CN-121651887-B - Nickel-coated multilayer ceramic substrate and preparation method thereof

Abstract

The invention relates to the technical field of ceramic substrates, and provides a nickel-coated multilayer ceramic substrate and a preparation method thereof. The nickel-coated multilayer ceramic substrate comprises an aluminum oxide ceramic substrate and a nickel-coated layer arranged on at least one side of the aluminum oxide ceramic substrate, wherein the aluminum oxide ceramic substrate comprises, by weight, 70-90 parts of aluminum oxide, 5-8 parts of a sintering aid, 80-100 parts of a solvent, 10-12 parts of a binder and 0.5-2 parts of a dispersing agent, and the sintering aid comprises a corundum-mullite composite material and a zirconia-silicon carbide composite material. By the technical scheme, the problem of insufficient strength of the nickel-coated multilayer ceramic substrate in the related technology is solved.

Inventors

• GAO SHAN
• JIN HUAJIANG
• LI JIE
• Liang Pengjie
• LI LEI
• ZHANG XUELI
• YAN KUN
• Ai Xiaopei
• ZHU BOHUA

Assignees

• 河北鼎瓷电子科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260205

Claims (7)

1. 1. The nickel-coated multilayer ceramic substrate is characterized by comprising an aluminum oxide ceramic substrate and a nickel-coated layer arranged on at least one side of the aluminum oxide ceramic substrate; The alumina ceramic substrate comprises, by weight, 70-90 parts of alumina, 5-8 parts of a sintering aid, 80-100 parts of a solvent, 10-12 parts of a binder and 0.5-2 parts of a dispersing agent, wherein the sintering aid comprises a corundum-mullite composite material and a zirconia-silicon carbide composite material; the mass ratio of the corundum-mullite composite material to the zirconia-silicon carbide composite material is 1:4-4:1; the corundum-mullite composite material comprises raw materials of kaolin and diaspore in a mass ratio of 1-2:3; The zirconia-silicon carbide composite material comprises zirconia and silicon carbide in a mass ratio of 4:0.2-0.8.
2. 2. The nickel-coated multilayer ceramic substrate according to claim 1, wherein the preparation method of the corundum-mullite composite material comprises the steps of ball milling, mixing, hot-pressing, sintering and crushing raw materials of the corundum-mullite composite material to obtain the corundum-mullite composite material.
3. 3. The nickel-coated multilayer ceramic substrate according to claim 1, wherein the preparation method of the zirconia-silicon carbide composite material comprises the steps of ball milling, mixing, hot-pressing, sintering and crushing raw materials of the zirconia-silicon carbide composite material to obtain the zirconia-silicon carbide composite material.
4. 4. The nickel-clad multilayer ceramic substrate according to claim 1, wherein the dispersant comprises polyacrylate.
5. 5. The nickel-clad multilayer ceramic substrate according to claim 1, wherein the binder comprises a water-soluble polymer.
6. 6. A method for producing the nickel-coated multilayer ceramic substrate according to any one of claims 1 to 5, comprising the steps of: S1, mixing aluminum oxide, a sintering aid, a dispersing agent and a solvent to obtain a mixture; s2, adding a binder into the mixture, mixing, casting, forming and drying to obtain a green ceramic tile; S3, punching the raw ceramic chip, and performing surface printing, lamination, vertical conduction, cutting, sintering and cooling to obtain an alumina ceramic substrate; and S4, after ultrasonic cleaning is carried out on the aluminum oxide ceramic substrate, placing the aluminum oxide ceramic substrate into chemical nickel plating solution for chemical nickel plating, and drying to obtain the nickel-coated multilayer ceramic substrate.
7. 7. The method for preparing the nickel-coated multilayer ceramic substrate according to claim 6, wherein each 1L of the electroless nickel plating solution comprises the following components of 20-25 g of nickel sulfate, 20-25 g of sodium hypophosphite, 25-35 g of sodium citrate, 0.001-0.004g of sodium dodecyl sulfate, 3-6 g of sodium acetate and 5-10 g of boric acid; The sintering temperature is 1600-1700 ℃.

Description

Nickel-coated multilayer ceramic substrate and preparation method thereof Technical Field The invention relates to the technical field of ceramic substrates, in particular to a nickel-coated multilayer ceramic substrate and a preparation method thereof. Background In the rapid development of the modern electronic information industry, electronic devices are continuously evolving towards high integration, high power density and miniaturization, which puts more stringent demands on the performance of electronic package substrates. The nickel-coated multilayer ceramic substrate has the characteristics of excellent high temperature resistance, heat conduction property, good insulating property and the like, is widely applied to the high-end electronic fields such as power electronic modules, radio frequency microwave devices, optoelectronic components and the like, and becomes a key basic component for guaranteeing stable and efficient operation of electronic equipment. However, in the practical application process, the nickel-coated multilayer ceramic substrate has a problem of insufficient strength despite having good high temperature resistance and insulation properties, and is susceptible to internal defects such as cracks and the like when subjected to external impact, vibration or thermal stress, thereby causing the overall strength of the substrate to be reduced. The nickel-coated layer is usually made of pure nickel or nickel alloy, and has good ductility and conductivity, but the bonding strength with the ceramic substrate is affected by various factors, if the bonding interface has defects (such as pores, oxide layers, impurities, etc.), the nickel layer and the ceramic substrate are easily peeled off when the substrate is subjected to external force or thermal cycle, and the problem of insufficient strength of the substrate is further aggravated. Therefore, there is a need to develop a high-strength nickel-clad multilayer ceramic substrate to widen its application in the field of electronic packaging. Disclosure of Invention The invention provides a nickel-coated multilayer ceramic substrate and a preparation method thereof, which solve the problem of insufficient strength of the nickel-coated multilayer ceramic substrate in the related art. The technical scheme of the invention is as follows: the invention provides a nickel-coated multilayer ceramic substrate, which comprises an alumina ceramic substrate and a nickel-coated layer arranged on at least one side of the alumina ceramic substrate; the alumina ceramic substrate comprises, by weight, 70-90 parts of alumina, 5-8 parts of a sintering aid, 80-100 parts of a solvent, 10-12 parts of a binder and 0.5-2 parts of a dispersing agent; the sintering aid comprises a corundum-mullite composite material and a zirconia-silicon carbide composite material. As a further technical scheme, the mass ratio of the corundum-mullite composite material to the zirconia-silicon carbide composite material is 1:4-4:1. As a further technical scheme, the corundum-mullite composite material comprises kaolin and diaspore with the mass ratio of 1-2:3, wherein the mass ratio of the kaolin to the diaspore can be 1:3, 1.2:3, 1.4:3, 1.6:3, 1.8:3 and 2:3, for example. As a further technical scheme, the zirconia-silicon carbide composite material comprises zirconia and silicon carbide with the mass ratio of 4:0.2-0.8, wherein the mass ratio of the zirconia to the silicon carbide can be, for example, 4:0.2, 4:0.4, 4:0.6, 4:0.7 and 4:0.8. As a further technical scheme, the raw materials of the zirconia-silicon carbide composite material further comprise a sintering aid, wherein the sintering aid comprises aluminum oxide, and the mass ratio of the sintering aid to the zirconium oxide is 0.1-0.3:4. The preparation method of the corundum-mullite composite material comprises the following steps of ball milling, mixing, hot pressing, sintering and crushing raw materials of the corundum-mullite composite material to obtain the corundum-mullite composite material. The preparation method of the zirconia-silicon carbide composite material comprises the following steps of ball milling, mixing, hot-pressing, sintering and crushing raw materials of the zirconia-silicon carbide composite material to obtain the zirconia-silicon carbide composite material. As a further technical scheme, the dispersing agent comprises polyacrylate. In the nickel-coated multilayer ceramic substrate, the dispersing agent comprises polyacrylate, and the dispersing performance of the polyacrylate can ensure that all raw materials can be uniformly dispersed in the processing process, so that the agglomeration phenomenon is reduced, the subsequent forming processing is facilitated, the production efficiency is improved, and the polyacrylate can be sodium polyacrylate, potassium polyacrylate and the like. As a further embodiment, the binder comprises a water-soluble polymer. In the nickel-coated multilayer ceramic substr