Kd. Roth et C. Blasingbangert, ACTUAL PERFORMANCE DATA ON THE NEW PATTERN PLACEMENT METROLOGY TOOL LEITZ LMS-2020, Microelectronic engineering, 23(1-4), 1994, pp. 403-406
The new pattern placement metrology tool Leitz LMS 2020 is described a
nd the performance demonstrated. The short term repeatability measured
on a 13x13 grid is about 12 nm. The uncertainty of the tool is determ
ined to be within 25 mn. The tool is also well-suited for critical dim
ension (CD) monitoring purposes. The repeatability for CD measurements
is better than 10 nm.