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    • 73. 发明申请
    • CMOS image sensor having enhanced photosensitivity and method for fabricating the same
    • 具有增强的光敏性的CMOS图像传感器及其制造方法
    • US20020033492A1
    • 2002-03-21
    • US09995215
    • 2001-11-26
    • Ju-Il LeeNan-Yi Lee
    • H01L027/148
    • H01L31/02162H01L31/02161H01L31/02327
    • There is provided a method for fabricating a CMOS image sensor having enhanced reliability and light sensitivity, which comprises the steps of providing a substrate including photosensitive elements and metal wire; forming a first protecting film for protecting the elements over the substrate, covering the metal wire; forming a flattened spin-on-glass film on the first protecting film; forming a second protecting film for protecting the elements on the spin-on-glass film; forming color filter patterns on the second protecting film; forming a photoresist film for flattening on the color filter patterns and the second protecting film; and forming microlenses on the photoresist film. By using the flattened SOG film and a photoresist for flattening and pad opening, the present invention can accomplish the thickness uniformity of the color filter corresponding to each unit pixel, the wire-bonding pad devoid of the residuals of the color filter materials and the figure uniformity of the microlenses. The total thickness of the films between the microlens and the photosensitive element of unit pixel can also be adjusted to focus the incident lights onto the photosensitive element of unit pixel.
    • 提供了一种制造具有增强的可靠性和光敏度的CMOS图像传感器的方法,其包括提供包括光敏元件和金属线的基板的步骤; 形成用于保护元件在基板上的第一保护膜,覆盖金属丝; 在第一保护膜上形成平坦化的旋涂玻璃膜; 形成用于保护旋涂玻璃膜上的元件的第二保护膜; 在第二保护膜上形成滤色器图案; 形成用于使滤色器图案和第二保护膜平坦化的光致抗蚀剂膜; 并在光致抗蚀剂膜上形成微透镜。 通过使用平坦化的SOG膜和用于平坦化和焊盘开口的光致抗蚀剂,本发明可以实现与每个单位像素相对应的滤色器的厚度均匀性,没有滤色器材料残留物的引线接合垫和图 微透镜的均匀性。 也可以调整微透镜和单位像素的感光元件之间的膜的总厚度,以将入射光聚焦到单位像素的感光元件上。
    • 74. 发明申请
    • Charge transfer device
    • 电荷转移装置
    • US20020024069A1
    • 2002-02-28
    • US09942143
    • 2001-08-29
    • NEC Corporation
    • Shiro Tsunai
    • H01L027/148H01L029/768
    • H04N5/363
    • A charge transfer device is provided which is capable of reducing a reset field-through noise in a stable manner without being affected by characteristics of transistors and without occurrence of a mustache-shaped pulse-like noise. The charge transfer device is made up of a floating diffusion region used to convert a signal charge transferred from a CCD (Charge Coupled Device) into a voltage, resetting unit used to eject the signal charge accumulated in the floating diffusion region in response to a reset pulse, a first stage source follower used to current-amplify the voltage and second stage source follower in which load is changed in response to the reset pulse and which is used to current-amplify an output voltage of the first stage source follower.
    • 提供一种电荷转移装置,其能够以不稳定的方式降低复位通过噪声,而不受晶体管的特性的影响,并且不发生胡塞状脉冲状噪声。 电荷转移装置由用于将从CCD(电荷耦合器件)传送的信号电荷转换成用于响应于复位而弹出积累在浮动扩散区域中的信号电荷的电压复位单元的浮动扩散区域 脉冲,用于对电压进行电流放大的第一级源极跟随器,并且响应于复位脉冲改变负载并且用于对第一级源极跟随器的输出电压进行电流放大的第二级源极跟随器。
    • 76. 发明申请
    • Semiconductor integrated circuit having a self-refresh function
    • 具有自刷新功能的半导体集成电路
    • US20020000581A1
    • 2002-01-03
    • US09562925
    • 2000-05-02
    • Kyoji Yamasaki
    • H01L027/148
    • G11C11/40611G11C11/406G11C2211/4061G11C2211/4067
    • A self-refresh circuit included in a semiconductor integrated circuit includes a ring oscillator, a double period counter, an SELF generating portion generating a signal SELFO corresponding to an internal RAS, and a BBUE generating portion. The double period counter performs a count operation, using the output signal of the double period counter as a basic signal. The BBUE generating portion generates a BBUE signal in accordance with the output of double period counter. When the BBUE rises to H-level, the self-refresh signal SELF corresponding to signal SELF0 is issued. A layout area can be small, and timing of entry in a self-refresh mode can be finely set.
    • 包括在半导体集成电路中的自刷新电路包括环形振荡器,双周期计数器,产生与内部RAS相对应的信号SELFO的SELF生成部分和BBUE产生部分。 双周期计数器使用双周期计数器的输出信号作为基本信号来执行计数操作。 BBUE生成部根据双周期计数器的输出生成BBUE信号。 当BBUE上升到H电平时,发出对应于信号SELF0的自刷新信号SELF。 布局区域可以很小,并且可以精细地设置自刷新模式中的输入定时。
    • 78. 发明申请
    • Solid-state imaging device capable of improving sensitivity without causing rise in depletion voltage and shutter voltage
    • 能够提高灵敏度而不引起耗尽电压和快门电压上升的固态成像装置
    • US20010042875A1
    • 2001-11-22
    • US09819474
    • 2001-03-28
    • Toshio Yoshida
    • H01L027/148H01L029/768H01L031/062
    • H01L27/14698H01L27/14806
    • A high-concentration light-receiving N-layer 32 is formed by ion implantation in a region near a substrate surface, and a low-concentration N-type epitaxial layer 25 is formed by epitaxial growth in a deeper region. The depletion layer of a photodiode is thus expanded to a deep portion of the substrate by the low-concentration N-type region 25, by which a photoelectric conversion effect on incident light of a long wavelength is increased to improve sensitivity. In the above stage, a deepest potential portion is formed on the substrate surface side. Therefore, a depletion voltage can be prevented from rising. Further, an intermediate-concentration N-type epitaxial layer 23 and a high-concentration N-type epitaxial layer 22 are formed in a stack of two layers by epitaxial growth in a region deeper than a region in which a first P-type layer 24, or a barrier region is formed, by which a shutter voltage can be prevented from rising. Thus, sensitivity is improved without causing a rise in the depletion voltage and shutter voltage.
    • 通过在衬底表面附近的区域中的离子注入形成高浓度的光接收N层32,并且通过在较深的区域中外延生长形成低浓度的N型外延层25。 因此,通过低浓度N型区域25将光电二极管的耗尽层扩展到衬底的深部,由此增加对长波长的入射光的光电转换效果以提高灵敏度。 在上述阶段,在基板表面侧形成最深的电位部分。 因此,可以防止耗尽电压上升。 此外,中间浓度N型外延层23和高浓度N型外延层22通过在比第一P型层24的区域更深的区域中进行外延生长而形成为两层的叠层 ,或者形成阻挡区域,由此可以防止快门电压上升。 因此,提高灵敏度,而不会导致耗尽电压和快门电压的升高。