(19)

(11)

EP 1 303 864 A1

(12)

(43) Date of publication: 23.04.2003 Bulletin 2003/17 (21) Application number: 01939321.4 (22) Date of filing: 22.05.2001

(51) International Patent Classification (IPC)7: H01J 29/02, H01J 31/12 (86) International application number: PCT/US0116/666 (87) International publication number: WO 0200/5307 (17.01.2002 Gazette 2002/03)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 12.07.2000 US 614367 (71) Applicant: Motorola, Inc. Phoenix, AZ 85018 (US)	(72) Inventors: XIE, Chenggang Phoenix, AZ 85045 (US) WEI, Yi Chandler, AZ 85226 (US) (74) Representative: Treleven, Colin  Motorola European Intellectual Property Operations,Midpoint,Alencon Link Basingstoke,Hampshire RG21 7PL Basingstoke,Hampshire RG21 7PL (GB)