2008. 1. 24 1/1 semiconductor marking specification KDP621UL ulp-12 package revision no : 0 1. marking method laser marking 2. marking 2 1 0 a p1 no. item marking description device mark p1 KDP621UL * lot no. 0a 2007. 1st week [0:1st character, a:2nd character] note) * lot no. marking method ** : meaning (a=1, b=2, c=3, d=4, e=5, f=6, g=7, h=8, i=9, j=0) lot no. description remark 01, 02 ....51, 52 01 : 2006. 1st week, 02 : 2006. 2nd week 51 : 2006. 51th week, 52 : 2006. 52th week. rotation for 4 years : 01...52 : ...2006, 2010, 2014... 0a...5b : ...2007, 2011, 2015... j1...e2 : ...2008, 2012, 2016... ja...eb : ...2009, 2013, 2017... 0a, 0b ....5a, 5b** 0a : 2007. 1st week, 0b : 2007. 2nd week 5a : 2007. 51th week, 5b : 2007. 52th week. j1, j2 ....e1, e2** j1 : 2008. 1st week, j2 : 2008. 2nd week e1 : 2008. 51th week, e2 : 2008. 52th week. ja, jb ....ea, eb** ja : 2009. 1st week, jb : 2009. 2nd week ea : 2009. 51th week, eb : 2009. 52th week.
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