High-frequency and high-Q-value chip multilayer ceramic capacitor
A technology of multilayer ceramics and capacitors, applied in the direction of multilayer capacitors, capacitors, variable capacitors, etc., can solve the problems of high production cost, easy oxidation of copper electrodes, difficult to guarantee product performance and qualification rate, etc., to reduce production costs. , the effect of improving operability
Active Publication Date: 2012-07-18
GUANGDONG FENGHUA ADVANCED TECH HLDG
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Problems solved by technology
At present, the production of high-Q and high-frequency chip multilayer ceramic capacitors MLCC at home and abroad is mainly realized by two material systems: one uses noble metal Ag / Pd or all-Pd material as the inner electrode, the terminal electrode is all Ag, and all-palladium material The sintering temperature is quite high, and the sintering temperature is 1300-1360°C, which will inevitably lead to the problem of high production cost
Another system uses metal copper as the internal electrode material system. The copper electrode is easy to oxidize, and it is difficult to control the production. It is difficult to guarantee the product performance and pass rate, which will inevitably lead to the problem of high production cost.
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[0010] The gist of the present invention is based on the original production of base metal nickel high-frequency multilayer ceramic dielectric capacitors, combined with years of MLCC development and design technology, through the selection of ceramic powder materials, special design of MLCC structure, selection of matching internal electrode paste, Matching selection of terminal electrode paste, process development of terminal electrode sintering, etc. The production of a high-frequency high-Q chip multilayer ceramic capacitor is realized, and the invention reduces the sintering temperature, reduces the production cost, and improves the operability of the production process. The content of the present invention will be further described below in conjunction with the examples. The content mentioned in the examples does not limit the present invention. The selection of process conditions such as slurry preparation, overprinting, firing, firing, and electroplating in the preparati...
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The invention discloses a high-frequency and high-Q-value chip multilayer ceramic capacitor. The capacitor is prepared by the steps of preparing ceramic paste, preparing a medium membrane, overprinting, drying a compact, laminating, cutting, discharging an adhesive, firing, chamfering, sealing an end, sintering the end, electroplating and the like, wherein an inner electrode is made of nickel (Ni) during the overprinting of the inner electrode and a medium layer; an end electrode is made of copper (Cu) during the end sealing; the used ceramic material is a zirconium-titanium-strontium-calcium(Ca-Sr-Ti-Zr) series ceramic material during the preparation of the ceramic paste; the Ca-Sr-Ti-Zr series ceramic material is spheres or approximately spherical bodies with average particle size of 0.3 to 0.5 mu m; and the inner electrode is arranged by using inverted overprinting during the overprinting of the inner electrode and the medium layer. The prepared chip multilayer ceramic capacitor has superior high-frequency and high-Q-value performance and can greatly reduce the production cost.
Description
technical field [0001] The invention relates to a chip type multilayer ceramic capacitor with high frequency and high Q value. Background technique [0002] Chip multilayer ceramic capacitor MLCC is a new type of electronic component, which is widely used in the surface mount of consumer electronics such as communications, computers, and household appliances. With the rapid development of global surface mount technology, the output of surface mount components is rising rapidly, and the demand for MLCC is also rising. At present, the production of high-Q and high-frequency chip multilayer ceramic capacitors MLCC at home and abroad is mainly realized by two material systems: one uses noble metal Ag / Pd or all-Pd material as the inner electrode, the terminal electrode is all Ag, and all-palladium material The sintering temperature is quite high, and the sintering temperature is 1300-1360°C, which will inevitably lead to the problem of high production cost. Another system uses ...
Claims
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IPC IPC(8): H01G4/30H01G4/005H01G4/12H01G4/228
CPCH01G4/12H01G5/011
Inventor 安可荣陈长云李筱瑜黄旭业刘新孙小云彭自冲许芳球祝忠勇唐浩张尹卢艺森
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG