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电子工程专辑
1 年
负胶的Undercut在lift-off工艺中的应用
光刻工艺中负胶因为粘度偏大,和正胶相反的曝光模式,被广泛应用,但是负胶精度没有正胶好,容易显影变形,价格也普遍相对较贵。 负胶:聚合物的短链分子因光照而交联成为长链分子的为负胶(cross linking)。或者说,光刻过程中被的光照的区域在 ...
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