EP631329-A  PATENT ABSTRACTS OF JAPAN vol. 007, no. 222 (E-201)4 October 1983 & JP-A-58 112 374 (FUJI DENKI SOUGOU KENKYUSHO:KK;OTHERS: 01) 4 July 1983;  PATENT ABSTRACTS OF JAPAN vol. 011, no. 212 (E-522)9 July 1987 & JP-A-62 033 479 (AGENCY OF IND SCIENCE & TECHNOL) 13 February 1987;  PATENT ABSTRACTS OF JAPAN vol. 015, no. 444 (E-1132)12 November 1991 & JP-A-03 188 681 (FUJI ELECTRIC CORP RES & DEV LTD;OTHERS: 01) 16 August 1991;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 469 (E-1271)29 September 1992 & JP-A-04 167 473 (SANYO ELECTRIC CO LTD) 15 June 1992;  PATENT ABSTRACTS OF JAPAN vol. 11, no. 275 (E-537)5 September 1987 & JP-A-62 073 765 (NEC CORP) 4 April 1987;  PATENT ABSTRACTS OF JAPAN vol. 11, no. 88 (E-490)(2535) 18 March 1987 & JP-A-61 242 085 (RICOH CO LTD) 28 October 1986EP631329-A1  Japanese Journal of Applied Physics, Vol. 28, No. 12, pp. 2436-2440 (Dec., 1989);  PATENT ABSTRACTS OF JAPAN vol. 007, no. 222 (E-201)4 October 1983 & JP-A-58 112 374 (FUJI DENKI SOUGOU KENKYUSHO:KK;OTHERS: 01);  PATENT ABSTRACTS OF JAPAN vol. 007, no. 222 (E-201)4 October 1983 &amp; JP-A-58 112 374 (FUJI DENKI SOUGOU KENKYUSHO:KK;OTHERS: 01) 4 July 1983;  PATENT ABSTRACTS OF JAPAN vol. 011, no. 212 (E-522)9 July 1987 & JP-A-62 033 479 (AGENCY OF IND SCIENCE & TECHNOL);  PATENT ABSTRACTS OF JAPAN vol. 011, no. 212 (E-522)9 July 1987 &amp; JP-A-62 033 479 (AGENCY OF IND SCIENCE &amp; TECHNOL) 13 February 1987;  PATENT ABSTRACTS OF JAPAN vol. 015, no. 444 (E-1132)12 November 1991 & JP-A-03 188 681 (FUJI ELECTRIC CORP RES & DEV LTD;OTHERS: 01);  PATENT ABSTRACTS OF JAPAN vol. 015, no. 444 (E-1132)12 November 1991 &amp; JP-A-03 188 681 (FUJI ELECTRIC CORP RES &amp; DEV LTD;OTHERS: 01) 16 August 1991;  PATENT ABSTRACTS OF JAPAN vol. 016, no. 469 (E-1271)29 September 1992 & JP-A-04 167 473 (SANYO ELECTRIC CO LTD);  PATENT ABSTRACTS OF JAPAN vol. 016, no. 469 (E-1271)29 September 1992 &amp; JP-A-04 167 473 (SANYO ELECTRIC CO LTD) 15 June 1992;  PATENT ABSTRACTS OF JAPAN vol. 11, no. 88 (E-490)(2535) 18 March 1987 & JP-A-61 242 085 (RICOH CO LTD);  PATENT ABSTRACTS OF JAPAN vol. 11, no. 88 (E-490)(2535) 18 March 1987 &amp; JP-A-61 242 085 (RICOH CO LTD) 28 October 1986;  PATENT ABSTRACTS OF JAPAN vol. 11, no. 275 (E-537)5 September 1987 &amp; JP-A-62 073 765 (NEC CORP) 4 April 1987