Glass Binder in Thick Film Metallization Paste for AlN

Abstract

In this paper, the sol-gel process was used to synthesize a glass binder in thick-film paste for aluminum nitride (AlN) metallization. Some major factors that influenced the sol-gel process including PH value, quantity of water were discussed in detail. The xerogel was analyzed by means of TG-DSC in order to determine its optimum heat treatment process. Meanwhile, the sintering behavior of silver/glass composite thick film had been studied by varying the glass content. The results show that a glass powder of a low melting point and chemically compatible with AlN substrate can be obtained by sol-gel method when the composition (wt %) is CaO (40), B2O3 (15), SiO2 (35), BaO (10). During sintering, the glass becomes liquid and largely affects the microstructure development and square resistance of the thick film. When the glass content is optimum (10wt %), the film adhesion strength achieves maximum and the square resistance has a relatively low value.

The silver paste containing ZnO-B2O3-SiO2 glass sintered at high temperature with low solid content formed high performance conductive thick film on MgTiO3 microwave ceramics

“…Si [34] 800 °C/10 min 2.00 --AlN [35] 850 °C/10 min -4.00 11.7 Si [36] 800 °C/10 min -5.90 -AlN [37] 850 °C/15 min -5.30 12.7 AlN [33] 850 °C/10 min -0.93 6.7 Al 2 O 3 [28] 600 °C/15 min 2.50 -28.5 Al 2 O 3 [38] 850 °C/10 min 2.87 -14.6 AlN [16] 850 °C/15 min -0. 9, in which obvious cracks are visible at the interface between the silver layer and MgTiO 3 ceramic substrate.…”

Effect of Excess Li₂CO₃ Addition on the Physical and Electrical Properties of Lead-Free Bi_0.5(Na_0.82K_0.18)_0.5TiO₃ Ceramics

“…Perovskite structure BNT ceramics reported by Smolensky et al [1] is considered as the one of the candidates for lead-free piezoelectric ceramics because of its strong ferroelectric properties and high Curie temperature (T c = 320 o C). At room temperature, BNT ceramics are strongly ferroelectric with a relatively large remnant polarization and large coercive field of 70 kV/cm Some modifications of BNT ceramics have proved to be helpful by forming solid solution with other perovskite oxides, [2][3][4][5][6][7][8] such as CaTiO 3 ,[2] BaTiO 3 ,[3] La 0.01 TiO 3 ,[4] BiScO 3 , [5] (Sr 0.5 Ca 0.5 )TiO 3 , [6] Ba(Ti 0.92 Sn 0.08 )O 3 , [7] (Bi 0.5 K 0.5 )TiO 3 , [8] etc. (Bi 0.5 K 0.5 )TiO3 ceramics are lead-free piezoelectric materials, which have a tetragonal symmetry at room temperature and show good piezoelectric response.…”