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    • 71. 发明授权
    • Dose control technique for plasma doping in ultra-shallow junction formations
    • 用于等离子体掺杂在超浅结结构中的剂量控制技术
    • US06403453B1
    • 2002-06-11
    • US09626837
    • 2000-07-27
    • Yoshi OnoYanjun MaSheng Teng Hsu
    • Yoshi OnoYanjun MaSheng Teng Hsu
    • H01L2126
    • H01L21/2236
    • A method of plasma doping substrates is provided. The substrate is covered with photoresist and placed within a plasma chamber. A doping gas is introduced into the chamber and ionized. A dilutant gas is also introduced to provide better control of the total amount of dosage associated with a given duration of exposure. The dilutant gas is preferably monatomic to reduce, or eliminate, affects associated with pressure variations within the chamber caused by dissociation of elements within the plasma chamber. The dilutant gas preferably contains lighter elements so as to reduce, or eliminate, damage to the photoresist caused by ion impacts. The dilutant gas is preferably neon or helium. The present method provides a means to better control the dosage and reduce photoresist damage and contamination.
    • 提供了一种等离子体掺杂衬底的方法。 衬底被光致抗蚀剂覆盖并置于等离子体室内。 将掺杂气体引入室并离子化。 还引入稀释气体以更好地控制与给定的暴露持续时间相关的剂量的总量。 稀释气体优选是单原子的,以减少或消除由等离子体室内的元素解离引起的室内压力变化的影响。 稀释气体优选含有较轻的元素,以便减少或消除由离子冲击引起的光致抗蚀剂的损伤。 稀释气体优选为氖气或氦气。 本方法提供了更好地控制剂量并减少光致抗蚀剂损伤和污染的方法。