摘要
从阳极尺寸和结构设计、阴极被膜工艺改进,分析固体钽电容器的等效串联电阻(ESR)值的影响因素,提出了制造高频、低ESR值固体钽电解电容器的新工艺。投入10V/100μF、10V/470μF两种规格产品,结果表明:阳极块厚度控制在1.5～2.1mm时,同一规格产品具有最小体积,接触电阻r金更小;在硝酸锰溶液中添加强氧化剂和表面活性剂,制得的MnO2层的r解更低;同时采用多芯并联结构,能使固体钽电解电容器的ESR值降低到通用钽电容器的ESR值的1/3～1/2,且100kHz时电容量变化值小于20%。
The factors affecting the ESR value of solid tantalum capacitor are analyzed through improving the anode＇s dimension ＆ structure design and cathode coating process, The new process for fabricating high frequency and low ESR solid tantalum electrolytic capacitor is developed. Two spec products of 10V/100μF and 10V/470μF are produced by the new process, and the electric test result shows that there are the smallest volume and lower metal contacting resistance for the same style when the thickness of anode is controlled between 1.5 -2. 1 mm; adding strong oxidant and surfactant into Mn（NO3）2 solution, the electrolyte（MnO2） resistance becomes more low; at the same time, multi-anode in parallel can decrease the ESR of solid tantalum electrolytic capacitor to 1/3 -1/2 ESR value of general tantalum capacitor, and the capacitance tolerance at 100kHz is less than 20%.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2008年第4期135-137,140,共4页
Materials Reports
基金
国家火炬计划项目(编号:2003EB011423)
关键词
高频
低等效串联电阻
多芯并联
钽电解电容器
high frequency, low equivalent series resistance（ESR）, multi-anode in parallel, Ta electrolytic capacitor
