Patent ID: 6218201
Filing Date: 2001-04-17
Classification: G01R,G02F,G09G

Abstract:
In a method of manufacturing an electronic display module comprising at least one substrate having a surface with a plurality of interconnections thereon for controlling the module, in which method an IC is placed on the surface of the substrate, which IC has plurality of external connections that are brought into contact with the interconnections on the surface during placement of the IC, the IC being operative, in a display driver mode, for producing control signals at the interconnections for operating the module to create a display, the improvement wherein, after the placement, the IC is operated in a self-test mode for producing test signals at distinct first interconnections, which test signals, after having followed a distinct route, are received at distinct second interconnections, the delay of a received signal being compared within the IC with a predetermined delay,whereby the delay of the received signal at said second interconnections is a quality measure for contact resistances between the interconnections on the substrate and the external connections of the IC.