面向方案设计的BME MLCC宇航鉴定关键技术

Key technology on space qualification of BME multilayer ceramic capacitors for conceptual design

近年来,随着技术逐渐成熟,在欧美等国,BME MLCC已经逐渐进入宇航应用领域。相对传统的PME MLCC,BM E M LCC具有缓慢老化失效模式、介质减薄等特性,也存在可靠性风险。从"初步评估、详细评估、鉴定检验"宇航鉴定思路出发,结合电容器失效模式和失效机理,分析AEC-Q200、MIL-PRF-32535、NASA S-311-P-838等标准试验项目,对比PME MLCC与BME MLCC通用规范要求。在鉴定范围和材料结构要求、结构分析和生产一致性、长寿命可靠性、环境适应性等方面,提出了面向方案设计的BME MLCC宇航鉴定关键技术。

With the gradual maturity of technology,base metal electrode multilayer ceramic capacitor(BME MLCC)has gradually entered the field of aerospace applications in Europe and America recently.BME MLCC has the characteristics of slow aging and ceramic membrane thinning and reliability risk on the other hand.Based on the thinking of“preliminary evaluation,detailed evaluation,and identification test”,failure mechanism and failure mode of the capacitor,the standards such as AEC-Q200,MILPRF-32535 and NASA S-311-P-838 were analyzed,and general standard for BME MLCC was compared with PME MLCC standards.The key technologies on space qualification of BME multilayer ceramic capacitors for conceptual design were put forward in terms of identification range and material structure requirements,construction analysis and production consistency,long life reliability and environmental adaptability.