Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yao-Yuan Chang0
Date of Patent
January 22, 2019
0Patent Application Number
154717710
Date Filed
March 28, 2017
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An asymmetric stair structure includes multiple unit layers and has m regions (m≥2). In each of the m regions, a different part of unit layers having an interval of m unit layers each have a portion not covered by an upper adjacent unit layer, so that a stair having a step difference of m unit layers is formed. In arbitrary two of the m regions, the two different parts of unit layers include no repeated unit layers.
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