WO200172508-A1  DATABASE WPI Derwent Publications Ltd., London, GB; Class L03, AN 2000-663486/64, XP002958692 & TW 387 133 A (IND. TECHNOLOGY RES. INST.) 11 April 2000;  DATABASE WPI Derwent Publications Ltd., London, GB; Class V03, AN 1995-049713, XP002958693 & SU 651 587 A1 (ALTMAN A B) 15 April 1994;  See also references of EP 1274566A4;  DATABASE WPI Derwent Publications Ltd., London, GB; Class L03, AN 2000-663486/64, XP002958692&TW 387 133 A (IND. TECHNOLOGY RES. INST.) 11 April 2000;  DATABASE WPI Derwent Publications Ltd., London, GB; Class V03, AN 1995-049713, XP002958693&SU 651 587 A1 (ALTMAN A B) 15 April 1994;  See also references of EP 1274566A1EP1274566-A1  PATENT ABSTRACTS OF JAPAN vol. 1999, no. 10, 31 August 1999 (1999-08-31) -&JP 11 126620 A (TOYOTA CENTRAL RES&DEV LAB INC), 11 May 1999 (1999-05-11);  CHOI W K ET AL: "H2 gas-sensing characteristics of SnOx sensors fabricated by a reactive ion-assisted deposition with/without an activator layer" SENSORS AND ACTUATORS B, ELSEVIER SEQUOIA S.A., LAUSANNE, CH, vol. 40, no. 1, 1 May 1997 (1997-05-01), pages 21-27, XP004122777 ISSN: 0925-4005;  See also references of WO 0172508A1US6828052-B2  Choi, W. K. et al., Sensors and Actuators B 40 (1997), pp. 21-27.;  Evans, C.J., "Tin-Nickel Plating of Electrical Instruments", Tin and Its Uses, No. 95, 1973, pp. 12-14.;  Evans, Colin J., "Tin and Tin Alloy Coatings Today", Tin and Its Uses, No. 142, 1984, pp. 13-16.;  Evans,Colin, J. "Tin Alloy Coatings Protect Automotive Parts", Tin and Its Uses, No. 150, 1986, pp. 4-6.;  Olmedo, A. M., "A Tin Alloy as an Alternative to Gold for Electrical Contents", Tin and Its Uses, No. 122, 1979, pp. 1-2.EP1274566-B1  CHOI W K ET AL: "H2 gas-sensing characteristics of SnOx sensors fabricated by a reactive ion-assisted deposition with/without an activator layer" SENSORS AND ACTUATORS B, ELSEVIER SEQUOIA S.A., LAUSANNE, CH, vol. 40, no. 1, 1 May 1997 (1997-05-01), pages 21-27, XP004122777 ISSN: 0925-4005;  DATABASE WPI Derwent Publications Ltd., London, GB; Class L03, AN 2000-663486/64, XP002958692 & TW 387 133 A (IND. TECHNOLOGY RES. INST.) 11 April 2000;  DATABASE WPI Derwent Publications Ltd., London, GB; Class V03, AN 1995-049713, XP002958693 & SU 651 587 A1 (ALTMAN A B) 15 April 1994;  PATENT ABSTRACTS OF JAPAN vol. 1999, no. 10, 31 August 1999 (1999-08-31) -& JP 11 126620 A (TOYOTA CENTRAL RES &AMP;DEV LAB INC), 11 May 1999 (1999-05-11)