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LTCC LTCC ie, has a thermal expansion coefficient is adjustable, good thermal conductivity, dielectric properties of adjustable features. This study is a LTCC substrate, thick film preparation process, including the various process conditions on the slurry, the ceramic green tape and substrate effects, summed up a relatively mature technology route. Experiments using glass / ceramic composite system, select CBS series glass frit and alumina, respectively additives and ceramic materials. Paper first introduces the research background, Introduction of LTCC technology development and application, focusing on the LTCC substrate composition, development and research progress, finally introduces the cast and technological development and for casting the slurry. This paper analyzes the characteristics of various oxides as well as glass powder properties, and explore the sintering temperature and composition on the glass softening temperature, the resulting glass powder can be found in 650 ℃ 8 00 ℃ of Softening. The resulting glass powder formula is: (47 5 3) SiO 2 (8 1 1) B 2 O 3 (30 3 7) CaO (2 4 ) Al 2 O 3 (0.6 1 ) Na 2 CO 3 (0.3 0 .6) K2CO 3 , the formula for the mass ratio of the glass powder material. For different types of paper frit, different glass content and sintering the ceramic properties of the system were studied to obtain the best summarized glass frit and ceramic formulations. The formulation of the best ceramic sintering temperature is 900 ℃, the main properties of the sample include: density of 2.9g/cm 3 , flexural strength reaches 140MPa, a dielectric constant of 4.9 7 < / sup> .9, the dielectric loss of 10.3 '10-4, the thermal expansion coefficient of 5.12ppm / ℃. Experimental composition and properties of the slurry were studied, including the scale and size of solid particles, a binder, a thickener, a solvent and a dispersant on the stability and viscosity of the slurry, a more sophisticated experiments finally obtained slurry composition: (40 5 0) solid powder (16 2 0) in ethanol (27 3 2) PVB (10% ethanol solvent) ( 1.5 2 ) terpineol (1.5 2 ) polyethylene glycol -400 (PVB system). Paper finally analyzes the raw tape and the surface morphology of the ceramic substrate, summed up the main progress achieved in topics and results, and proposed at this stage the inadequacies of the work for the next phase of work is suggested.
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