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Effect of surface roughness of AlN substrate and sintering temperature on adhesion strength of Ag thick film conductors

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2020, 30(3), pp.83-90
  • DOI : 10.6111/JKCGCT.2020.30.3.083
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : May 4, 2020
  • Accepted : May 18, 2020
  • Published : June 30, 2020

Bonkeup Koo 1

1한밭대학교

Accredited

ABSTRACT

The effect of substrate surface roughness and sintering temperature on the adhesion strength of Ag-based thick film conductors formed on AlN substrates with excellent thermal conductivity was studied. The adhesion strength of the thick-film conductor manufactured using an AlN substrate having a surface roughness (Ra) of 0.5 was higher than that of a thick-film conductor manufactured using a substrate having a surface roughness greater or smaller than this. In the case of a substrate with a surface roughness of less than 0.5, the contact area between the Ag thick film conductor and the substrate was relatively smaller than that of a substrate with a surface roughness of 0.5, resulting in a lower adhesive strength. On the other hand, when a substrate having a surface roughness of more than 0.5 was used, it was found that the conduct or film was not completely adhered to the substrate, and as a result, it was found that the adhesive strength was small. In addition, it was found that the surface smoothness of the Ag-based thick film conductor film obtained by sintering at 850°C was the best compared to the smoothness of the conductor film obtained by sintering at different sintering temperatures,and as a result, it was found that the adhesive strength of the conductor film was the highest.

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