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    • 3. 发明授权
    • Through substrate VIAS
    • 通过基底VIAS
    • US08329579B2
    • 2012-12-11
    • US13188084
    • 2011-07-21
    • Paul W. SandersMichael F. PetrasChandrasekaram Ramiah
    • Paul W. SandersMichael F. PetrasChandrasekaram Ramiah
    • H01L21/44H01L23/04
    • H01L21/76898H01L23/481H01L2924/0002H01L2924/12044H01L2924/3011H01L2924/00
    • Through substrate vias (TSVs) are provided after substantially all high temperature operations needed to form a device region of a first thickness proximate the front surface of a substrate wafer by: (i) from the front surface, forming comparatively shallow vias of a first aspect ratio containing first conductors extending preferably through the first thickness but not through the initial wafer thickness, (ii) removing material from the rear surface to form a modified wafer of smaller final thickness with a new rear surface, and (iii) forming from the new rear surface, much deeper vias of second aspect ratios beneath the device region with second conductors therein contacting the first conductors, thereby providing front-to-back interconnections without substantially impacting wafer robustness during manufacturing and device region area. Both aspect ratios are desirably about ≦40, usefully ≦10 and preferably ≦5.
    • 在基本上所有的高温操作之后提供通过衬底通孔(TSV),所述高温操作是通过以下步骤形成靠近衬底晶片的前表面的第一厚度的器件区域:(i)从前表面形成第一方面的较浅的通孔 比例包含优选地穿过第一厚度而不是通过初始晶片厚度的第一导体,(ii)从后表面去除材料以形成具有新的后表面的较小最终厚度的改性晶片,以及(iii)从新的 后表面,在器件区域下方的第二宽高比的深度更深的通孔,其中其中第二导体接触第一导体,从而在制造和器件区域区域中基本上不影响晶片坚固性而提供前后互连。 两个长宽比理想地约为< nlE; 40,有用地< 10;优选< nlE; 5。
    • 7. 发明授权
    • Semiconductor through silicon vias of variable size and method of formation
    • 半导体通过可变尺寸的硅通孔和形成方法
    • US07803714B2
    • 2010-09-28
    • US12059123
    • 2008-03-31
    • Chandrasekaram RamiahPaul W. Sanders
    • Chandrasekaram RamiahPaul W. Sanders
    • H01L21/302H01L21/461
    • H01L21/3065H01L21/76816H01L21/76898H01L23/481H01L2924/0002H01L2924/00
    • A through-silicon via structure is formed by providing a substrate having a first conductive catch pad and a second conductive catch pad formed thereon. The substrate is secured to a wafer carrier. A first etch of a first type is performed on the substrate underlying each of the first and second conductive catch pads to form a first partial through-substrate via of a first diameter underlying the first conductive catch pad and a second partial through-substrate via underlying the second conductive catch pad of a second diameter that differs from the first diameter. A second etch of a second type that differs from the first type is performed to continue etching the first partial through-substrate to form equal depth first and second through-substrate vias respectively to the first and second conductive catch pads.
    • 通过提供具有形成在其上的第一导电捕获垫和第二导电捕获垫的衬底来形成穿硅通孔结构。 衬底被固定到晶片载体上。 第一类型的第一蚀刻在第一和第二导电捕捉垫下面的衬底上进行,以形成第一部分通过衬底通孔,第一直径位于第一导电捕获垫下面,第二部分通过衬底通过下面的 与第一直径不同的第二直径的第二导电捕获垫。 执行与第一类型不同的第二类型的第二蚀刻,以继续蚀刻第一部分通过基板以分别形成相同深度的第一和第二贯穿基板通孔到第一和第二导电捕捉垫。