LTCC (low-temperature co-fired ceramic) material with low dielectric constant, low loss and near-zero-temperature coefficient and preparation method

A technology with low dielectric constant and temperature coefficient, applied in the field of electronic ceramic materials and its manufacturing, can solve the problems of inability to co-fire low melting point metals, high sintering temperature, difficult low temperature sintering, etc. The effect of low production cost

Active Publication Date: 2017-07-07
上海晶材新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

3. Pure ceramic system, this type of material system is difficult to sinter at low temperature in many cases, and at the same time, some ceramic materials that can be sintered below 900 °C have some disadvantages of large dielectric loss, so the application occasions are relatively narrow
But BaSO 4 The sintering temperature of ceramics is high (~1300°C), and it cannot be directly co-fired with low melting point metals such as Ag and Cu; at the same time, BaSO 4 The resonant frequency temperature coefficient of ceramics is ~-50ppm / ℃, which cannot meet the actual application requirements
In order to reduce the sintering temperature, it is common to add low-melting point oxides, but the cooling range is limited and cannot reach sintering at 900°C; another method is to add low-melting point glass, but the existence of the glass phase greatly increases the dielectric loss of the material, which greatly increases the sintering temperature. BaSO 4 Development of Ceramic and Microwave Multilayer Devices

Method used

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  • LTCC (low-temperature co-fired ceramic) material with low dielectric constant, low loss and near-zero-temperature coefficient and preparation method
  • LTCC (low-temperature co-fired ceramic) material with low dielectric constant, low loss and near-zero-temperature coefficient and preparation method
  • LTCC (low-temperature co-fired ceramic) material with low dielectric constant, low loss and near-zero-temperature coefficient and preparation method

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Effect test

Embodiment 1

[0033] This embodiment provides a low dielectric constant, low loss, and near-zero temperature coefficient LTCC ceramic material, which is a glass-ceramic material made by combining glass and ceramics. The LTCC ceramic material includes the following components in parts by mass: x parts of BaSO 4 , y parts of BaO-B 2 o 3 -SiO 2 -Al 2 o 3 base glass material and z parts of TiO 2 , where x+y+z=100.

[0034] As an example, the LTCC ceramic material includes the following components in parts by mass: 60-75 parts of BaSO 4 , 20-40 parts of BaO-B 2 o 3 -SiO 2 -Al 2 o 3 Base glass material and 5-10 parts of TiO 2 .

[0035] As an example, the BaO-B 2 o 3 -SiO 2 -Al 2 o 3 The base glass material includes the following components by mass ratio: 25-35% BaO, 20-40% B 2 o 3 , 40-60% SiO 2 , 1-10% Al 2 o 3 , 0-2% MgO, and no more than 2% Na 2 O+K 2 O+Li 2 O. The present invention adopts the above-mentioned glass system because the glass (BBSAM) system has a lower...

Embodiment 2

[0050] This embodiment provides a LTCC ceramic material with low dielectric constant, low loss, and near-zero temperature coefficient and its preparation method. The basic scheme is as in Embodiment 1, wherein:

[0051] In this example, BaO-B 2 o 3 -SiO 2 -Al 2 o 3 Base glass material powder (BBSAM-2) is melted according to the following composition: BaO 25%, B 2 o 3 23%, SiO 2 44%, Al 2 o 3 5.5%, MgO 0.5%, Na 2 O 0.5%, K 2 O 0.5%, Li 2 O1%; the melting temperature is 1400°C, the melting time is 2hr, the glass is also poured into water to quench, and wet milled until the particle size D50 is about 2.5um.

[0052] The composition of the low temperature co-fired ceramic material is in parts by mass, and the proportion is: (100-a) (30% glass powder (BBSAM-2) + 70% barium sulfate (BaSO 4 ))+a titanium dioxide (TiO 2 ), wherein the range of a is 5-10. The mixture is wet ground until the particle size D50 is about 2.5um.

[0053] The obtained low-temperature co-fired ...

Embodiment 3

[0055] This embodiment provides a LTCC ceramic material with low dielectric constant, low loss, and near-zero temperature coefficient and its preparation method. The basic scheme is as in Embodiment 1, wherein:

[0056] In this example, BaO-B 2 o 3 -SiO 2 -Al 2 o 3 The base glass material powder is melted according to the following composition (BBSAM-3): BaO 20%, B 2 o 3 25%, SiO 2 47%, Al 2 o 3 5%, MgO 1%, Na 2 O 0.5%, K 2 O 0.5%, Li 2 O 1%; the melting temperature is 1400°C, the melting time is 2hr, the glass is also poured into water to quench, and wet milled until the particle size D50 is about 2.5um.

[0057] The composition of the low temperature co-fired ceramic material is in parts by mass, and the proportion is: 70 parts of barium sulfate (BaSO 4 ), 6 parts of titanium dioxide, 24 parts of BBSAM-3 glass. The mixture is wet ground until the particle size D50 is about 2.5um.

[0058] The resulting low-temperature co-fired ceramic material was sintered at 9...

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Abstract

The invention provides an LTCC (low-temperature co-fired ceramic) material with a low dielectric constant, low loss and a near-zero-temperature coefficient and a preparation method. According to the LTCC material, on the basis of a BaSO4 ceramic powder, glass of a BaO-B2O3-SiO2-Al2O3 system is adopted for assisted combustion to reduce sintering temperature, and TiO2 is adopted for adjusting a resonance frequency temperature coefficient, so that 900 DEG C low-temperature sintering can be realized. Under 60GHz, the dielectric constant of the LTCC material is 5.5-9, the low dielectric loss is smaller than 2*10<3>, and the near-zero-temperature coefficient is tua f-+/-10ppm/DEG C. In addition, the preparation method has the advantages of cheap production raw material, low production cost and simple preparation process. The LTCC material can be applied to manufacture of microwave devices such as low-temperature co-fired ceramic systems, multilayer dielectric resonators, microwave antennas and filters, and has high application value in industry.

Description

technical field [0001] The invention belongs to the field of electronic ceramic materials and its manufacture, and in particular relates to a LTCC ceramic material with low cost, low dielectric constant, low loss and near zero temperature coefficient and a preparation method thereof. Background technique [0002] Low temperature co-fired ceramic (Low Temperature Co-fired Ceramic, LTCC) technology is a new material technology developed by Hughes Company in 1982. , Through laser drilling, grouting, circuit screen printing and other processes to make the required circuit pattern, multi-layer laminated and sintered into a three-dimensional passive device below 900 ℃. At present, LTCC technology is widely used in the production of electronic components in the fields of microwave communication, semiconductor, optoelectronics, etc. It has the remarkable advantages of high integration and high performance. In recent years, whether it is a general-purpose electronic machine, communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/622C03C12/00
CPCC03C12/00C04B35/01C04B35/622C04B2235/3215C04B2235/3232C04B2235/365C04B2235/448
Inventor 兰开东
Owner 上海晶材新材料科技有限公司
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