Invention Application
WO2007079206A2 FABRICATION OF SEMICONDUCTOR DEVICE FOR FLASH MEMORY WITH INCREASED SELECT GATE WIDTH
审中-公开
具有增加的选择栅宽度的闪存存储器的半导体器件的制造
- Patent Title: FABRICATION OF SEMICONDUCTOR DEVICE FOR FLASH MEMORY WITH INCREASED SELECT GATE WIDTH
- Patent Title (中): 具有增加的选择栅宽度的闪存存储器的半导体器件的制造
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Application No.: PCT/US2006/049531Application Date: 2006-12-27
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Publication No.: WO2007079206A2Publication Date: 2007-07-12
- Inventor: HIGASHITANI, Masaaki , PHAM, Tuan , ICHIGE, Masayuki , HASHIMOTO, Koji , TANAKA, Satoshi , SUGIMAE, Kikuko
- Applicant: SANDISK CORPORATION , HIGASHITANI, Masaaki , PHAM, Tuan , ICHIGE, Masayuki , HASHIMOTO, Koji , TANAKA, Satoshi , SUGIMAE, Kikuko
- Applicant Address: 601 McCarthy Boulevard, Milpitas, CA 95035 US
- Assignee: SANDISK CORPORATION,HIGASHITANI, Masaaki,PHAM, Tuan,ICHIGE, Masayuki,HASHIMOTO, Koji,TANAKA, Satoshi,SUGIMAE, Kikuko
- Current Assignee: SANDISK CORPORATION,HIGASHITANI, Masaaki,PHAM, Tuan,ICHIGE, Masayuki,HASHIMOTO, Koji,TANAKA, Satoshi,SUGIMAE, Kikuko
- Current Assignee Address: 601 McCarthy Boulevard, Milpitas, CA 95035 US
- Agency: MAGEN, Burt
- Priority: US11/319,895 20051228
Abstract:
A non-volatile memory device having memory elements with a channel length of, e.g., 45-55 nm or less, is fabricated using existing lithographic techniques, hi one approach, patterns of first and second photomasks are transferred to the same photoresist layer. The first photomask can have openings with a given feature size F that are spaced apart by the feature size F, for instance. The second photomask has an opening which is sized to create a desired inter-select gate gap, such as 3F or 5F. A third photomask is used to provide protective portions in a second photoresist layer over the select gate structures. The final structure has memory elements of width F spaced apart by a distance F5 and select gates of width 3F spaced apart by 3F or 5F. In another approach, the patterns of three photomasks are transferred to respective photoresist layers to create an analogous final structure.
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