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    • 2. 发明授权
    • Method for manufacturing split-gate flash memory cell
    • 分闸式闪存单元的制造方法
    • US6143606A
    • 2000-11-07
    • US61618
    • 1998-04-16
    • Ling-Sung WangKo-Hsing Chang
    • Ling-Sung WangKo-Hsing Chang
    • H01L21/8247H01L27/115H01L29/788H01L29/792H01L21/336H01L21/4763
    • H01L27/115H01L27/11521
    • In this method for manufacturing a split-gate flash memory cell, a floating gate and a control gate are formed over a substrate, and then first spacers are formed on the sidewalls of the gate structure. Next, a polysilicon layer is deposited over the gate structure and the substrate, and second spacers are formed on the sidewalls of the polysilicon layer. A self-aligned ion implantation process is performed, using the second spacers as a mask, implanting ions into the semiconductor substrate to form a drain region. This maintains the channel length. After removing the second spacers, another ion implantation process is performed to create a source region in the semiconductor substrate. During the second implantation, the polysilicon layer offers some protection for the semiconductor substrate, maintaining the capacity for tunneling. Finally, a conductive layer is formed over the polysilicon layer, and the conductive layer combined with the polysilicon layer forms the select gate.
    • 在用于制造分离栅极闪存单元的方法中,在衬底上形成浮栅和控制栅极,然后在栅极结构的侧壁上形成第一间隔物。 接下来,在栅极结构和衬底上沉积多晶硅层,并且在多晶硅层的侧壁上形成第二间隔物。 执行自对准离子注入工艺,使用第二间隔物作为掩模,将离子注入到半导体衬底中以形成漏极区。 这保持通道长度。 在去除第二间隔物之后,执行另一离子注入工艺以在半导体衬底中产生源区。 在第二次注入期间,多晶硅层为半导体衬底提供了一些保护,保持了隧道的容量。 最后,在多晶硅层上形成导电层,与多晶硅层结合的导电层形成选择栅极。
    • 7. 发明授权
    • Self-aligned fabricating process and structure of source line of etox flash memory
    • 自动对准制造工艺和etox闪存源线结构
    • US06524909B1
    • 2003-02-25
    • US09494524
    • 2000-01-31
    • Ling-Sung WangJyh-Ren Wu
    • Ling-Sung WangJyh-Ren Wu
    • H01L21336
    • H01L27/11521H01L21/28273
    • A self-aligned fabricating process and a structure of ETOX flash memory. A plurality of parallel lines for device isolation is formed in a substrate, and then forming a plurality of parallel stacked gates above the substrate. The device isolation lines and the stacked gates are perpendicular to each other. A plurality of first insulation layers is formed such that an insulation layer is formed over each stacked gate. Spacers are also formed over the sidewalls of each stacked gate. A plurality of source arrays and drain arrays are formed in the substrate between neighboring stacked gates. The source and drain arrays are parallel to the stacked gates, with a source array and a drain array formed in alternating positions between the stacked gates. Each source array comprises a plurality of source-doped regions located between the device isolation lines respectively. Similarly, each drain array has a plurality of drain-doped regions located between the device isolation lines. A plurality of source lines is formed in the space between neighboring spacers above the source array.
    • 自对准制造工艺和ETOX闪存的结构。 在衬底中形成用于器件隔离的多条平行线,然后在衬底上形成多个平行的堆叠栅极。 器件隔离线和堆叠栅极彼此垂直。 形成多个第一绝缘层,使得在每个堆叠的栅极上形成绝缘层。 隔板也形成在每个堆叠门的侧壁上。 在相邻堆叠栅极之间的衬底中形成多个源极阵列和漏极阵列。 源极和漏极阵列平行于堆叠栅极,源极阵列和漏极阵列形成在堆叠栅极之间的交替位置。 每个源极阵列分别包括位于器件隔离线之间的多个源极掺杂区域。 类似地,每个漏极阵列具有位于器件隔离线之间的多个漏极掺杂区域。 在源阵列上方的相邻间隔物之间​​的空间中形成多条源极线。
    • 9. 发明授权
    • Method of fabricating a flash memory
    • 制造闪速存储器的方法
    • US6146946A
    • 2000-11-14
    • US417393
    • 1999-10-13
    • Ling-Sung WangJyh-Ren Wu
    • Ling-Sung WangJyh-Ren Wu
    • H01L21/28H01L29/423H01L29/51H01L21/336
    • H01L29/511H01L21/28273H01L29/42324
    • The invention describes a method of fabricating an integrated circuit used to prevent undercutting of an oxide layer due to wet etching. A semiconductor substrate has a gate formed thereon. A conformal oxide layer is formed to cover the gate. Then, a nitrogen ion implantation process is performed to introduce nitrogen ions into the surface of the conformal oxide layer. A high temperature thermal oxidation is performed in order to form Si--N bonds, that is, the nitrogen ions bonding with the silicon atoms of the conformal oxide layer, or to form Si--ON bonds, that is, the nitrogen ions bonding with the oxygen atoms of the conformal oxide layer. A dielectric layer, which covers the conformal oxide layer, is formed. Thereafter, the dielectric layer is etched back to form spacers on the sidewalls of the gate. A wet etching process is performed to remove a part of the conformal oxide layer exposed by the spacers.
    • 本发明描述了一种制造集成电路的方法,该集成电路用于防止由于湿蚀刻而导致的氧化层的底切。 半导体衬底具有形成在其上的栅极。 形成保形氧化物层以覆盖栅极。 然后,进行氮离子注入工艺以将氮离子引入保形氧化物层的表面。 进行高温热氧化以形成Si-N键,即与保形氧化物层的硅原子结合的氮离子,或者形成Si-ON键,即氮离子与 保形氧化物层的氧原子。 形成覆盖保形氧化物层的电介质层。 此后,电介质层被回蚀以在栅极的侧壁上形成间隔物。 执行湿蚀刻工艺以去除由间隔物暴露的一部分共形氧化物层。