MASK PATTERN FORMING METHOD AND SEMICONDUCTOR DEVICE MANUFACTURING METHOD

摘要

PURPOSE: A mask pattern forming method and a semiconductor device manufacturing method are provided to improve the etching process accuracy of the target etching layer by etching the target etching layer using the carbon layer having the high selectivity. CONSTITUTION: A second line part having a line width(L2) and a space width(S2) is arranged on the resist pattern(105a). The resist pattern is processed with the trimming in order to form a resist pattern(105b) consisting of the photoresist film(105). A reflection barrier layer(104) is etched with the trimmed resist pattern as the mask. A reflective barrier pattern(104a) having a line width(L3) and a space width(S3) is formed.