Active matrix ESD protection and testing scheme
AssigneeHyundai Electronics America
InventorScott H. Holmberg
Life of this patent
Estimating the term…
Abstract
An improved method of manufacturing active matrix displays with ESD protection through final assembly and in process testing and repair capabilities. At least a first set of shorting bars is formed adjacent the row and column matrix. The shorting bars are respectively coupled to one another in series to allow testing of the matrix elements. A first shorting bar is coupled to the row lines and a second shorting bar is coupled to the column lines. The shorting bars can remain coupled to the matrix through final assembly to provide ESD protection and final assembly and testing capability.
Claims47
A method of manufacturing active matrix displays comprising a plurality of thin film transistors, each transistor couple a pixel to a row line and a column line in the matrix displays, said method comprising:
- forming at least a first set of inner shorting bars, each having a first resistance adjacent to the display matrix on a first substrate, coupling in parallel a first one of said shorting bars to all the row lines and coupling in parallel a second one of said shorting bars to all the column lies;
- and
- coupling said shorting bars to one another by a resistor having a magnitude about one hundred times greater tan the first resistance.
A method of manufacturing active matrix displays comprising a plurality of thin film transistors, each transistor coupling a pixel to a row line in the matrix displays, said method comprising:
- forming at least a first set of inner shorting bars adjacent to the display matrix on a first substrate, each shorting bar having a first resistance;
- coupling in parallel, a first one of said shorting bars to all the row lines;
- forming row driver contact pads adjacent said display matrix on a side opposite said first one of said shorting bars;
- coupling in parallel, a second one of said shorting bars to all the column lines;
- forming column driver contact pads adjacent said display matrix on a side opposite said second one of said shorting bars;
- and
- coupling said shorting bars to one another by a resistor having a magnitude about one hundred times greater than the first resistance.
A method of manufacturing active matrix displays comprising a plurality of thin film transistors, each transistor coupling a pixel to a row line in the matrix displays, said method comprising:
- forming at least a first set of finer shorting bars adjacent to the display matrix on a first substrate, each shorting bar having a first resistance;
- coupling in parallel, a first one of said shorting bars to all the row lines;
- forming row driver contact pads adjacent said display matrix on a side adjacent said first shorting bar;
- coupling in parallel, a second one of said shorting bars to all the column lines;
- forming column driver contact pads adjacent said display matrix on a side adjacent said second shorting bar;
- and
- coupling said shorting bars to one another by a resistor having a magnitude about one hundred times greater than the first resistance.
Dependencies are inferred from the claim text.