杨烨 许国栋

摘要：针对车载触控器件的静电击穿现象进行原因分析，并系统实施隔离这一静电防护方法，有效降低了產品在生产制造过程中发生静电击穿的比例，进而提高了产品的良率，以节约生产制造成本。通过对车载触控器件进行结构分析，将触控器件发生静电击穿的典型区域分为视窗区桥点、触控芯片及按键区走线。结合生产制造过程静电产生与击穿机理，以及贴膜、贴合过程触控器件的状态分析，得出需要对3个典型区域分别采取流程调整，增加高阻隔离层及高阻耗散胶皮等不同措施。通过引入高阻耗散隔离层的防静电方法，将发生静电击穿的比例分别降低了5.6%、0.11%以及7.75%。这一结果说明，在生产过程中，需要着重处理各个高阻耗散隔离细节，才能真正地降低，抑制和预防静电击穿的发生。

关键词：触控器件;静电击穿;高阻;耗散;隔离层

中图分类号：TN402             文献标志码：A        文章编号：1009-9492（2021）12-0054-04

Discussion on Electrostatic Protection of High-precision Thin-film VehicleNavigation Touch Device during the Manufacturing Process

Yang Ye1，Xu Guodong2

（1. Guangdong Shantou Goworld Electronics Co.， Ltd.， Shantou， Guangdong 515065， China;

2. Shantou Goworld Display Technology Co.， Ltd.， Shantou， Guangdong 515065， China）

Abstract： The reasons for the electrostatic breakdown of vehicle touch devices were analyzed. Then the isolation method for electrostatic protection was systematically applied to effectively control the electrostatic breakdown and thus improve the yield of touch devices to save manufacturing costs. The breakdown phenomena were divided into the bridge point in view areas， the chip of touch and keypads by analyzing the structure of on-board touch devices. Combined with the static electricity generation and breakdown mechanism in the production process and the state analysis of touch devices in the film coating and bonding process， it was concluded that different measures such as process adjustment， adding high resistance isolation layer and high resistance dissipation rubber need to be taken for the three typical areas. The percentage of electrostatic breakdown in these three regionswere reduced respectively by 5.6%， 0.11% and 7.75%. The result indicates that， in order to effectively control the electrostatic breakdown，  should pay attention to each detail for high-resistance dissipation isolation during the whole manufacturing processes.

Key words： touch device; electrostatic breakdown; high resistance; dissipation; isolating course

0 引言

高精密薄膜电路触控器件在各个领域的应用越来越广泛，凭借人机交互提供更流畅准确的触控体验，正逐渐往汽车电子领域渗透发展，并将成为车载触控器件应用的主流技术，产品应用的环境异常严苛，需具备长期应用的可靠性及高度稳定性。常见触控器件分为电阻式触控器件和电容式触控器件两种[1]。车载触控器件按照不同结构，主要分为内嵌式和外挂式，目前市场主流为外挂式车载触控器件。而静电作为一种常见的自然现象，具有特定的规律，既有有利的方面，也存在严重的危害[2]。……