Patent ID: 8420945

Claim:
A package substrate comprising: an insulating substrate; first circuit patterns arranged on the insulating substrate; second circuit patterns arranged on the insulating substrate, the second circuit patterns and the first circuit patterns being alternately arranged in a first row and a second row; a test pattern electrically connected between same polar terminals of the first circuit patterns and the second circuit patterns, wherein each of the first circuit patterns comprises a first anode terminal extending in a first direction and a first cathode terminal, each of the second circuit patterns comprises a second anode terminal extending in a second direction substantially opposite to the first direction and a second cathode terminal, and the test pattern comprises an anode test line electrically connected between the first anode terminal and the second anode terminal, and the anode test line comprises: a main anode line extending in the first direction, a first auxiliary anode line extending from the main anode line, the first auxiliary anode line electrically connected with the first anode terminal of each of the first circuit patterns and the second anode terminal of each of the second circuit patterns in the first row, and a second auxiliary anode line extending from the main anode line, the second auxiliary anode line electrically connected together with the first and second anode terminals of the first and second circuit patterns adjacent to each other in the second row.