Patent ID: 8957692
Filing Date: 2015-02-17
Classification: G01R,G11B,H01S

Abstract:
1. A method for performing a burn-in test on an object under test in which a plurality of electrodes are provided in positions at different heights, the method comprising steps of: preparing an object under test in which an electrode in a higher position have a higher surface roughness among the plurality of electrodes; bringing a plurality of sheet-type probes into contact with the plurality of electrodes, respectively; and supplying an electric current with the plurality of electrodes through the plurality of sheet-type probes, wherein the object under test includes a plurality of units provided on a wafer or a bar, each of the units including: an element having a predetermined height; and a lower electrode electrically connected to a lower surface of the element, and wherein the object under test is prepared in such a manner that a surface roughness of an upper electrode on the upper surface of the element is higher than a surface roughness of the lower electrode.