Title :
Microflex: a new technique for hybrid integration for microsystems
Author :
Beutel, Hansjoerg ; Stieglitz, Thomas ; Meyer, Joerg Uwe
Author_Institution :
Dept. of Sensor Syst., Fraunhofer Inst. for Biomed. Eng., Stankt Ingbert, Germany
Abstract :
This paper describes a new interconnection wire method which allows versatile multiple strand connections between microsensors: sensor arrays and integrated circuits (IC). The interconnection method is termed Micro Flex Interconnects (MFI). One example for this technology is the connection of implantable, highly flexible neural micro devices to electronics for interfacing to the external world. The interconnection technique is based on a novel multilayer process using polyimide (Du Pont PI 2611). The thickness of the polyimide structure ranges from 5 to 15 μm including the insulation layers. Several metallization layers can be embedded in the material. This approach exhibits same advantages. The involved material is non-toxic and the ICs do not need any additional bond pad metallization. The MFI technique has been proven long-term stable. The metallization material can be chosen accordingly for electrodes, conducting lines, and connection pads. An commercial ball wedge bonder is the only equipment needed to perform the MFI method
Keywords :
integrated circuit interconnections; integrated circuit metallisation; integrated circuit testing; mechanical testing; microsensors; polymer films; 5 to 15 mum; Du Pont PI 2611; MFI; Micro Flex Interconnects; commercial ball wedge bonder; conducting lines; connection pads; hybrid integration; insulation layers; integrated circuits; interconnection; interconnection wire; metallization layers; metallization material; microsensors; microsystems; multilayer proces; multiple strand connections; neural micro devices; polyimide; sensor arrays; Bonding; Conducting materials; Inorganic materials; Integrated circuit interconnections; Metallization; Microsensors; Polyimides; Sensor arrays; Sensor phenomena and characterization; Wire;
Conference_Titel :
Micro Electro Mechanical Systems, 1998. MEMS 98. Proceedings., The Eleventh Annual International Workshop on
Conference_Location :
Heidelberg
Print_ISBN :
0-7803-4412-X
DOI :
10.1109/MEMSYS.1998.659773