Model for ESD LCD upset of a portable product

A hybrid method is developed to model Electro-Static Discharge (ESD) LCD (Liquid Crystal Display) upset in a portable product. It combines ESD scanning, full-wave simulation and circuit simulation. This methodology is applied in the investigation of system-level ESD problem of the LCD of the portable product by the following steps. First, the sensitive area of the portable product causing the failure is located by ESD scanning. Using the local injection measurement currents, a behavioural SPICE model is then developed to simulate the ESD failure. Third, a full wave block-level model is used to extract the current densities at the sensitive regions; those current densities are imported into the SPICE model to predict ESD upset levels. The combined model is verified by testing its ability to simulate the upset level of four system level ESD test conditions, leading to satisfactory results.

[1]  F.Y. Tsai,et al.  Board Level ESD of Driver ICS on LCD Panels , 2007, 2007 IEEE International Reliability Physics Symposium Proceedings. 45th Annual.

[2]  Francescaromana Maradei,et al.  Circuital and numerical modeling of electrostatic discharge generators , 2005 .

[3]  David Pommerenke,et al.  Numerical modeling of electrostatic discharge generators , 2003 .

[4]  Ian D. Pavey,et al.  ESD simulation and cure: a case study , 1995 .

[5]  Kai Wang,et al.  A novel method for the analysis of ESD generators and coupling using frequency domain , 2006, 2006 IEEE International Symposium on Electromagnetic Compatibility, 2006. EMC 2006..

[6]  Ming-Dou Ker,et al.  The impact of low-holding-voltage issue in high-voltage CMOS technology and the design of latchup-free power-rail ESD clamp circuit for LCD driver ICs , 2005 .

[7]  Tai-Ho Wang,et al.  On-Chip system ESD protection design for STN LCD drivers , 2005, 2005 Electrical Overstress/Electrostatic Discharge Symposium.

[8]  Kai Wang,et al.  Susceptibility Scanning as a Failure Analysis Tool for System-Level Electrostatic Discharge (ESD) Problems , 2008, IEEE Transactions on Electromagnetic Compatibility.

[9]  Michel Mardiguian,et al.  Electrostatic Discharge: Understand, Simulate and Fix ESD Problems , 1986 .

[10]  M.-D. Ker,et al.  Board-Level ESD of Driver ICs on LCD Panel , 2009, IEEE Transactions on Device and Materials Reliability.