Method for preparing low-dielectric-constant low-temperature co-fired ceramic (LTCC) powder with sol-gel method

Abstract

The invention relates to the field of ceramic powder manufacturing, in particular to a method for preparing low-dielectric-constant low-temperature co-fired ceramic (LTCC) powder with a sol-gel method. The method includes the following steps that firstly, materials are taken; secondly, low-softening-point CaO-B2O3-SiO2 (hereinafter referred to as CBS) precursor powder is prepared, wherein tetraethoxysilane, ethyl alcohol and a proper amount of water are added into a container, a uniform and transparent solution is prepared, tributyl borate is slowly dropwise added into the solution, and firstliquid is prepared. The formula is simpler and more scientific and reasonable, boron is introduced by tributyl borate, tributyl borate is dropwise added, and therefore boron with the higher mass can be introduced on the premise of forming sol. Thus, the precursor powder can have a lower softening point, the low-temperature co-fired ceramic powder obtained after the precursor powder and CBS glass powder are mixed and electronic paste are not subjected to permeation in the firing process, and the practical requirement can be completely met.

Description

technical field [0001] The invention relates to the field of ceramic powder production, in particular to a method for preparing a low-dielectric constant low-temperature co-fired ceramic powder by using a sol-gel method. Background technique [0002] Low temperature co-fired ceramics (Low temperature co-fired ceramics, LTCC) can be integrated with high-conductivity metals (such as gold, silver, copper, etc.) Chip materials have similar thermal expansion coefficients, high chemical stability, and good mechanical properties and many other advantages. When used as an electronic packaging substrate material, LTCC materials must have a low relative dielectric constant to reduce signal delay, and have low dielectric loss to ensure signal transmission quality. In addition, they must be compatible with metals such as silver or copper. Co-firing below 950°C. [0003] At present, there is no process for preparing low-dielectric constant low-temperature co-fired ceramic (LTCC) powder...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no process for preparing low-dielectric constant low-temperature co-fired ceramic (LTCC) powder by using the sol-gel method in China. The process of low-temperature co-fired ceramic (LTCC) powder under the existing technology needs to introduce boron in the production process. element, and the introduction of boron element is made of refined boron powder as raw material, which finds suitable dispersion conditions in the raw material, and then reasonably integrates into the ceramic body. However, when boron is introduced in this way, its softening point is not easy to control. The production process of ceramic powder is relatively high, and unqualified products are prone to appear in the production process, which greatly reduces the production quality and efficiency of co-fired ceramic powder. Alkali metal elements such as K and Na and heavy metal elements such as Pb are often contained in the production process. During, before and after production, these heavy metal elements and alkali metal elements harmful to the environment cannot be treated well and are discharged into the environment at will. In the process, it will cause serious pollution to the environment and destroy the ecological environment, and when collecting and processing these pollutants, it is necessary to set up an additional treatment process, which increases the production cost of the product to a certain extent and reduces the market competitiveness of the enterprise.