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    • 1. 发明授权
    • Laser ablation mask and method of fabrication
    • 激光烧蚀掩模和制造方法
    • US5573875A
    • 1996-11-12
    • US569321
    • 1995-12-08
    • Leon H. KaplanDoris P. Pulaski
    • Leon H. KaplanDoris P. Pulaski
    • B23K26/06G03F1/00G03F7/40H01L21/027G03F9/00
    • G03F1/50Y10T428/24355
    • A laser ablation mask and a method of fabrication therefor. The mask has a pattern of clear areas and scattering areas. The scattering areas are covered with randomly formed facets. The facets act as scattering centers. Areas clear of facets transmit laser energy. Scattering areas refract laser energy. Laser energy directed at the mask, will pass through the clear mask areas to selectively ablate an organic layer placed opposite the mask. However, laser energy is scattered when striking and passing through the scattering areas such that insufficient laser energy passes directly through the mask to reach the organic layer for ablation to occur. The mask is formed by depositing and patterning a metal mask layer on a quartz plate. The patterned mask layer protects intended clear areas. Scattering areas are formed in unprotected plate areas by subjecting the plate to a polymethacrylic acid/bifluoride solution.
    • 一种激光烧蚀掩模及其制造方法。 掩模具有清晰的区域和散射区域的图案。 散射区域被随机形成的小平面覆盖。 方面作为散射中心。 无光面的区域传输激光能量。 散射区折射激光能量。 指向面罩的激光能量将通过透明掩模区域,以选择性地烧蚀与掩模相对放置的有机层。 然而,当撞击并穿过散射区域时,激光能量被散射,使得激光能量不足直接通过掩模到达有机层以进行消融。 通过在石英板上沉积和图案化金属掩模层来形成掩模。 图案化掩模层保护预期的清晰区域。 散射区域通过使该板接受聚甲基丙烯酸/二氟化物溶液而形成在未受保护的板区域中。
    • 2. 发明授权
    • Fabrication of laser ablation masks by wet etching
    • 通过湿蚀刻制造激光烧蚀掩模
    • US5254202A
    • 1993-10-19
    • US864838
    • 1992-04-07
    • Leon H. Kaplan
    • Leon H. Kaplan
    • C04B41/53C04B41/91G03F1/54G03F1/80B44C1/22C03C15/00C03C25/06C23F1/00
    • C04B41/009C04B41/5353C04B41/91G03F1/54G03F1/80Y10T428/24331Y10T428/24917Y10T428/24926
    • Tantalum (or hafnium) oxide layers, alternated with silicon oxide layers in a dielectric stack reflector type mask for high power laser ablation, are wet etched at a high temperature with a highly caustic solution, preferably potassium hydroxide, to provide a much increased manufacturing yield in comparison with known processes such as ion milling. High feature density is achieved through the use of a resist which is built in two patterning steps. Preferably, a chromium layer is deposited and covered with an organic resist which is patterned by an optical or electron beam exposure. The chromium is then etched by means of the resist mask to form a resist for the caustic wet etch of the tantalum (or hafnium) oxide either separately or together with silicon oxide layers of the dielectric stack reflector mask to be used in the laser ablation process at high power.
    • 在用于大功率激光烧蚀的电介质堆叠反射器型掩模中与氧化硅层交替的钽(或铪)氧化物层在高温下用高苛性碱溶液(优选氢氧化钾)进行湿法蚀刻,以提供大大提高的制造成品率 与已知的方法如离子研磨相比。 通过使用内置于两个图案化步骤中的抗蚀剂来实现高特征密度。 优选地,沉积铬层并用有机抗蚀剂覆盖,该有机抗蚀剂通过光学或电子束曝光被图案化。 然后通过抗蚀剂掩模蚀刻铬,以形成用于钽(或铪)氧化物的苛性湿法蚀刻的抗蚀剂,分别或与电介质堆叠反射器掩模的氧化硅层一起用于激光烧蚀过程 在高功率。