发明授权
- 专利标题: Methods and systems for inspecting reticles using aerial imaging at off-stepper wavelengths
- 专利标题(中): 使用离散波长的空中成像检查标线的方法和系统
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申请号: US10679844申请日: 2003-10-06
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公开(公告)号: US07027143B1公开(公告)日: 2006-04-11
- 发明人: Stan Stokowski , David Alles
- 申请人: Stan Stokowski , David Alles
- 申请人地址: US CA Milpitas
- 专利权人: KLA-Tencor Technologies Corp.
- 当前专利权人: KLA-Tencor Technologies Corp.
- 当前专利权人地址: US CA Milpitas
- 代理机构: Daffer McDaniel, LLP
- 代理商 Ann Marie Mewherter
- 主分类号: G01N21/00
- IPC分类号: G01N21/00
摘要:
Methods and systems for inspecting a reticle are provided. A method may include forming an aerial image of the reticle with an inspection system at a wavelength different from a wavelength of an exposure system. The method may also include correcting the aerial image for differences between modulation transfer functions (MTF) of the inspection system and the exposure system. In this manner, the corrected aerial image may be substantially equivalent to an image of the reticle that would be printed onto a specimen by the exposure system at the wavelength of the exposure system. In addition, the method may include detecting defects on the reticle using the corrected aerial image. The detected defects may include approximately all of the defects that would be printed onto a specimen by the exposure system using the reticle.
信息查询