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zt970831(½ð±Ò+2,VIP+0):¸ÐлÄúµÄ½»Á÷ 8-21 18:16
it seems difficult as the other part of the top surface has been passivated. However, you can use four the nearest chips to measure the contact resistance between the electrode and top layer of your LED chip (which is of N-type from your intro).
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