Table of Contents
This was a merge of two duplicate pages, messy…
Source
eBay seller mlsolar
Wafer
Misc markings:
Small lettering on the lower left:
OK21.0B0
Large lettering bottom:
6-2807A 8A31099 13
Die
Label
(M) 2005 28079-NN MICREL
Map
- Single (5210×6511, 13MB)
Test pattern
Label
TCC051 TMC05A HRES 09X0.5 15X.45
Map
- Single (2875×2419, 3.7MB)
Large test pattern
Looks a lot like GCA Autostep 200 INSITU alignment marks: http://www.cnf.cornell.edu/cnf_process_photo_step_align.html
Downloadable GDS of the alignment patterns are at http://ssel-sched.eecs.umich.edu/wiki/GetFile.aspx?Page=Public.GCA%20AS200%20AutoStep&File=GCA%20Alignment%20Marks.zip.
Not quite identical, though - the AS200 has ten lines in each set and this one looks more like 15. The AS200 pattern also omits the central cross. Perhaps another GCA stepper with a slightly different firmware version?
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