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    • 1. 发明授权
    • Non-lithographic shrink techniques for improving line edge roughness and using imperfect (but simpler) BARCs
    • 非光刻收缩技术,用于改善线边缘粗糙度并使用不完美(但更简单)的BARC
    • US07064846B1
    • 2006-06-20
    • US10646190
    • 2003-08-22
    • Gilles AmblardBhanwar SinghKhoi A. PhanRamkumar Subramanian
    • Gilles AmblardBhanwar SinghKhoi A. PhanRamkumar Subramanian
    • G01B11/04
    • G03F7/40
    • The present invention relates generally to photolithographic systems and methods, and more particularly to systems and methodologies that facilitate the reduction of line-edge roughness (LER) and/or standing wave expression during pattern line formation in an integrated circuit. Systems and methods are disclosed for retaining a target critical dimension (CD) of photoresist lines, comprising a non-lithographic shrink component that facilitates mitigating LER and/or standing wave expression, wherein the shrink component is employed to heat a particular resist to the glass transition temperature of the resist to effectuate mitigation of LER and/or standing wave expression. Additionally, by heating the resist to its glass transition temperature, the systems and methods of the present invention effectively impede deviation from a desired target critical dimension.
    • 本发明一般涉及光刻系统和方法,更具体地涉及有助于在集成电路中的图案线形成期间减少线边缘粗糙度(LER)和/或驻波表达的系统和方法。 公开了用于保持光致抗蚀剂线的目标临界尺寸(CD)的系统和方法,其包括有助于减轻LER和/或驻波表达的非光刻收缩组分,其中采用收缩组分将特定抗蚀剂加热到玻璃 抗蚀剂的转变温度来实现LER和/或驻波表达的缓解。 此外,通过将抗蚀剂加热至其玻璃化转变温度,本发明的系统和方法有效地阻止了偏离所需目标临界尺寸。
    • 4. 发明授权
    • Organic BARC with adjustable etch rate
    • 有机BARC具有可调蚀刻速率
    • US07262138B1
    • 2007-08-28
    • US10957111
    • 2004-10-01
    • Bhanwar SinghRamkumar SubramanianGilles Amblard
    • Bhanwar SinghRamkumar SubramanianGilles Amblard
    • H01L21/302
    • H01L21/0276
    • Systems and method for adjusting an etch rate of an organic bottom antireflective coating (BARC) layer on a wafer. The BARC layer can be exposed to an energy source at varied intensities to determine a relationship between bake temperature and solubility of the BARC after baking, which correlates to a rate at which the BARC can be etched. The BARC can be a cross-linking BARC, which becomes more cross-linked as bake temperature is increased, resulting in decreased etch rate, or can be a cleaving BARC, which is subject to removal of etch-resistant monomers as bake temperature is increased, resulting in increased etch rate. Thus, the invention provides for adjustable BARC etch rates that can be aligned to an etch rate of a photoresist deposited over the BARC to permit concurrent etching of both layers while mitigating structural defects that can occur if etch rates of the respective layers differ.
    • 用于调整晶片上的有机底部抗反射涂层(BARC)层的蚀刻速率的系统和方法。 BARC层可以以不同的强度暴露于能量源,以确定烘烤温度和烘烤后BARC的溶解度之间的关系,这与BARC可被蚀刻的速率相关。 BARC可以是交联的BARC,其随着烘烤温度的升高而变得更加交联,导致蚀刻速率降低,或者可以是裂解BARC,其随着烘烤温度的升高而被去除耐蚀刻单体 ,导致蚀刻速率增加。 因此,本发明提供可调节的BARC蚀刻速率,其可以与沉积在BARC上的光致抗蚀剂的蚀刻速率对准,以允许同时蚀刻两层,同时减轻如果各层的蚀刻速率不同时可能发生的结构缺陷。