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Low-temperature co-fired glass ceramic composites and preparation method thereof

A glass-ceramic, low-temperature co-firing technology, applied in the field of low-temperature co-firing, can solve problems such as low thermal conductivity of materials

Active Publication Date: 2012-07-04
CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of the basic materials in the above technical reports all use aluminum nitride and glass materials to increase the thermal conductivity of the material, but the thermal conductivity of the prepared material is still low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Correspondingly, the present invention also provides a method for preparing a low-temperature co-fired glass-ceramic composite material, comprising the following steps:

[0042] Dissolving the fluoride, aluminum nitride and cordierite-based glass powders with a weight ratio of (5-10): (20-50): (45-75) in a solvent, adding a dispersant, an adhesive and a plasticizer After the preparation, the ball milling treatment is carried out to obtain the mixed slurry;

[0043] Tape-casting the mixed slurry after defoaming to obtain a green ceramic tape;

[0044] The green ceramic tape is hot-pressed and sintered at 800-950° C. and 20-30 MPa to obtain a low-temperature co-fired glass-ceramic composite material.

[0045] The cordierite-based glass material helps to lower the sintering temperature of the composite material, increase the sintered density, and reduce the content of the glass phase. The cordierite-based glass powder is prepared as follows: MgO, SiO 2 、Al 2 o 3 、TiO ...

Embodiment 1

[0059] 18wt% MgO, 50wt% SiO according to the formula ratio 2 , 20wt% Al 2 o 3 , 5wt%TiO 2 , 4 wt% B 2 o 3 , 3wt% Bi 2 o 3 , 260.12g Si(C 2 h 5 O) 4 Dissolve in ethanol, add dropwise 100gMg(NO 3 ) 2 , 125.3g Al(NO 3 ) 3 , 31.88g Ti(OC 4 h 9 ) 4 , 10.66 g H 3 BO 3 , 9.37gBi(NO 3 ) 3 ·5H 2 After the dropwise addition of the solution of O, adjust the pH value to about 9 with ammonia water. After obtaining the sol, heat it to 70°C in a water bath to realize the transformation from the sol to the gel, and then place the obtained transparent gel in a muffle furnace. Debinding at about 300°C for 2 hours, then heating up to 700-750°C and firing to obtain cordierite-based glass powder;

[0060] Take about 160g AlN, 14g LiF, 6g YF 3 , 220g cordierite-based glass powder (which includes the following components: 18wt% MgO, 50wt% SiO 2 , 20wt% Al 2 o 3 , 5wt%TiO 2 , 4 wt% B 2 o 3 , 3wt% Bi 2 o 3 , the particle size of the aluminum nitride used is about 3 μm, th...

Embodiment 2

[0065] 16wt% MgO, 50wt% SiO according to the formula ratio 2 , 22wt%Al 2 o 3 , 6wt% TiO 2 , 3wt%B 2 o 3 and 3 wt% Bi 2 o 3 Take 173.3g Si(C 2 h 5 O) 4 Dissolve in ethanol, drop 59.2gMg(NO 3 ) 2 , 92g Al(NO 3 ) 3 , 25.5g Ti(OC 4 h 9 ) 4 , 5.32 g H 3 BO 3 , 6.25g Bi(NO 3 ) 3 ·5H 2 After the dropwise addition of the solution of O, adjust the pH value to about 9 with ammonia water. After obtaining the sol, heat it to 70°C in a water bath to realize the transformation from the sol to the gel, and then place the obtained transparent gel in a muffle furnace. Debinding at about 300°C for 2 hours, then heating up to 700-750°C and firing to obtain cordierite-based glass powder;

[0066] Take the above glass powder 100g, LiF 6g, YF 3 4g, 90g of aluminum nitride, (the particle size is about 3 μm, the nitrogen content is greater than 33wt%, and the oxygen content is less than 0.3wt%) is immersed in the mixture of ethanol and acetone, and an appropriate amount of tribu...

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Abstract

The invention discloses low-temperature co-fired glass ceramic composites and a preparation method thereof. The composites comprise the following components in percentage by weight: 5-10% of fluoride, 20-50% of aluminium nitride and 45-75% of cordierite-based glass material prepared by a sol-gel method, wherein cordierite is a promising packaging material with excellent characteristics of mechanics, electrics, thermal expansion performance and low-temperature sintering and the like, while powders prepared by the sol-gel method has small particle size and large surface energy, which can be conductive to reduce the sintering temperature and dense sintering; the ALN (aluminium nitride) can play a role of improving the thermal conductivity of the composites; fluoride ions in the fluoride has stronger electronegativity, which can effectively reduce dielectric constant, and the fluoride can play a role of fluxing, which can facilitate to reduce the co-fired temperature of the composites. The thermal conductivity of the low-temperature co-fired glass ceramic composites prepared by the method disclosed by the invention can reach 18W / mK.

Description

technical field [0001] The invention relates to the technical field of low-temperature co-firing, and more specifically relates to a low-temperature co-fired glass-ceramic composite material and a preparation method thereof. Background technique [0002] The electronic substrate is the carrier of the semiconductor chip package, carrying the support of electronic components and forming the base of the electronic circuit. Traditional inorganic substrates use Al 2 o 3 , AlN and SiC, etc. are used as substrates, and have excellent performance in terms of thermal conductivity and flexural strength. However, the sintering temperature of the traditional substrate is above 1500°C. If the simultaneous co-firing method is used, the conductor material can only be selected from metals with high melting point and high resistance, such as Mo and W, which greatly increases the cost. [0003] Low-temperature co-fired ceramic (LTCC) technology has a lower sintering temperature, and metals...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16
Inventor 刘晏君普雪涛江林朱红伟刘明龙
Owner CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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