To understand this text there are some prerequisites. A basic foundation in
lithography science is assumed. The SPIE Handbook on Microlithography,
Micromachining and Microfabrication. Volume 1: Microlithography l provides
a suitable introduction. It is also assumed that the reader has had some
introduction to basic statistical concepts and statistical process control. It is my
intention that this text be a self-contained tutorial on lithography process
control for readers familiar with the prerequisite lithography science and basic
statistical process control, although some subjects may involve a higher level of
mathematical sophistication than others. The text covers the subject of
lithography process control at several levels. Discussions of some very basic
elements of statistical process control and lithography science are included,
because, when trying to control a lithography process, a number of subtle
problems arise that are related to fundamental issues. To most readers, the
information presented on the foundations of statistical process control should be
familiar. Nevertheless, it is useful to review the foundations of statistical
process control, in order to clearly identify those circumstances in which the
method may be applied, and where it needs to be applied with particular care.
This inclusion of basic topics also allows the text to serve as an introduction to
process control for the novice lithography engineer and as a reference for
experienced engineers. More advanced topics are also included to varying
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