Low-temperature co-fired ceramic tape casting material and preparing method and application thereof

A low-temperature co-fired ceramic and green tape technology is applied in the field of electronic ceramic substrate materials and their manufacturing, which can solve the problems of difficulty in meeting the uniform dispersion of components, great harm to the human body and the environment, and limited solubility of binders, and promote independent production. and research and development, beneficial to tape casting, and the effect of solving the problem of silver diffusion

Active Publication Date: 2014-01-01
ZHEJIANG SIRAMIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, toluene, xylene (patent publication numbers CN101077835A, CN103145336A) and other toxic organic solvents are mainly used as solvents in LTCC casting slurry, which are very harmful to human body and environment, and are not conducive to environmental protection
In addition, the low-temperature co-fired ceramic slurry disclosed in Chinese patent CN103044035A uses methanol, ethanol and / or propanol as a solvent, but the solvent system has limited solubility to the binder, and it is difficult to satisfy the uniform dispersion of each component

Method used

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  • Low-temperature co-fired ceramic tape casting material and preparing method and application thereof
  • Low-temperature co-fired ceramic tape casting material and preparing method and application thereof
  • Low-temperature co-fired ceramic tape casting material and preparing method and application thereof

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preparation example Construction

[0031] Another aspect of the present invention provides a method for preparing the above-mentioned low temperature co-fired ceramic green tape material. As an example, the following steps may be included.

[0032] (1) CaO-Al 2 o 3 -B 2 o 3 -SiO 2 The oxide raw materials in the glass are uniformly mixed in an alumina mortar according to the composition formula, and then the mixed raw materials are moved into a quartz crucible.

[0033] (2) Put the quartz crucible containing raw materials into a high-temperature melting furnace, raise it from room temperature to 1300-1500°C at a rate of 5-10°C / min, and keep it warm for 1-2 hours to ensure uniform glass liquid, and then melt the The good glass liquid is poured directly into cold deionized water to form cullet particles.

[0034] (3) Wet ball milling of broken glass particles, for example, can be put into a ball mill jar together with balls and absolute ethanol according to a certain weight percentage, milled in a planetary ...

Embodiment 1

[0051] First, the raw materials for preparing borosilicate glass powder were weighed by weight percentage of 25wt%CaO, 15wt%Al 2 o 3 , 19wt%B 2 o 3 , 40wt%SiO 2, 1wt% CuO, mixed evenly, moved into a quartz crucible, then put into a high-temperature furnace, raised from room temperature to 1400°C at a rate of 8°C / min, and kept for 2 hours to ensure a uniform glass liquid. Then pour the molten glass directly into cold deionized water to form broken glass particles, then put the broken glass particles, grinding balls and absolute ethanol into a ball mill jar according to a certain weight percentage, Ball milling in a ball mill for 24 hours and drying to obtain No. 2 borosilicate glass powder with an average particle size of 0.5 μm.

[0052] Secondly, according to the content of each component of the two low-temperature co-fired ceramic green tape materials given in Table 3, the casting slurry was prepared. Weigh the above-prepared No. 2 borosilicate glass powder and alumina ...

Embodiment 2

[0061] The green tape material used to prepare the LTCC substrate can be prepared by the method described in Example 1. Cut the prepared rolled LTCC green tape material into single-layer LTCC green tapes of the same size, and print the required electrode pattern on the surface of the LTCC green tape by screen printing process, then, 20 pieces of single-layer LTCC green tape The stack was positioned and formed using hot isostatic pressing (45MPa, 70°C). Then, put the LTCC substrate blank formed by hot isostatic pressing into the muffle furnace, raise the temperature to 450°C at 1.5°C / min and keep it for 60 minutes to remove the organic matter in the sample, and then raise the temperature to 850°C at 10°C / min Keep warm for 15 minutes to get as image 3 LTCC substrate sample shown.

[0062] Industrial Applicability: The present invention selects alcohol-ester mixed solvent in the casting slurry for preparing ceramic green tape, which is relatively low in cost and environmentall...

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Abstract

The invention relates to a low-temperature co-fired ceramic tape casting material and a preparing method and application of the low-temperature co-fired ceramic tape casting material. The low-temperature co-fired ceramic tape casting material comprises, by weight, 35-50% of inorganic-phase components and 50-65% of organic-phase components. The inorganic-phase components include borosilicate glass powder and aluminum oxide ceramic powder, wherein the weight ratio of the borosilicate glass powder to the aluminum oxide ceramic powder is 2:3-3:2, and the borosilicate glass powder includes CuO which accounts for less than 3% of the power in weight. The organic-phase components include a solvent, an adhesion agent, a plasticizing agent and a dispersing agent, wherein the solvent is an alcohol-ester mixed solvent, and alcohol accounts for 20-70% in the mixed solvent in weight.

Description

technical field [0001] The invention relates to a low-temperature co-fired ceramic raw belt material, a preparation method and application thereof, and belongs to the field of electronic ceramic substrate materials and the manufacture thereof. Background technique [0002] Low temperature co-fired ceramics (Low temperature co-fired ceramics, LTCC) as a ceramic packaging substrate material, has low dielectric constant and loss, low thermal expansion coefficient (matched with silicon), high chemical stability, good mechanical performance, and can be integrated with high-conductivity metals (such as gold, silver, copper, etc.) at 900 ° C to achieve many advantages such as multi-layer wiring of ceramic substrates. packaging and device manufacturing. LTCC substrate materials are mainly composed of glass / ceramic composites. In the LTCC substrate materials that have been applied in the market, the base material generally uses borosilicate glass with low softening point, and the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/622
Inventor 刘志甫马名生李永祥
Owner ZHEJIANG SIRAMIC TECH CO LTD
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