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    • 1. 发明授权
    • Transistor fabrication method using dielectric protection layers to
eliminate emitter defects
    • 使用介质保护层消除发射极缺陷的晶体管制造方法
    • US5523244A
    • 1996-06-04
    • US359102
    • 1994-12-19
    • Truc Q. VuMaw-Rong ChinMei F. Li
    • Truc Q. VuMaw-Rong ChinMei F. Li
    • H01L21/331H01L29/423H01L21/265H01L49/00
    • H01L29/66272H01L29/42304Y10S148/01Y10S148/124
    • A method for fabricating a super self-aligned bipolar junction transistor which reduces or eliminates emitter defects caused during critical etching steps by providing a non-critically thick dielectric etch stop (protection) layer (116) during all potentially damaging etching steps. An oxide or other dielectric layer (116, 130), is provided above the emitter region (152) of the semiconductor surface (110) during potentially damaging etching steps, such as dry etch procedures used to form critical device structures such as emitter opening 124 and sidewall spacers 146. Non-damaging etching procedures, such as wet etching, are used to remove dielectric protection layers (116, 130) to form less critical device structures, and/or form intermediate layer openings without damaging the silicon surface in the emitter (152), or other critical regions. The dielectric etch stop (protection) layers (116, 130) are non-critically thick and are fully removed from above an extrinsic base region (142) of the device by wet etching before forming the emitter (152) and base regions (142, 144). The method results in a more uniform, lower resistance base connection, higher chip yields, more uniform device properties, and greater device reliability.
    • 一种用于制造超自对准双极结型晶体管的方法,其通过在所有可能有害的蚀刻步骤期间提供非临界厚的电介质蚀刻停止(保护)层(116)来减少或消除在临界蚀刻步骤期间引起的发射极缺陷。 在潜在有害的蚀刻步骤期间,例如用于形成关键器件结构的干式蚀刻工艺(例如发射极开口124),在半导体表面(110)的发射极区域(152)的上方提供氧化物或其它电介质层(116,130) 使用诸如湿式蚀刻的非破坏性蚀刻方法来去除介电保护层(116,130)以形成不太关键的器件结构,和/或形成中间层开口,而不会损坏发射极中的硅表面 (152)或其他关键区域。 电介质蚀刻停止(保护)层(116,130)在形成发射极(152)和基极区域(142)之前通过湿式蚀刻而非临界厚并且通过湿蚀刻完全从器件的非本征基极区域(142) 144)。 该方法导致更均匀,更低电阻基极连接,更高的芯片产量,更均匀的器件性能和更大的器件可靠性。
    • 3. 发明授权
    • Method for fabricating gate structure for nonvolatile memory device
comprising an EEPROM and a latch transistor
    • 一种用于制造包括EEPROM和锁存晶体管的非易失性存储器件的栅极结构的方法
    • US5578515A
    • 1996-11-26
    • US554220
    • 1995-11-06
    • Chen-Chi P. ChangMei F. LiTruc Q. Vu
    • Chen-Chi P. ChangMei F. LiTruc Q. Vu
    • H01L21/8247
    • H01L27/11526H01L27/11546
    • The gate structure for a nonvolatile memory device comprising an EEPROM and a latch transistor is fabricated on a substrate by patterning the EEPROM's floating gate in a first polysilicon layer, patterning the EEPROM's control gate over the floating gate in a second polysilicon layer, and then collectively patterning the second and first layers to form the latch transistor's stacked gate. The stacked gate includes a thin gate that is electrically connected to the EEPROM floating gate and a protective layer over and electrically isolated from the thin gate. The stacked gate design eliminates unwanted polysilicon spacers between the latch transistor's channel and its drain and source regions, which improves the control of the memory device. The protective layer prevents ion penetration during the implantation of the latch transistor's drain and source regions. The fabrication process and thinness of the latch transistor gate improve the linewidth control of other transistors formed on the substrate and the latch transistor by avoiding overetching and reducing the normal etching time for the latch gate, respectively.
    • 包括EEPROM和锁存晶体管的非易失性存储器件的栅极结构通过在第一多晶硅层中构图EEPROM的浮置栅极而在第二多晶硅层上在浮动栅极上图案化EEPROM的控制栅极,然后集中 图案化第二层和第一层以形成锁存晶体管的堆叠栅极。 堆叠栅极包括电连接到EEPROM浮置栅极的薄栅极和与薄栅极电隔离的保护层。 堆叠栅极设计消除了锁存晶体管沟道与漏极和源极区之间的不必要的多晶硅间隔物,从而改善了存储器件的控制。 保护层在锁存晶体管的漏极和源极区域的注入期间防止离子穿透。 锁存晶体管栅极的制造工艺和薄度分别通过避免过蚀刻和减小锁存栅的正常蚀刻时间来改善形成在衬底和锁存晶体管上的其它晶体管的线宽控制。
    • 4. 发明授权
    • Nonvolatile memory device
    • 非易失性存储器件
    • US5652448A
    • 1997-07-29
    • US691475
    • 1996-08-02
    • Chen-Chi Peter ChangMei F. LiTruc Q. Vu
    • Chen-Chi Peter ChangMei F. LiTruc Q. Vu
    • H01L21/8247H01L29/76
    • H01L27/11526H01L27/11546
    • The gate structure for a nonvolatile memory device comprising an EEPROM and a latch transistor is fabricated on a substrate by patterning the EEPROM's floating gate in a first polysilicon layer, patterning the EEPROM's control gate over the floating gate in a second polysilicon layer, and then collectively patterning the second and first layers to form the latch transistor's stacked gate. The stacked gate includes a thin gate that is electrically connected to the EEPROM floating gate and a protective layer over and electrically isolated from the thin gate. The stacked gate design eliminates unwanted polysilicon spacers between the latch transistor's channel and its drain and source regions, which improves the control of the memory device. The protective layer prevents ion penetration during the implantation of the latch transistor's drain and source regions. The fabrication process and thinness of the latch transistor gate improve the linewidth control of other transistors formed on the substrate and the latch transistor by avoiding overetching and reducing the normal etching time for the latch gate, respectively.
    • 包括EEPROM和锁存晶体管的非易失性存储器件的栅极结构通过在第一多晶硅层中构图EEPROM的浮置栅极而在第二多晶硅层上在浮动栅极上图案化EEPROM的控制栅极,然后集中 图案化第二层和第一层以形成锁存晶体管的堆叠栅极。 堆叠栅极包括电连接到EEPROM浮置栅极的薄栅极和与薄栅极电隔离的保护层。 堆叠栅极设计消除了锁存晶体管沟道与漏极和源极区之间的不必要的多晶硅间隔物,从而改善了存储器件的控制。 保护层在锁存晶体管的漏极和源极区域的注入期间防止离子穿透。 锁存晶体管栅极的制造工艺和薄度分别通过避免过蚀刻和减小锁存栅的正常蚀刻时间来改善形成在衬底和锁存晶体管上的其它晶体管的线宽控制。