(19)
(11) EP 1 377 842 A1

(12)

(43) Date of publication:
07.01.2004 Bulletin 2004/02

(21) Application number: 02721475.8

(22) Date of filing: 19.03.2002
(51) International Patent Classification (IPC)7G01R 31/02
(86) International application number:
PCT/US2002/008418
(87) International publication number:
WO 2002/077654 (03.10.2002 Gazette 2002/40)
(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: 23.03.2001 US 278548 P

(71) Applicant: Solid State Measurements, Inc.
Pittsburgh, PA 15275 (US)

(72) Inventors:
  • HOWLAND, William, H.
    Wexford, PA 15090 (US)
  • HILLARD, Robert, J.
    Avalon, PA 15202 (US)

(74) Representative: van Westenbrugge, Andries 
Nederlandsch OctrooibureauScheveningseweg 82P.O. Box 29720
2502 LS Den Haag
2502 LS Den Haag (NL)

   


(54) METHOD OF DETECTING CARRIER DOSE OF A SEMICONDUCTOR WAFER