and the arrangement of conductive particles contained in the isotropic electrically conductive adhesive. In addition, interfacial contact resistivity fluctuates during the endurance test. Apart from the resistance component brought by electrically volume resistivity of the isotropic electrically conductive adhesive, if a resistance component is placed on the contact surface, interfacial resistance is expressed by resistivity per given area and is converted to resistance per given cross-sectional area or length of the isotropic electrically conductive adhesive.ISO 16525-2 pdf download.
Tags: Adhesives
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