{{tag>collection_mcmaster vendor_micrel type_wafer type_unknown year_2005 foundry_unknown tech_unknown}}

This was a merge of two duplicate pages, messy...


====== Source ======

eBay seller mlsolar


====== Wafer ======

{{:mcmaster:micrel:6-2807a_8a31099_13:overview.jpg?300}}

Misc markings:

Small lettering on the lower left:
  OK21.0B0
Large lettering bottom:
  6-2807A 8A31099 13


====== Die ======

{{:mcmaster:micrel:6-2807a_8a31099_13:die_edge_mit20x.jpg?300}}

===== Label =====

  (M)
  2005
  28079-NN
  MICREL


===== Map =====

[[http://siliconpr0n.org/map/micrel/6-2807a-8a31099-13/mcmaster_die_mit20x_nolev/|Die @ Mit20x]]
  * [[http://siliconpr0n.org/map/micrel/6-2807a-8a31099-13/single/micrel_6-2807a-8a31099-13_mcmaster_die_mit20x_nolev.jpg|Single]] (5210x6511, 13MB)


====== Test pattern ======

===== Label =====
    
  TCC051
  TMC05A
  HRES
  09X0.5
  15X.45


===== Map =====

[[http://siliconpr0n.org/map/micrel/6-2807a-8a31099-13/mcmaster_test_mit20x_nolev/|Test pattern @ Mit20x]]
  * [[http://siliconpr0n.org/map/micrel/6-2807a-8a31099-13/single/micrel_6-2807a-8a31099-13_mcmaster_test_mit20x_nolev.jpg|Single]] (2875x2419, 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?

{{:mcmaster:micrel:6-2807a_8a31099_13:test2_0_mit20x.jpg?300}}
{{:mcmaster:micrel:6-2807a_8a31099_13:test2_1_mit20x.jpg?300}}
{{:mcmaster:micrel:6-2807a_8a31099_13:test2_2_mit20x.jpg?300}}
{{:mcmaster:micrel:6-2807a_8a31099_13:test2_3_mit20x.jpg?300}}
{{:mcmaster:micrel:6-2807a_8a31099_13:test2_4_mit20x.jpg?300}}