Borosilicate glass-spherical alumina low temperature co-fired ceramic green tape and preparation method thereof

A technology of borosilicate glass and low-temperature co-fired ceramics, which is applied in the field of low-temperature co-fired ceramic materials in multiphase glass-ceramic systems, can solve problems such as anisotropy, and achieve the effect of smooth surface and excellent dielectric properties

Active Publication Date: 2013-06-12
凤阳凯盛硅材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the anisotropic problem of the sintering shrinkage of the traditional LTCC green tape, and provide a borosilicate glass and spherical alumina low temperature co-fired ceramic green tape and its preparation method

Method used

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  • Borosilicate glass-spherical alumina low temperature co-fired ceramic green tape and preparation method thereof
  • Borosilicate glass-spherical alumina low temperature co-fired ceramic green tape and preparation method thereof
  • Borosilicate glass-spherical alumina low temperature co-fired ceramic green tape and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Select non-spheroidized alumina powder (3~5um) as the ceramic filling phase in the inorganic powder contained in the green ceramic tape, select polyvinyl butyral as the binder in the organic casting system, and make Compared:

[0031] According to the ratio of parts by weight, weigh B 2 o 3 18kg, SiO 2 65kg, Al 2 o 3 8kg, MgO 5kg, K 2 O 2kg, Na 2 O 2kg, mixed for 12 hours, placed in a platinum crucible, kept at 1500~1600°C for 3 hours, poured into deionized water to obtain transparent and uniform borosilicate glass shards.

[0032] Use corundum counter-rollers to crush the prepared glass fragments to obtain coarse glass powder with an average particle size of 0.5~1mm. Mix the coarse glass powder with deionized water, and use zirconia balls as the ball milling medium. According to the material: ball: water = 1 : 3:0.8 ratio of ball milling for 8 hours, placed in an oven at 120°C for 4 hours to obtain borosilicate glass powder with an average particle size of 0.5...

Embodiment 2

[0043] Select 1# non-spherical alumina powder (3~5um) and 2# spherical alumina powder (3~6um) as the ceramic filling phase in the inorganic powder contained in the green ceramic belt, and choose ethyl methacrylate, methyl Acrylic acid is used as the binder in the organic casting medium. The preparation method of the green porcelain tape is the same as in Example 1. The formula of the green porcelain tape and the performance of the sintered porcelain body are shown in Table 3 and Table 4 (ceramic in the inorganic powder contained in the 1# sample Phases are non-spherical alumina, 2# is spherical alumina);

[0044] Table 3 Contents of each component of borosilicate glass-alumina low temperature co-fired ceramic green tape2

[0045]

[0046] Table 4 Sintering and dielectric properties of borosilicate glass-alumina low temperature co-fired ceramic green tape 2

[0047]

[0048] Comparing Example 1 and Example 2, under the condition that the viscosity of the slurry is guaran...

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Abstract

The invention discloses a borosilicate glass-spherical alumina low temperature co-fired ceramic (LTCC) green tape and its preparation method. The green tape is composed of a glass-ceramic composite material and a casting medium. Specifically, the glass-ceramic composite material consists of borosilicate glass and spherical alumina. The casting medium consists of a mixed solvent, a monomer binder, a plasticizer and a dispersing agent. The low temperature co-fired ceramic green tape prepared in the invention has a level and smooth surface, a solid content up to 88-92wt%, and a firing shrinkage rate of 9-11%. The difference between the sintering shrinkage rate of each direction is small. And the green tape can achieve wiring co-firing with Au, Ag and other low melting point metals at 850DEG C. The raw material tape sintered ceramic body provided in the invention has excellent dielectric properties. Under the condition of less than 10GHz, the dielectric constant (epsilon r) of 7-8, the dielectric loss (Tan delta) is less than 2*10<-3>, and effectively solves the anisotropy problem of traditional LTCC green tape sintering shrinkage.

Description

technical field [0001] The invention relates to a low-temperature co-fired ceramic material of a complex-phase glass-ceramic system, which belongs to the field of functional ceramics for high-density packaging. Background technique [0002] In recent years, the development of information technology requires high-speed data and high current density transmission, and electronic circuits are increasingly developing in the direction of miniaturization, integration, and high frequency. Low price and high integration requirements. Low-temperature co-fired ceramic technology (LTCC) is a new material technology developed by Hughes Company in 1982. It is to make low-temperature sintered ceramic powder into a green ceramic tape with precise thickness and density. paste, precision conductor paste printing and other processes to make the required circuit patterns, and embed multiple passive components (such as low-capacity capacitors, resistors, filters, impedance converters, couplers,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00
Inventor 彭寿王芸彭程方亮曹志强周鸣
Owner 凤阳凯盛硅材料有限公司
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