Thin film flexible circuits with embedded ASICs–Enabling technology for sophisticated medical applications

A. Kaiser, P. Matej, K. Hanka, M. Abel, C. Herbort, R. Lang, O. Pursche, K. Ruess, U. Keim
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Abstract

The requirements for thin film substrates have increased over the last years, as new materials, ongoing miniaturization and higher connectivity and complexity of circuit designs are arising. Especially the medical field, with its various application areas, drives the development of new technologies and new material combinations. Specifically, components for catheter or endoscope equipment are often difficult to realize, as limited space/cross section compete with the demand for higher functionality in the tip, and thus, requiring a higher number of connections to be routed out. One possibility to overcome this problem, is a local digitalization of the signals of the various sensors in the tip and doing a serial data transmission to the outside, reducing the required number of leads. To maintain a very small form factor, we have developed a technology that allows the direct integration of thinned ASIC chips into thin film flexible circuits. An example application, for the readout of catheter shape and positioning, was realized. Our contribution will give an overview of the target application and describe the integration technology for the thinned dies together with the build-up of the thin film flexible circuits.
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薄膜柔性电路与嵌入式asic使能技术,用于复杂的医疗应用
在过去的几年里,随着新材料的出现,对薄膜衬底的要求越来越高,不断小型化,电路设计的连接性和复杂性也越来越高。特别是医疗领域,以其多样化的应用领域,带动了新技术和新材料组合的发展。具体来说,导管或内窥镜设备的组件通常难以实现,因为有限的空间/横截面与尖端更高功能的需求相竞争,因此需要更多数量的连接。克服这个问题的一种可能性是对尖端的各种传感器的信号进行局部数字化,并将串行数据传输到外部,从而减少所需的引线数量。为了保持非常小的外形,我们开发了一种技术,可以将薄的ASIC芯片直接集成到薄膜柔性电路中。实现了导管形状和定位读数的实例应用。我们的贡献将对目标应用进行概述,并描述薄晶片的集成技术以及薄膜柔性电路的构建。
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