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    • 25. 发明授权
    • System, method, and medium for an endpoint detection scheme for copper low-dielectric damascene structures for improved dielectric and copper loss
    • 用于铜低介电镶嵌结构的端点检测方案的系统,方法和介质,用于改善电介质和铜损耗
    • US07848839B2
    • 2010-12-07
    • US12004730
    • 2007-12-21
    • Ajoy ZutshiRahul SuranaGirish Dixit
    • Ajoy ZutshiRahul SuranaGirish Dixit
    • G06F19/00G05B15/00
    • B24B37/013B24B49/12G01N21/55H01L22/26
    • A system, method and medium of detecting a transition interface between a first dielectric material and an adjacent second dielectric material in a semiconductor wafer during a chemical-mechanical polishing process includes impinging an incident light of a predetermined wavelength on the semiconductor wafer at a first time, detecting at least one first intensity of at least one first reflected light, impinging the incident light of the predetermined wavelength on the semiconductor wafer at a second time, detecting at least one second intensity of at least one second reflected light, and determining a difference between the at least one first intensity and the at least one second intensity. If the difference between the at least one first intensity and the at least one second intensity is above a predetermined threshold, the chemical-mechanical polishing process is terminated.
    • 在化学机械抛光工艺期间检测半导体晶片中的第一介电材料和相邻的第二介电材料之间的过渡界面的系统,方法和介质包括在第一时间在半导体晶片上入射预定波长的入射光 检测至少一个第一强度的至少一个第一反射光,在第二时间将预定波长的入射光照射在半导体晶片上,检测至少一个第二强度的至少一个第二反射光,并确定差异 在所述至少一个第一强度和所述至少一个第二强度之间。 如果所述至少一个第一强度和所述至少一个第二强度之间的差异高于预定阈值,则终止所述化学机械抛光处理。