FPCを接着したアルミニウム積層板の熱変形解析 (第1報)

計測との比較による計算法の確立

抄録

Analysis of thermal deformation on an aluminum laminated plate fixed to a flexible printed circuit (FPC) by adhesive leads to the development of a head-arm for a magnetic disk storage system. This work examines the establishment of a simple method for calculating thermal deformation. The efficacy of the composite beam method is investigated by comparing a measurement made by holographic interferometry and two calculations made by a finite element method, with the composite beam method. This research confirms the reliability of the calculation method using the equivalent characteristics of a simplified FPC. When the shearing deformation of an adhesive is neglected, the thermal deformation of an aluminum laminated plate can be easily calculated by using the composite beam method. When the Young's modulus of the FPC is small and the adhesive is thick, thermal deformation cannot be calculated using the composite beam method because of shearing deformation of the adhesive. It is possible to simplify the complicated shape of an FPC using the above two calculation methods.