发明名称 |
METHOD AND APPARATUS FOR SIMULTANEOUSLY MEASURING OVERLAY REGISTRATION ERROR FOR MORE THAN TWO SEMICONDUCTOR WAFER LAYERS |
摘要 |
PURPOSE: A method and an apparatus are provided to improve the technique for simultaneously measuring a registration error for overlaying semiconductor layers. CONSTITUTION: At least first, second, and third layers are formed on top of another. A first pattern is provided at a prescribed position of the first layer. A second pattern is provided at a prescribed position of the second layer and has a specific shape and a specific size and further has at least one discontinuous part formed at a predetermined position. A third pattern is provided at a prescribed position of the third layer and has a specific shape and the specific size of the second pattern, and further has at least one discontinuous part formed at its predetermined position; and the respective parts of the second and third patterns match with at least one discontinuous part of the other, when the second and third layers are registered. |
申请公布号 |
KR20020016586(A) |
申请公布日期 |
2002.03.04 |
申请号 |
KR20010051361 |
申请日期 |
2001.08.24 |
申请人 |
SCHLUMBERGER TECHNOLOGIES, INC. |
发明人 |
KNUTRUD PAUL C. |
分类号 |
G03F7/22;G03F7/20;H01L21/027;H01L21/66;H01L23/544;(IPC1-7):H01L21/66 |
主分类号 |
G03F7/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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