Simulation Study On Flexible And Stretchable Interconnection Structure

To meet the development requirements of Internet of Things and biological medical technology, the electronic products should not only have excellent human applicability and portable, but also have other characteristics such as shape-variable. The traditional flexible interconnection can only meet the requirements of flexible, not malleable. Hence, the stretchable and flexible interconnection technology based on inorganic electronic material is suitable for the electronic products. The stretchable and flexible interconnection, not only has the high performance and high reliability of traditional inorganic electronic, but also has the characteristics of excellent scalability and flexibility.In view of its many advantages, research on its various characteristics is meaningful and very necessary. At present, the study of malleable flexible interconnection mainly concentrated on the manufacturing process and increasing the ductility and the study of its electrical properties is just experimental result of a simple circuit. There are few researches on how its high frequency characteristic and the extending deformation of expansive flexibility influence its electrical performance. This paper made a simulation analysis on the serpentine interconnection structure which is a typical structure in the stretchable and flexible interconnection. The specific research contents are as follows:1. First of all, the traditional interconnection, flexible interconnect, extended flexible interconnect structure and process are introduced in this paper, then using ANSYS software to model the serpentine interconnection structure. After dealing with the tensile deformation, obtained the different tensile displacement models.2. The parasitic parameters of the deformation models are extracted by Q3 D Extractor. The parameters of DC resistance/DC inductance, AC resistance/AC inductance and coupling capacitance are simulated respectively. Based on the study of the changing relation between frequency, the extending process of deformation and above parameters, analyzed the influence of wire spacing of coupling inductance and coupling capacitance.3. After extracting the S parameters of deformation model by using HFSS, the study of return loss and insertion loss in the serpentine interconnection structure on the simulation with the change of deformation displacement and frequency. Based on the case of U, V, and serpentine interconnection structure, this paper study the influence of interconnection line shape to the return loss and insertion loss. Besides, the coupling of serpentine interconnection structure near end crosstalk and far end crosstalk is also simulated, and obtained the near end crosstalk and far end crosstalk relationship along with the change of signal frequency under the conditions of different deformation and wire spacing.4. Import the S parameter model generated by HFSS to Ansoft Designer, time domain simulation of the coupling serpentine interconnection structure is analyzed. In these two kind of typical cases, 1 GHz and 10 GHz signal frequency, the incident port reflection and coupling transmission performance of serpentine interconnection structure is studied. In addition, it also studies and analyzes the influence of tensile deformation on the characteristic of the time-domain, and the results are compared and summarized in the end.This paper made a simulation on electric parameters of the serpentine interconnection structure, studied how its electrical properties changing with frequency.Then analyzed how the extending deformation affected the electrical parameter. And a validation method system of the electrical properties of stretchable and flexible interconnection was initially formed, which provides an important support to the theory of equivalent circuit model of flexible and stretchable interconnection and has a guiding significance for the design and manufacture of flexible interconnection.