Device manufacturing method and a calibration substrate
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 10, 2009
Grant Date -
Dec 28, 2006
app pub date -
Jun 28, 2005
filing date -
Jun 28, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a device manufacturing method wherein a plurality of front side marks are manufactured on the front side of the substrate. These marks are used to locally align the substrate when exposing. After certain processing steps, the positions of the front side marks are measured and compared with respect to their original positions. The measured position changes of the front side marks, i.e. their behaviour, can then be analyzed. The original positions and actual positions are defined with respect to a nominal grid which is defined using global alignment marks which are positioned at the back side of the substrate. Because the global alignment marks are positioned at the back side, they are not affected by any processing step.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully