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Modified calcium-boron-lanthanum glass powder, green tape, dielectric constant controllable LTCC substrate, packaging material and preparation method thereof

A dielectric constant and glass powder technology, which is applied in the field of glass powder surface modification, can solve problems such as unfavorable powder dispersion, and achieve the effects of enhanced powder suspension stability, good suspension stability, and improved substrate densification

Pending Publication Date: 2022-04-26
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of preparing glass powder, under the joint action of oxygen and water vapor, a large number of hydroxyl groups will be generated on the glass surface, which is not conducive to the dispersion of powder in organic solvents.

Method used

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  • Modified calcium-boron-lanthanum glass powder, green tape, dielectric constant controllable LTCC substrate, packaging material and preparation method thereof
  • Modified calcium-boron-lanthanum glass powder, green tape, dielectric constant controllable LTCC substrate, packaging material and preparation method thereof
  • Modified calcium-boron-lanthanum glass powder, green tape, dielectric constant controllable LTCC substrate, packaging material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0045] Some embodiments of the present invention provide a method for preparing a modified calcium boron lanthanum glass powder, comprising the following steps:

[0046] S1 Mix the surface modifier, water, absolute ethanol and acid-base regulator to obtain a mixed solution with a pH value of 1-5, and stir the mixed solution to obtain a dissolved surface modifier solution;

[0047] S2 mixes the calcium boron lanthanum glass powder, the dissolved surface modifier solution obtained in step S1, water, absolute ethanol and an acid-base regulator to obtain a mixed solution with a pH value of 3-6, and stir the mixed solution to modify properties, followed by ultrasonic cleaning, drying and sieving to obtain the modified calcium boron lanthanum glass powder.

[0048] In the above-mentioned technical solution, in step S1, wherein the mass percentage of the water in the first mixed solution is 25-45wt%; by controlling the ratio of water to the first mixed solution in the range of 25-45w...

Embodiment 1

[0076] This example provides a method for preparing a LTCC substrate with a controllable dielectric constant. The specific steps are as follows: (1) Preparation of modified powder: use an electronic balance to weigh 25g of water and 50g of absolute ethanol and add it to a pre-dried In a 250ml beaker, mix well, then weigh 0.5g surface modifier KH-570 with an electronic balance and add them to the above beaker, then add acetic acid to adjust the pH value of the mixed solution to 3.5. Place the beaker in a magnetic stirrer and stir at room temperature 25°C for 2 hours. When there are no obvious suspension beads and no stratification in the liquid in the beaker, it means that the stirring is over. In addition, weigh 100 g calcium boron lanthanum glass powder (its composition and molar ratio is: the molar ratio of each component of the glass powder is: CaO: 20.0%, B 2 o 3 : 52.0%, La 2 o 3 : 15.0%, SiO 2 : 2.8%, NaCO 3 : 4.2%, P 2 o 5 : 6.0%; particle size is 1.7 microns) in...

Embodiment 2

[0080] This example provides a method for preparing an LTCC substrate with a controllable dielectric constant. The difference between it and Example 1 is that the amount of the surface modifier KH-570 is 1 g.

[0081] The 48h sedimentation ratio H / H of the modified calcium boron lanthanum glass powder prepared in this example in ethyl acetate 0 It is 0.46, and the Zeta potential in the acidic environment of pH=6 is 16.7; the heat loss in the air atmosphere of 850°C is 0.89%; the particle size is 1.3 microns. The batch of LTCC substrates thus prepared has a dielectric constant of 6.37-6.42 at 12-18 GHz.

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Abstract

The invention discloses modified calcium boron lanthanum glass powder, a green tape, an LTCC (Low Temperature Co-Fired Ceramic) substrate with a controllable dielectric constant, an LTCC packaging material and a preparation method of the LTCC packaging material. The preparation method of the modified calcium-boron-lanthanum glass powder comprises the following steps: mixing a surface modifier, water, absolute ethyl alcohol and an acid-base regulator to obtain a first mixed solution with the pH value of 1-5, and stirring the first mixed solution to obtain a dissolved surface modifier solution; and mixing calcium-boron-lanthanum glass powder, the obtained dissolved surface modifier solution, water, absolute ethyl alcohol and an acid-base regulator to obtain a second mixed solution with the pH value of 3-6, stirring and modifying the second mixed solution, and then performing ultrasonic cleaning, drying and screening to obtain the modified calcium-boron-lanthanum glass powder. Single glass powder is subjected to surface modification through a surface modification method, the viscosity of tape casting slurry can be controlled, the dispersity of the powder can be improved, the densification degree in the green tape sintering process is improved, and therefore the LTCC substrate with the controllable dielectric constant is obtained.

Description

technical field [0001] The invention relates to the field of surface modification of glass powder, in particular to a modified calcium boron lanthanum glass powder, green ceramic tape, LTCC substrate with controllable dielectric constant, LTCC packaging material and a preparation method thereof. Background technique [0002] With the rapid development of information technology, great progress has been made in the field of electronics and communication technology. Low-temperature co-fired ceramic (LTCC) technology is a striking interdisciplinary integrated component technology emerging in recent years, which provides a better solution for the miniaturization and light weight of components and modules of various electronic systems in the information age. Low Temperature Co-fired Ceramics (LTCC) is a multilayer ceramic substrate manufacturing technology integrating interconnection, passive components and packaging. It was first developed by Hughes in 1982. Its basic principle ...

Claims

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Application Information

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IPC IPC(8): C03C23/00C03C12/00C04B35/10H01L21/48
CPCC03C23/0095C04B35/10C03C12/00H01L21/4846C04B2235/36
Inventor 吕子彬海韵郭恩霞曹禹徐博吕金玉韩滨祖成奎
Owner CHINA BUILDING MATERIALS ACAD
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