semiconductor KTC9018S 2005.10. 1. 1/1 marking specification sot-23 package revision no : 0 1. marking method laser marking 2. marking bgf 2 0 1 1 no. item marking description device mark bg KTC9018S hfe grade f f, g, h, i * lot no. 01 2002. 1st week [0:1st character, 1:2nd character] note) * lot no. marking method character arrangement 1 st character 1 (a) 2 (b) 3 (c) 4 (d) 5 (e) 6 (f) 7 (g) 8 (h) 9 (i) 0 (j) 2nd character a (1) b (2) c (3) d (4) e (5) f (6) g (7) h (8) i (9) j (0) year marking (week) periode (year) remark 1 st year (2002) 01 02 51 52 2002-2006-2010... rotation for 4 years 2 nd year (2003) 0a 0b 5a 5b 2003-2007-2011... 3 rd year (2004) j1 j2 e1 e2 2004-2008-2012... 4 th year (2005) ja jb ea eb 2005-2009-2013...
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