化学沉积电极与BaTiO_3系PTCR半导瓷的欧姆接触  

Ohmic Contact of Electroless Ni and Cu Electrodes to BaTiO_3-based PTCR Semiconductive Ceramics

作　　者：张道礼[1] 周东祥[1] 姜胜林[1] 汪小红[1] 龚树萍[1] 

机构地区：[1]华中科技大学光电子与信息工程学院电子科学与技术系,武汉430074

出　　处：《压电与声光》2002年第1期26-30,共5页Piezoelectrics & Acoustooptics

基　　金：国家"八六三"计划 (715 -0 0 6-0 0 70 );湖北省重点科技计划资助项目 (992 P0 3 2 6)

摘　　要：研究了在 Ba Ti O3系 PTCR半导体陶瓷上化学沉积镍和铜电极的接触电阻及稳定性 ,并与烧渗 Ag-Zn、烧渗 Al电极进行了比较。根据实验结果 ,用量子力学从理论上讨论了欧姆接触的可能模型 ,提出场发射是金属-半导体陶瓷形成欧姆接触的机理之一。陶瓷表面经过处理后 ,元件的电性能要发生一些变化 。This paper presents that contact resistance and stability of electroless Ni and Cu electrodes on BaTiO 3 based PTCR semiconductive ceramics,and the experimental results were compared with those of the fired Ag Zn and Al electrodes on the above ceramics.Based on the experimental results,the possible model was discussed in theory and the field emission was considered to result in ohmic contact of electroless Ni and Cu electrodes to BaTiO 3 based PTCR semiconductor ceramics.The surfaces treatment of PTCR ceramics resulted in the changes of electrical properties of thermistor components,but could not affect bulk properties of ceramics.

关 键 词：PTCR半导体陶瓷 化学沉积镍 化学沉积铜 欧姆接触 场发射 钛酸钡系 化学沉积电极 

分 类 号：TN304.82[电子电信—物理电子学] O472[理学—半导体物理]