Investigation of the interfacial reactions and growth behavior of interfacial intermetallic compound between Sn37Pb solder and Au/Ni/Kovar substrate

Bao, Nifa; Hu, Xiaowu; Li, Qinglin

doi:10.1088/2053-1591/ab155f

Cited by 5 publications

(1 citation statement)

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“…Note that the use of classical lead–tin solders for the gold is limited due to the gold high solubility and the active formation of intermetallic compounds and embrittlement, which are typical for tin‐containing solders. [ 15–17 ] This is especially important for the needs of modern electronics, in which it is necessary to provide the preservation of the continuity of the conductive layers under exploitation process operation as well as during all technological processes, including soldering. In addition, there are some inconsistencies of the data and conclusions of various authors who studied the phase diagram of this contact pair.…”

Section: Introductionmentioning

confidence: 99%

Phase Diagram of In–Pb Alloy in Condensed Films

Дукаров

Petrushenko

Samsonik

et al. 2020

Physica Status Solidi (a)

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Two‐layer In–Pb films with a thickness from 50 to 200 nm, which are obtained by the method of sequential vacuum condensation, are used to study the phase diagram in this binary system. In–Pb films with a smooth composition change (0–100%) and annealing temperature (20–400 °C) are obtained within a single experimental cycle. The original method of variable composition and variable state is used. With this method of obtaining, the boundaries are observed on the substrate separating different regions of the film. X‐ray diffraction studies show that these areas correspond to different phase states of the sample and visualize the phase diagram of a binary system. The In–Pb phase diagram observed in the films generally corresponds to that for bulk samples. With an increase in the annealing temperature, the dispergation of the films intensifies. Below the liquidus temperature, the films consist of inhomogeneous in composition particles of irregular shape. Above the liquidus line, the films consist of homogeneous islands in the form of a spherical segment. Their size distribution is unimodal with a maximum; the position of which in a wide range does not depend on the concentration of the components.

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Section: Introductionmentioning

confidence: 99%