ISO 16525-2:2014

Name: ISO 16525-2:2014 — Adhesives — Test methods for isotropic electrically conductive adhesives — Part 2: Determination of electrical characteristics for use in electronic assemblies
SKU: ISO 16525-2:2014
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Adhesives — Test methods for isotropic electrically conductive adhesives — Part 2: Determination of electrical characteristics for use in electronic assemblies

Название (английский):

ISO 16525-2:2014

Adhesives — Test methods for isotropic electrically conductive adhesives — Part 2: Determination of electrical characteristics for use in electronic assemblies

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 9 мая 2014 г.
Издание:: ISO IS 16525 edition 1 version 1
ICS:: 83.180

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Описание (английский):

ISO 16525-2:2014 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.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 16525-2:2014 specifies standardized test methods for isotropic electrically conductive adhesives (ICA) used in wiring, die attach and surface assembly of printed circuit boards in electronic devices. Part 2 focuses on the determination of electrical characteristics relevant to electronic assemblies - primarily volume resistivity and interfacial contact resistivity - using defined test circuit boards and measurement procedures.

Key topics and requirements

Scope and purpose: Evaluates electrical behavior of paste-type ICAs (heat-curing resin with dispersed metal particles) when used to interconnect electronic circuits.

Measured quantities:

Volume resistivity (ρ) - electrical resistance of the adhesive as a function of cross-sectional area/length; reported in Ω·m (or Ω·mm in test formula).
Interfacial contact resistivity (ρi) - resistance generated at the interface between the adhesive and the adherend (electrode), expressed per unit area.

Measurement principles:

Use of a four-probe method (two current terminals, two voltage terminals) and specially patterned test circuit boards to separate bulk resistivity from interfacial effects.
Volume resistivity calculated from applied current, measured voltage drop and adhesive geometry.
Interfacial resistivity determined by measuring resistances at multiple voltage taps along adhesive patterns and extrapolating the intercept via least-squares regression.

Test specimen preparation:

Screen-printing or masked application of ICA onto circuit substrates; recommended adhesive thickness ~0.10–0.15 mm.
Requirements for electrode plating/anti-oxidants and soldered wiring to ensure low lead resistance (≤ 0.01 Ω).

Test conditions:

Standard atmosphere: (25 ± 5) °C and (50 ± 10) % RH (ISO 554).
“Dry circuit” measurement constraints to avoid microstructure breakdown (limits noted for current/voltage).

Reporting: Detailed test report content is specified - adhesive identification, substrate/circuit dimensions, curing conditions, measurement conditions, and calculation parameters.

Applications and who uses it

Adhesive manufacturers - to characterize and certify electrical performance of ICAs.

Electronics OEMs and PCB assemblers - to select adhesives for wiring, die-attach and surface mount interconnects.

Test laboratories and quality engineers - for acceptance testing, comparison of formulations and failure analysis.

Materials and reliability engineers - to assess interface resistance contributions and to optimize assembly processes.

Related standards

ISO 16525 series (Parts 1–9) - general methods, heat-transfer, shear tests, environmental tests, signal transmission, etc.

Normative references cited: ISO 472, ISO 554, ISO 80000-1, IEC 60468, IEC 61249-2-7, EN 923, ASTM B539-02.

Keywords: ISO 16525-2, isotropic electrically conductive adhesives, volume resistivity, interfacial contact resistivity, test methods, electronic assemblies, PCB, four-probe method.

ISO 16525-2:2014

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and who uses it

Related standards

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