Sau khi t\u1ed1t nghi\u1ec7p th\u1ea1c s\u0129 khoa \u0111i\u1ec7n t\u1eed, \u0110\u1ea1i h\u1ecdc Tokushima [1979], gi\u1ed1ng nh\u01b0 ph\u1ea7n l\u1edbn c\u00e1c sinh vi\u00ean kh\u00e1c \u1edf Nh\u1eadt, t\u00f4i mu\u1ed1n \u0111\u01b0\u1ee3c \u0111\u1ea7u qu\u00e2n cho m\u1ed9t c\u00f4ng ty l\u1edbn, b\u1edfi b\u01b0\u1edbc ch\u00e2n v\u00e0o \u0111\u00f3, ch\u00fang t\u00f4i s\u1ebd y\u00ean tr\u00ed c\u00f3 vi\u1ec7c l\u00e0m c\u00f4ng \u0103n l\u01b0\u01a1ng \u1ed5n \u0111\u1ecbnh c\u1ea3 \u0111\u1eddi. Th\u1ebf nh\u01b0ng s\u1ed1 ph\u1eadn run r\u1ee7i, v\u00ec nhi\u1ec1u l\u00fd do c\u00e1 nh\u00e2n kh\u00e1c nhau, t\u00f4i ph\u1ea3i \u1edf l\u1ea1i t\u1ec9nh Tokushima.\u00a0<\/p>\n

V\u00ec l\u00e0 t\u1ec9nh l\u1ebb n\u00ean \u1edf Tokushima kh\u00f4ng c\u00f3 c\u00f4ng ty n\u00e0o gi\u00fap t\u00f4i ph\u00e1t huy \u0111\u01b0\u1ee3c chuy\u00ean m\u00f4n \u0111i\u1ec7n t\u1eed \u0111\u00e3 h\u1ecdc \u1edf tr\u01b0\u1eddng. T\u00f4i nh\u1edd gi\u00e1o s\u01b0 h\u01b0\u1edbng d\u1eabn gi\u1edbi thi\u1ec7u vi\u1ec7c l\u00e0m, v\u00e0 th\u1ebf l\u00e0 t\u00f4i \u0111\u1ebfn v\u1edbi C\u00f4ng ty H\u00f3a ch\u1ea5t Nichia, m\u1ed9t c\u00f4ng ty nghi\u00ean c\u1ee9u v\u00e0 s\u1ea3n xu\u1ea5t c\u00e1c v\u1eadt li\u1ec7u hu\u1ef3nh quang. Khi \u1ea5y, gi\u00e1o s\u01b0 c\u1ee7a t\u00f4i n\u00f3i: \u201cAnh ph\u1ea3i ch\u1ea5p nh\u1eadn l\u00e0m tr\u00e1i ng\u00e0nh tr\u00e1i ngh\u1ec1 th\u00f4i, b\u1edfi v\u00ec \u0111\u1ea5y l\u00e0 m\u1ed9t c\u00f4ng ty h\u00f3a ch\u1ea5t, ch\u1eb3ng c\u00f3 c\u00f4ng vi\u1ec7c n\u00e0o d\u00f9ng \u0111\u1ebfn c\u00e1i chuy\u00ean m\u00f4n \u0111i\u1ec7n t\u1eed c\u1ee7a anh \u0111\u00e2u. Anh ph\u1ea3i ngh\u0129 l\u00e0 m\u00ecnh l\u00e0m vi\u1ec7c \u0111\u1ec3 lo cho gia \u0111\u00ecnh.\u201d<\/p>\n

$\"giai_noel_-_nguoi_nhat\"$ <\/p>\n

Gi\u00e1o s\u01b0 Shuji Nakamura\u00a0<\/p>\n

V\u1eady l\u00e0 t\u00f4i \u0111i l\u00e0m v\u1edbi t\u00e2m th\u1ebf nh\u01b0 v\u1eady. Nichia c\u00f3 180 nh\u00e2n vi\u00ean v\u00e0 doanh thu h\u1eb1ng n\u0103m kho\u1ea3ng hai – ba t\u1ec9 y\u00ean [19 \u2013 27 tri\u1ec7u USD], t\u1ea5t c\u1ea3 \u0111\u1ec1u nh\u1edd v\u00e0o vi\u1ec7c b\u00e1n c\u00e1c v\u1eadt li\u1ec7u hu\u1ef3nh quang. T\u00f4i \u0111\u01b0\u1ee3c ph\u00e2n v\u00e0o ban ph\u00e1t tri\u1ec3n s\u1ea3n ph\u1ea9m. G\u1ecdi l\u00e0 \u201cban\u201d cho oai ch\u1ee9 th\u1ef1c ra t\u1ea5t c\u1ea3 ch\u1ec9 g\u1ed3m c\u00f3 m\u1ed9t v\u1ecb tr\u01b0\u1edfng ban v\u00e0 hai nh\u00e2n vi\u00ean. C\u00f3 m\u1ed9t \u0111i\u1ec1u t\u00ecnh c\u1edd l\u00e0 ngay t\u1eeb khi m\u1edbi v\u00e0o ban, t\u00f4i \u0111\u00e3 \u0111\u01b0\u1ee3c giao th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n tinh th\u1ec3 cho ch\u1ea5t b\u00e1n d\u1eabn gallium phosphate (GaP). \u0110\u00e2y l\u00e0 m\u1ed9t tinh th\u1ec3 n\u1ed5i ti\u1ebfng, c\u00f3 th\u1ec3 d\u00f9ng cho c\u00e1c LED m\u00e0u xanh l\u00e1 c\u00e2y v\u00e0 xanh c\u1ecf \u00faa. V\u00e0 th\u1ebf l\u00e0 t\u00f4i b\u01b0\u1edbc v\u00e0o h\u00e0nh tr\u00ecnh ph\u00e1t tri\u1ec3n LED. D\u00f9 ch\u1ea5p nh\u1eadn l\u00e0m tr\u00e1i ng\u00e0nh tr\u00e1i ngh\u1ec1 nh\u01b0 l\u1eddi khuy\u00ean c\u1ee7a gi\u00e1o s\u01b0, song th\u1ef1c t\u1ebf l\u1ea1i di\u1ec5n ra kh\u00e1c h\u1eb3n, v\u00e0 t\u00f4i c\u1ea3m th\u1ea5y m\u00ecnh v\u00f4 c\u00f9ng may m\u1eafn v\u00ec t\u00f4i c\u0169ng th\u00edch nghi\u00ean c\u1ee9u v\u1ec1 b\u00e1n d\u1eabn.<\/p>\n

Th\u1eddi \u0111i\u1ec3m \u1ea5y, Nichia v\u1ebb nh\u01b0 c\u00f3 th\u1ec3 b\u1ecb ph\u00e1 s\u1ea3n b\u1ea5t k\u1ef3 l\u00fac n\u00e0o. N\u0103m tr\u01b0\u1edbc \u0111\u00f3, c\u00f4ng ty \u0111\u00e3 ph\u1ea3i th\u1ef1c hi\u1ec7n m\u1ed9t \u0111\u1ee3t sa th\u1ea3i lao \u0111\u1ed9ng v\u00e0 ti\u1ebft gi\u1ea3m chi ti\u00eau \u0111\u1ebfn m\u1ee9c c\u1ea7n m\u1ed9t c\u00e1i b\u00fat ch\u00ec c\u0169ng ph\u1ea3i xin ch\u1eef k\u00fd c\u1ee7a tr\u01b0\u1edfng ban. C\u00f4ng ty kh\u00f4ng c\u00f3 ti\u1ec1n \u0111\u1ec3 \u0111\u1ea7u t\u01b0, th\u1eadm ch\u00ed d\u1ee5ng c\u1ee5 l\u00e0m th\u00ed nghi\u1ec7m c\u0169ng thi\u1ebfu th\u1ed1n, nh\u01b0ng t\u00f4i v\u1eabn quy\u1ebft t\u00e2m l\u00e0m cho b\u1eb1ng \u0111\u01b0\u1ee3c \u0111\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u m\u00e0 c\u00f4ng ty \u0111\u00e3 tin t\u01b0\u1edfng giao ph\u00f3.<\/p>\n

H\u1ed3i \u0111\u00f3 ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p Bridgman n\u1eb1m ngang, y\u00eau c\u1ea7u ng\u01b0\u1eddi l\u00e0m th\u00ed nghi\u1ec7m ph\u1ea3i \u0111\u01b0a nguy\u00ean li\u1ec7u th\u00f4 v\u00e0o m\u1ed9t \u1ed1ng th\u1ea1ch anh trong su\u1ed1t. T\u00f4i c\u0169ng nghi\u00ean c\u1ee9u c\u00e1c lo\u1ea1i s\u00e1ch k\u1ef9 thu\u1eadt, nh\u01b0ng c\u00f4ng vi\u1ec7c kh\u00f4ng m\u1ea5y ti\u1ebfn tri\u1ec3n v\u00ec t\u00f4i l\u00e0m vi\u1ec7c c\u00f3 m\u1ed9t m\u00ecnh. V\u1edbi m\u1ed9t c\u00f4ng ty s\u1ea3n xu\u1ea5t th\u00ec m\u1ee5c ti\u00eau ch\u00ednh l\u00e0 ch\u1ebf t\u1ea1o s\u1ea3n ph\u1ea9m, n\u00ean v\u1ecb tr\u01b0\u1edfng ban th\u00fac gi\u1ee5c t\u00f4i \u0111\u01b0a ra th\u00e0nh ph\u1ea9m c\u00e0ng s\u1edbm c\u00e0ng t\u1ed1t. Th\u1ebf l\u00e0 ng\u00e0y n\u00e0o t\u00f4i c\u0169ng l\u00fai h\u00fai h\u00e0n \u1ed1ng th\u1ea1ch anh, nh\u1ed3i nguy\u00ean li\u1ec7u th\u00f4 v\u00e0o \u1ed1ng r\u1ed3i \u0111\u1ed1t n\u00f3ng \u1ed1ng trong l\u00f2, nh\u01b0ng ch\u00fang to\u00e0n n\u1ed5 \u201cb\u00f9ng\u201d. V\u00ec t\u00f4i l\u00e0m th\u00ed nghi\u1ec7m \u1edf t\u1ec9nh l\u1ebb n\u00ean nh\u1eefng s\u01a1 s\u1ea9y \u1ea5y \u0111\u01b0\u1ee3c cho qua, ch\u1ee9 n\u1ebfu l\u00e0 \u1edf th\u00e0nh ph\u1ed1 th\u00ec \u0111\u00e3 b\u1ecb c\u1ea5m c\u1eeda ngay l\u1eadp t\u1ee9c.<\/p>\n

T\u00f4i nghi\u00ean c\u1ee9u GaP v\u00e0 ba n\u0103m ti\u1ebfp theo nghi\u00ean c\u1ee9u gallium arsenide (GaAs). V\u1edbi GaAs, t\u00f4i c\u0169ng kh\u00f4ng l\u00e0m g\u00ec kh\u00e1c ngo\u00e0i vi\u1ec7c h\u00e0n \u1ed1ng th\u1ea1ch anh. K\u1ec3 t\u1eeb khi b\u01b0\u1edbc ch\u00e2n v\u00e0o c\u00f4ng ty, h\u1ea7u nh\u01b0 ng\u00e0y n\u00e0o t\u00f4i c\u0169ng h\u00e0n \u1ed1ng t\u1eeb s\u00e1ng t\u1edbi t\u1ed1i. Th\u1ef1c ch\u1ea5t khi \u0111\u00f3 t\u00f4i ch\u1ec9 l\u00e0 th\u1ee3 h\u00e0n \u1ed1ng. T\u00f4i c\u1ee9 ngh\u0129 r\u1eb1ng \u0111\u1eddi m\u00ecnh th\u1ebf l\u00e0 xong, v\u00e0 t\u00f4i s\u1ebd l\u00e0 th\u1ee3 h\u00e0n \u1ed1ng su\u1ed1t \u0111\u1eddi.<\/p>\n

Sau khi ph\u00e1t tri\u1ec3n v\u1eadt li\u1ec7u GaP, t\u00f4i l\u1ea1i b\u1eaft tay v\u00e0o vi\u1ec7c t\u00ecm ch\u1ed7 b\u00e1n v\u1eadt li\u1ec7u. T\u00f4i th\u1ef1c hi\u1ec7n m\u1ecdi c\u00f4ng \u0111o\u1ea1n, t\u1eeb nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n, s\u1ea3n xu\u1ea5t, ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng, cho t\u1edbi b\u00e1n s\u1ea3n ph\u1ea9m; b\u1edfi l\u1ebd Nichia l\u00e0 m\u1ed9t c\u00f4ng ty chuy\u00ean v\u1ec1 h\u00f3a ch\u1ea5t, n\u00ean kh\u00f4ng c\u00f3 ng\u01b0\u1eddi am hi\u1ec3u v\u1ec1 ch\u1ea5t b\u00e1n d\u1eabn \u0111\u1ec3 c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch v\u1ec1 v\u1eadt li\u1ec7u n\u00e0y cho kh\u00e1ch h\u00e0ng. T\u00f4i g\u00f5 c\u1eeda c\u00e1c c\u00f4ng ty v\u00f4 s\u1ed1 l\u1ea7n \u0111\u1ec3 ch\u00e0o b\u00e1n s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh. Sau khi nghi\u00ean c\u1ee9u c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a n\u00f3, h\u1ecd n\u00f3i r\u1eb1ng n\u00f3 c\u0169ng ch\u1ec9 nh\u01b0 s\u1ea3n ph\u1ea9m c\u1ee7a c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c, r\u1ed3i quay sang h\u1ecfi t\u00f4i v\u1ec1 nh\u1eefng l\u1ee3i \u00edch khi mua s\u1ea3n ph\u1ea9m c\u1ee7a Nichia v\u00e0 ch\u1ea5t v\u1ea5n nh\u1eefng v\u1ea5n \u0111\u1ec1 \u0111\u1ea1i lo\u1ea1i nh\u01b0 quy tr\u00ecnh qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng. C\u00f3 l\u1ea7n c\u00f3 c\u00f4ng ty c\u00f2n y\u00eau c\u1ea7u t\u00f4i gi\u1ea3m gi\u00e1 s\u1ea3n ph\u1ea9m xu\u1ed1ng c\u00f2n m\u1ed9t n\u1eeda! K\u1ebft qu\u1ea3 l\u00e0 t\u00f4i kh\u00f4ng th\u1ec3 b\u00e1n \u0111\u01b0\u1ee3c qu\u00e1 1 tri\u1ec7u y\u00ean m\u1ed7i th\u00e1ng [kho\u1ea3ng 9 ngh\u00ecn USD].
\u00a0<\/p>\n

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>> Xem ti\u1ebfp b\u00e0i vi\u1ebft<\/a><\/p>\n

\u00a0<\/p>\n

Theo B\u00f9i Thu Trang l\u01b0\u1ee3c d\u1ecbch
(Ngu\u1ed3n: Tia S\u00e1ng, ng\u00e0y 05\/11\/2014)<\/strong><\/em><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"