IIIH
US006757032B1
(12) United States Patent ao) Patent No.: us 6,757,032 Bi
Zhang et al. (45) Date of Patent: Jun. 29,2004
(54) ELECTRONIC DEVICE AND METHOD FOR FABRICATING THE SAME
(75) Inventors: Hongyong Zhang, Kanagawa (JP);
Masayuki Sakakura, Kanagawa (JP)
(73) Assignee: Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken (JP)
( * ) Notice: Subject to any disclaimer, the term ol this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/134,547
(22) Filed: Aug. 17, 1998
(30) Foreign Application Priority Data
Aug. 20, 1997 (JP) 9-240505
(51) Int. CI.7 G02F 1/136; G02F 1/1335
(52) U.S. CI 349/44; 349/113
(58) Field of Search 399/42-44, 158,
399/110, 49, 113
(56) References Cited
U.S. PATENT DOCUMENTS
6,057,896 A 5/2000 Rho et al 349/43
