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    • 2. 发明授权
    • Programmable read only memory in CMOS process flow
    • US06338992B1
    • 2002-01-15
    • US09726107
    • 2000-11-29
    • Shafqat AhmedHemanshu D. BhattCharles E. MayRobindranath Banerjee
    • Shafqat AhmedHemanshu D. BhattCharles E. MayRobindranath Banerjee
    • H01L218238
    • H01L27/112H01L21/8238
    • An improvement to a process for manufacturing complementary metal oxide semiconductor devices on a monolithic substrate, where the improved process forms nonvolatile memory devices and programmable logic devices. The improvement includes exposing gate electrodes of a selected portion of the complementary metal oxide semiconductor devices at a point in the process where the gate electrodes have been previously covered by a protective material layer. A capacitive material layer is deposited on the monolithic substrate, such that it contacts the exposed gate electrodes of the selected portion of the complementary metal oxide semiconductor devices. A top electrode material layer is deposited on the monolithic substrate, such that the top electrode material layer contacts the capacitive material layer in a region overlying the exposed gate electrodes of the selected portion of the complementary metal oxide semiconductor devices. The top electrode material layer and the capacitive material layer are removed to substantially the level of the upper surface of the protective material layer, thereby leaving the top electrode layer and the capacitive material layer overlying the gate electrodes for the selected portion of the complementary metal oxide semiconductor devices. In this manner, capacitors are formed from the top electrode material layer, the capacitive material layer, and the gate electrodes of the selected portion of the complementary metal oxide semiconductor devices. The improved process further includes forming nonvolatile memory devices from the selected portion of the complementary metal oxide semiconductor devices, and forming logic devices of the complementary metal oxide semiconductor devices that are not included in the selected portion of the complementary metal oxide semiconductor devices. Fuses are formed in associated with a portion of the nonvolatile memory devices to form read only memory devices of the fused portion of the nonvolatile memory devices.
    • 4. 发明授权
    • Programmable read only memory in CMOS process flow
    • US06495881B1
    • 2002-12-17
    • US10012835
    • 2001-10-22
    • Shafqat AhmedHemanshu D. BhattCharles E. MayRobindranath Banerjee
    • Shafqat AhmedHemanshu D. BhattCharles E. MayRobindranath Banerjee
    • H01L29788
    • H01L27/112H01L21/8238
    • An improvement to a process for manufacturing complementary metal oxide semiconductor devices on a monolithic substrate, where the improved process forms nonvolatile memory devices and programmable logic devices. The improvement includes exposing gate electrodes of a selected portion of the complementary metal oxide semiconductor devices at a point in the process where the gate electrodes have been previously covered by a protective material layer. A capacitive material layer is deposited on the monolithic substrate, such that it contacts the exposed gate electrodes of the selected portion of the complementary metal oxide semiconductor devices. A top electrode material layer is deposited on the monolithic substrate, such that the top electrode material layer contacts the capacitive material layer in a region overlying the exposed gate electrodes of the selected portion of the complementary metal oxide semiconductor devices. The top electrode material layer and the capacitive material layer are removed to substantially the level of the upper surface of the protective material layer, thereby leaving the top electrode layer and the capacitive material layer overlying the gate electrodes for the selected portion of the complementary metal oxide semiconductor devices. In this manner, capacitors are formed from the top electrode material layer, the capacitive material layer, and the gate electrodes of the selected portion of the complementary metal oxide semiconductor devices. The improved process further includes forming nonvolatile memory devices from the selected portion of the complementary metal oxide semiconductor devices, and forming logic devices of the complementary metal oxide semiconductor devices that are not included in the selected portion of the complementary metal oxide semiconductor devices. Fuses are formed in associated with a portion of the nonvolatile memory devices to form read only memory devices of the fused portion of the nonvolatile memory devices.
    • 7. 发明授权
    • Temperature control system
    • US06967177B1
    • 2005-11-22
    • US09670975
    • 2000-09-27
    • Charles E. MayHemanshu D. Bhatt
    • Charles E. MayHemanshu D. Bhatt
    • B05C11/00C23C16/00C23F1/00H01L21/00H01L21/26H01L21/306H01L21/324H01L21/42H01L21/477
    • H01L21/67248H01L21/67109
    • An apparatus for controlling the substrate temperature of a substrate during processing of the substrate at a process energy. A chuck temperature input receives temperature measurements from temperature sensors at a substrate chuck, and a temperature set point input receives temperature set points. The temperature set points define a range of temperatures within which the apparatus maintains the substrate temperature. A chuck temperature controller output sends control signals to a chuck temperature controller, which signals are operable to selectively increase and decrease the chuck temperature. A process energy output sends control signals that are operable to selectively increase and decrease the process energy during the processing of the substrate. A controller compares the temperature measurements received from the temperature sensors at the substrate chuck through the chuck temperature input to the temperature set points received through the temperature set point input. The controller sends control signals through the chuck temperature controller output to the chuck temperature controller to selectively decrease the chuck temperature when the temperature measurements received from the temperature sensors at the substrate chuck are above the temperature set points. The controller further sends control signals through the process energy output to selectively decrease the process energy when the temperature measurements received from the temperature sensors at the substrate chuck are above the temperature set point. Preferably, the controller first sends control signals through the chuck temperature controller output to control the chuck temperature, and only sends control signals through the process energy output when the chuck temperature cannot be sufficiently controlled by the chuck temperature controller.
    • 8. 发明授权
    • Process for planarizing an isolation structure in a substrate
    • 用于平坦化衬底中的隔离结构的方法
    • US06482075B1
    • 2002-11-19
    • US09670998
    • 2000-09-27
    • Hemanshu D. BhattShafqat AhmedRobindranath BanerjeeCharles E. May
    • Hemanshu D. BhattShafqat AhmedRobindranath BanerjeeCharles E. May
    • B24B100
    • H01L21/76232H01L21/76229
    • A process is described for planarizing an isolation structure in a substrate. The process includes depositing a pad protective material over an upper surface of the substrate, and selectively removing portions of the pad protective material to expose portions of the substrate and to form sidewalls in the pad protective material. A trench is formed in the exposed portions of the substrate, and a trench fill material is deposited in the trench and over the pad protective material. A trench protective material is deposited over the trench fill material and in contact with the sidewalls of the pad protective material, such that the pad protective material and portions of the trench protective material together form a continuous protective material layer. Portions of the trench protective material and the trench fill material are selectively removed down to the level of the upper surface of the pad protective material. Finally, the pad protective material and any remaining trench protective material is removed, leaving the trench filled with trench fill material that is planarized at the upper surface of the substrate. By forming a continuous protective material layer that completely covers the trench fill material in the trench, that material is protected during later process steps that nonselectively remove trench fill material lying outside the trench. In this manner, the trench fill material lying outside the trench may be removed without photolithographic masking and patterning steps. Thus, the process according to the invention reduces the cost and complexity of planarizing the trench fill material.
    • 描述了用于平坦化衬底中的隔离结构的过程。 该方法包括在衬底的上表面上沉积衬垫保护材料,以及选择性地去除衬垫保护材料的部分以暴露衬底的部分并在衬垫保护材料中形成侧壁。 在衬底的暴露部分中形成沟槽,并且沟槽填充材料沉积在沟槽中并在衬垫保护材料上方。 沟槽保护材料沉积在沟槽填充材料上并与衬垫保护材料的侧壁接触,使得衬垫保护材料和沟槽保护材料的一部分一起形成连续的保护材料层。 选择性地将沟槽保护材料和沟槽填充材料的部分向下移动到焊盘保护材料的上表面的高度。 最后,去除衬垫保护材料和任何剩余的沟槽保护材料,留下填充沟槽填充材料的沟槽,其在衬底的上表面处被平坦化。 通过形成完全覆盖沟槽中的沟槽填充材料的连续保护材料层,该材料在后续工艺步骤期间受到保护,非选择性地去除位于沟槽外部的沟槽填充材料。 以这种方式,可以在没有光刻掩模和图案化步骤的情况下去除位于沟槽外部的沟槽填充材料。 因此,根据本发明的方法降低了沟槽填充材料的平面化的成本和复杂性。
    • 9. 发明授权
    • Process for improving mechanical strength of layers of low k dielectric material
    • 用于提高低k介电材料层的机械强度的方法
    • US06566244B1
    • 2003-05-20
    • US10138609
    • 2002-05-03
    • Charles E. MayVenkatesh P. GopinathPeter J. Wright
    • Charles E. MayVenkatesh P. GopinathPeter J. Wright
    • H01L214763
    • H01L23/562H01L21/76801H01L21/76829H01L23/53295H01L2924/0002H01L2924/00
    • A process for selectively reinforcing portions of a low k dielectric material which comprises first forming a low k dielectric layer, then forming openings in the low k layer in portions of the low k layer needing reinforcement, and then filling the openings with reinforcing material, preferably reinforcing material having a higher Young's modulus of elasticity than the low k dielectric material. Such selective reinforcement of certain portions of low k dielectric material may comprise selectively reinforcing the low k dielectric material beneath the bonding pads, with reinforcing material. The low k dielectric material may be reinforced by openings in the low k dielectric material formed beneath portions of the low k dielectric layer where a capping layer will be formed over the low k dielectric material. Subsequent formation of the capping layer will simultaneously fill the openings with capping material, which may then also function as reinforcement material in the openings.
    • 一种用于选择性地增强低k介电材料的部分的方法,其包括首先形成低k电介质层,然后在需要加强的低k层的部分中在低k层中形成开口,然后用增强材料填充开口,优选地 具有比低k介电材料更高的杨氏弹性模量的增强材料。 低k电介质材料的某些部分的这种选择性增强可以包括用增强材料选择性地增强接合焊盘下面的低k电介质材料。 低k电介质材料可以通过在低k电介质层的下部形成的低k电介质材料中的开口加强,其中覆盖层将形成在低k电介质材料上。 覆盖层的随后的形成将同时用封盖材料填充开口,该封盖材料然后也可以用作开口中的增强材料。