Determination of thermophysical properties for polymer films using conduction analysis of laser heating

    Authors

    C. Zhang; I. A. Salama; N. R. Quick;A. Kar

    Comments

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    Abbreviated Journal Title

    Int. J. Thermophys.

    Keywords

    laser heating; polymers; thermal conductivity; thermal diffusivity; THERMAL-DIFFUSIVITY; FLASH METHOD; Thermodynamics; Chemistry, Physical; Mechanics; Physics, Applied

    Abstract

    Determination of the thermophysical properties of thin film materials is important for modeling and optimizing laser microvia drilling of organic substrates in microelectronics applications. Techniques to measure the density, thermal conductivity, thermal diffusivity, thermal decomposition point, and specific ablation heat of thin polymer films are described. An experimental apparatus was set up for laser heating of the sample. To measure the thermal diffusivity, an analytic heat transfer model is developed. One-dimensional heat conduction is assumed due to the small thickness of the film compared to the radius of the laser beam. The value of thermal diffusivity is obtained by fitting the experimental data to the theory. The specific ablation heat is obtained by measuring the mass loss during laser ablation. The experimental apparatus and the property determination methodology can also be applied to thin samples of other materials.

    Journal Title

    International Journal of Thermophysics

    Volume

    28

    Issue/Number

    3

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    980

    Last Page

    995

    WOS Identifier

    WOS:000249503400019

    ISSN

    0195-928X

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