Abstract
We have been developing an in-plain thermal conductivity measuring method of flat plate specimen such as printed wiring board (PWB) by straight fin temperature fitting method. We applied one point radiation thermometer axially moving automatically for measuring the axial temperature distribution of the speciment. From thr experimental investigation, we obtained the following conclusions. (1) By applying the temperature fitting to the range of above 5K temperature rise, the in-plane thermal conductivity of the specimen was obtained within 10% dispersion under the condition of the fin efficiency of 0.2〜0.85 in spite of temperature fluctuation of ±1K of one point radiation thermometer. (2) By using mean heat transfer conductivity of the specimen was obtained within 10 % dispersion under fin efficiency lower than 0.2.
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