Patent ID: 8883523

Claim:
A method for detecting a pattern offset amount of exposed regions in the same layer, comprising: forming at least one pair of conductive detecting marks with a predetermined position relationship by a patterning process including two exposing processes; detecting an electrical characteristic of the at least one pair of conductive detecting marks, if the detected electrical characteristic does not meet a predetermined position relationship, it is determined that the pattern offset amount of the exposed regions in two exposure steps is not qualified; and if the detected electrical characteristic meets the predetermined position relationship, it is determined that the pattern offset amount of the exposed regions in two exposure steps is qualified, wherein the at least one pair of conductive detecting marks are used to detect the pattern offset amount of the exposed regions in the same layer, wherein the at least one pair of conductive detecting marks and the exposed regions whose pattern offset is to be detected are respectively formed simultaneously, wherein forming at least one pair of conductive detecting marks with a predetermined position relationship by a patterning process including two exposing processes comprises: sequentially forming a conductive thin film and a photoresist layer on a substrate; performing a first exposing process to a first region of the photoresist layer and a periphery region of the first region, a first photoresist exposed pattern corresponding to at least one first detecting mark is formed in the periphery region of the first region; performing a second exposing process to a second region of the photoresist layer and a periphery region of the second region, a second photoresist exposed pattern corresponding to at least one second detecting mark is formed in the periphery region of the second region, wherein the first photoresist exposed pattern for the first detecting mark and the second photoresist exposed pattern for the second detecting mark are correspondingly disposed in pair and are spaced a specified distance from each other and are not connected to each other; and developing the exposed photoresist layer on the substrate to obtain a photoresist mask, and then etching the conductive thin film using the photoresist mask and removing the photoresist mask, and thus the first and second detecting marks formed of the conductive thin film are obtained.