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    • 2. 发明授权
    • Method of fabricating integrated coil inductors for IC devices
    • IC器件集成线圈电感器的制造方法
    • US06720230B2
    • 2004-04-13
    • US10238746
    • 2002-09-10
    • Raul E. AcostaMelanie L. CarassoSteven A. CordesRobert A. GrovesJennifer L. LundJoanna Rosner
    • Raul E. AcostaMelanie L. CarassoSteven A. CordesRobert A. GrovesJennifer L. LundJoanna Rosner
    • H01L2120
    • H01L28/10H01F17/0006H01F17/0033H01F41/041H01L27/08
    • A means for fabrication of solenoidal inductors integrated in a semiconductor chip is provided. The solenoidal coil is partially embedded in a deep well etched into the chip substrate. The non-embedded part of the coil is fabricated as part of the BEOL metallization layers. This allows for a large cross-sectional area of the solenoid turns, thus reducing the turn-to-turn capacitive coupling. Because the solenoidal coils of this invention have a large diameter cross-section, the coil can be made with a large inductance value and yet occupy a small area of the chip. The fabrication process includes etching of a deep cavity in the substrate after all the FEOL steps are completed; lining said cavity with a dielectric followed by fabrication of the part of the coil that will be embedded by deposition of a conductive material metal through a mask; deposition of dielectric and planarization of same by CMP. After planarization the fabrication of the remaining part of the solenoidal coil is fabricated as part of the metallization in the BEOL (i.e. as line/vias of the BEOL). To further increase the cross section of the solenoidal coil part of it may be built by electrodeposition through a mask on top of the BEOL layers.
    • 提供一种用于制造集成在半导体芯片中的螺线管电感器的装置。 螺线管线圈部分地嵌入到蚀刻到芯片衬底中的深阱中。 线圈的非嵌入部分被制造为BEOL金属化层的一部分。 这允许螺线管的大的横截面积的匝数,从而减少匝间电容耦合。 由于本发明的螺线管线圈具有大直径的横截面,所以线圈可以制造成具有大的电感值,并且占据芯片的小面积。 所述制造工艺包括在所有FEOL步骤完成之后蚀刻衬底中的深空腔; 用电介质衬里所述空腔,然后制造将通过掩模沉积导电材料金属而嵌入的线圈部分; 通过CMP沉积其相同的电介质和平面化。 在平坦化之后,螺线管线圈的剩余部分的制造被制造为BEOL中的金属化的一部分(即,作为BEOL的线/通路)。 为了进一步增加螺线管线圈的横截面,可以通过电沉积通过BEOL层顶部的掩模来构建。
    • 7. 发明授权
    • Integrated coil inductors for IC devices
    • 用于IC器件的集成线圈电感器
    • US06492708B2
    • 2002-12-10
    • US09808381
    • 2001-03-14
    • Raul E. AcostaMelanie L. CarassoSteven A. CordesRobert A. GrovesJennifer L. LundJoanna Rosner
    • Raul E. AcostaMelanie L. CarassoSteven A. CordesRobert A. GrovesJennifer L. LundJoanna Rosner
    • H01L2900
    • H01L28/10H01F17/0006H01F17/0033H01F41/041H01L27/08
    • A means for fabrication of solenoidal inductors integrated in a semiconductor chip is provided. The solenoidal coil is partially embedded in a deep well etched into the chip substrate. The non-embedded part of the coil is fabricated as part of the BEOL metallization layers. This allows for a large cross-sectional area of the solenoid turns, thus reducing the turn-to-turn capacitive coupling. Because the solenoidal coils of this invention have a large diameter cross-section, the coil can be made with a large inductance value and yet occupy a small area of the chip. The fabrication process includes etching of a deep cavity in the substrate after all the FEOL steps are completed; lining said cavity with a dielectric followed by fabrication of the part of the coil that will be embedded by deposition of a conductive material metal through a mask; deposition of dielectric and planarization of same by CMP. After planarization the fabrication of the remaining part of the solenoidal coil is fabricated as part of the metallization in the BEOL (i.e. as line/vias of the BEOL). To further increase the cross section of the solenoidal coil part of it may be built by electrodeposition through a mask on top of the BEOL layers.
    • 提供一种用于制造集成在半导体芯片中的螺线管电感器的装置。 螺线管线圈部分地嵌入到蚀刻到芯片衬底中的深阱中。 线圈的非嵌入部分被制造为BEOL金属化层的一部分。 这允许螺线管的大的横截面积的匝数,从而减少匝间电容耦合。 由于本发明的螺线管线圈具有大直径的横截面,所以线圈可以制造成具有大的电感值,并且占据芯片的小面积。 所述制造工艺包括在所有FEOL步骤完成之后蚀刻衬底中的深空腔; 用电介质衬里所述空腔,然后制造将通过掩模沉积导电材料金属而嵌入的线圈部分; 通过CMP沉积其相同的电介质和平面化。 在平坦化之后,螺线管线圈的剩余部分的制造被制造为BEOL中的金属化的一部分(即,作为BEOL的线/通路)。 为了进一步增加螺线管线圈的横截面,可以通过电沉积通过BEOL层顶部的掩模来构建。