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US 5,315,101 AGranted
Method of manufacturing a large area active matrix array
AssigneeU.S. Philips Corporation
InventorsJohn R. Hughes, Martin J. Powell
Life of this patent
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AssigneeU.S. Philips Corporation
InventorsJohn R. Hughes, Martin J. Powell
Estimating the term…
A large area active matrix array (2) is manufactured by providing four substrates (1) each carrying a sub-array (21) having an active area (11) comprising a matrix of switching elements (30) and associated row and column conductors (41) and (42) for enabling addressing of individual switching elements (30). The row and column conductors (41) and (42) terminate in respective connecting leads (41a and 42a) extending beyond the active area (11). A portion (1a) of each substrate (1) and the connecting leads carried is removed so as to form a new substrate edge (1'a) adjacent each of two adjoining edges of the active area (11) and the substrates (1) are mounted onto a support (12) so that each new substrate edge is adjacent another new substrate edge (1'a) to form the large area array (2), thereby allowing the same pixel pitch to be maintained across the array (2). Each sub-array (2') may be fully tested before completion of the array (2) which should allow higher yields.
A method of manufacturing a large area active matrix array, which method comprises providing four substrates each carrying an active area comprising a matrix of switching elements arranged in rows extending between first and second edges of the active area and columns extending between third and fourth edges of the active area and means for accessing individual switching elements comprising a respective row conductor connecting the switching elements of each row and terminating in connecting leads extending beyond the first and second edges of the active area and a respective column conductor connecting the switching elements of each column and terminating in connecting leads extending beyond the third and fourth edges of the active area, removing a portion of each substrate and the connecting leads carried thereby so as to form a new substrate edge adjacent each of two adjoining edges of the active area and mounting the substrates onto a support so that each new substrate edge is adjacent another new substrate edge to form the large area array.
A large area active matrix array, which array comprises a support on which are mounted four substrates each carrying an active area comprising a matrix of switching elements arranged in rows extending between first and second edges of the active area and columns extending between third and fourth edges of the active area and means for accessing individual switching elements comprising a respective row conductor connecting the switching elements of each row and terminating in connecting leads extending beyond the active area and a respective column conductor connecting the switching elements of each column and terminating in connecting leads extending beyond the active area, a portion of each substrate and the connecting leads carried thereby having been removed so as to define a substrate edge adjacent each of two adjoining edges of the active area and the substrates being mounted to the support so that the substrate edges adjacent the two adjoining edges of the active area are adjacent one another to provide a large area array having the same pitch as each matrix.
Dependencies are inferred from the claim text.