Patent ID: 8384407
Filing Date: 2013-02-26
Classification: G01R,G09G,H01L,H05K

Abstract:
1. A test pad structure, comprising: a plurality of test pads sequentially arranged from a wiring pattern on a substrate and arranged in rows parallel with one another, the plurality of test pads including a first group of test pads having at least one pad arranged in a first row and two pads arranged in rows parallel with the first row, and a second group of test pads having at least two first pads, at least two second pads and at least two third pads, the at least two first pads arranged in a second row parallel with the first row, the at least two second pads arranged in a third row parallel with the first row and the at least two third pads arranged in a fourth row parallel with the first row; and a plurality of connection leads extending from end portions of the wiring pattern to be connected to the plurality of test pads, the plurality of the connection leads including a first group of connection leads connected to the first group of the test pads and a second group of connection leads having first leads, second leads, and third leads, the first leads connected to the at least two first pads, one of the second leads passing between the at least two first pads to be connected to at least one of the at least two second pads, and one of the third leads passing between the at least two first pads to be connected to one of the at least two third pads, the one of the second leads being connected to at least one pad of the at least two second pads arranged in the third row next to the second row, wherein the at least two first pads arranged in the second row are spaced apart from each other by a space required for the one of the second leads, and wherein outer edges of the at least one pad arranged in the first row and the at least two first pads arranged in the second row are contained within outer edges of the at least two second pads arranged in the third row.