(19)

(11)

EP 2 153 465 A1

(12)

(43) Date of publication: 17.02.2010 Bulletin 2010/07 (21) Application number: 07784074.2 (22) Date of filing: 23.05.2007

(51) International Patent Classification (IPC):  H01L 23/48(2006.01) (86) International application number: PCT/US2007/069553 (87) International publication number: WO 2008/143675 (27.11.2008 Gazette 2008/48)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (71) Applicant: Texas Instruments Incorporated Dallas, Texas 75265-5474 (US)	(72) Inventors: WACHTLER, Kurt, P. Richardson, TX 75081 (US) CASTRO, Abram, M. Fort Worth, TX 76103 (US) GERBER, Mark, A. Lucas, TX 75002 (US) (74) Representative: Holt, Michael  Texas Instruments Limited European Patents Department 800 Pavilion Drive Northampton Business Park Northampton NN4 7YL 800 Pavilion Drive Northampton Business Park Northampton NN4 7YL (GB)