Electro static discharge protection for processing active matrix

Details Electro static discharge protection for processing active matrix Electro static discharge protection for processing active matrix

1993-04-29

1994-10-04

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 88, 359 54, G02F 11343

Patent

active

053531426

ABSTRACT:
An improved method for providing extended electro static discharge protection of an active matrix liquid crystal display, at the external lead contact areas by using a shorting conductor or bar to short out all row and column contacts or leads on the display, and to protect the electronics during active matrix processing, fabrication, polarizer attachment, and connecting of display leads. The display connection leads and the shorting bar on those leads, are on the front side of the active glass layer of the display. A saw is used to provide an accurate and relatively deep cut on the back side of the active glass layer thereby forming a border within the perimeter of the shorting bar on the front side of the active glass layer. The cut on the back side does not go through the active glass layer but stops several mils from the front side of the active glass layer. This method allows the shorting bar to remain intact with the display's external leads through all of the processing steps, including polarizer installation and the flex connector/driver connection, at least until active matrix liquid crystal display testing is ready to commence. After the polarizers are attached and external connections to the display contacts are made, the edge or border of the active glass layer, incorporating the shorting bar, is broken off at the cut.

REFERENCES:
patent: 5148299 (1992-09-01), Terada
patent: 5220443 (1993-06-01), Noguchi

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