Secondary emission coating for photomultiplier tubes - Patent 0908917

(19)

(11)

EP 0 908 917 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	22.03.2000 Bulletin 2000/12

(43)	Date of publication A2:
	14.04.1999 Bulletin 1999/15

(21)	Application number: 98308254.6

(22)	Date of filing: 09.10.1998

(51)	International Patent Classification (IPC)⁷: H01J 1/32, H01J 43/10

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

10.10.1997 US 947497

(71)	Applicant: Burle Technologies, Inc.
	Wilmington DE 19899 (US)

(72)	Inventor:
	Caracciolo, Robert Lancaster, PA 17603 (US)

(74)	Representative: Dawson, Elizabeth Ann et al
	A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)

(54)	Secondary emission coating for photomultiplier tubes

(57) A p-doped diamond film deposited upon a substrate is used to make exceptionally stable high current secondary electron emitters for photomultiplier tube dynodes.