发明名称 Electron beam lithograph proximity correction method.
摘要 <p>Proximity effect is reduced or eliminated by breaking each shape of a lithographic exposure pattern into two parts, a perimeter part having a width on the order of the lithographic exposure pattern minimum linewidth and the remaining central part or parts (if any) which are completely surrounded by the perimeter part. Figure 2 shows the edge parts hatched and the centre part blank. The lithographic exposure pattern is then modified by moving or setting back the edges of each central part away from the perimeter part which surrounds it (similar to reducing the size of the central part) to form a nominally unexposed band separating each central part from the perimeter part which surrounds it. This is shown in Fig. 3.</p><p>The width of the nominally unexposed band in the modified exposure pattern is preferably chosen as large as possible so long as the condition is met that upon developing a radiation sensitive layer directly exposed to the modified exposure pattern, the nominally unexposed band develops (i.e., dissolves, resists dissolution, or is otherwise modified) substantially as if it were also exposed. The nominally unexposed band is exposed, in fact, by electrons scattered from the directly exposed part(s) of the shape (the perimeter part plus the central part, if any). The width of the nominally unexposed band is preferably about twice the edge bias applied to outside edges of each shape.</p>
申请公布号 EP0110042(A2) 申请公布日期 1984.06.13
申请号 EP19830109313 申请日期 1983.09.20
申请人 INTERNATIONAL BUSINESS MACHINES CORPORATION 发明人 JONES, FLETCHER
分类号 H01L21/027;G03F7/20;H01J37/317;(IPC1-7):03F7/20;01J37/317 主分类号 H01L21/027
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