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    • 6. 发明申请
    • SPLIT-CHANNEL ANTIFUSE ARRAY ARCHITECTURE
    • 分裂通道抗体阵列架构
    • WO2005109516A1
    • 2005-11-17
    • PCT/CA2005/000701
    • 2005-05-06
    • SIDENSE CORP.KURJANOWICZ, Wlodek
    • KURJANOWICZ, Wlodek
    • H01L29/66
    • H01L21/28211G11C17/16G11C17/18H01L23/5252H01L27/10H01L27/101H01L27/112H01L27/11206H01L29/42368H01L29/4238H01L29/42384H01L29/7833H01L2924/0002H01L2924/00
    • Generally, the present invention provides a variable thickness gate oxide anti-fuse transistor device that can be employed in a non-volatile, one-time-programmable (OTP) memory array application. The anti-fuse transistor can be fabricated with standard CMOS technology, and is configured as a standard transistor element having a source diffusion, gate oxide, polysilicon gate and optional drain diffusion. The variable gate oxide underneath the polysilicon gate consists of a thick gate oxide region and a thin gate oxide region, where the thin gate oxide region acts as a localized breakdown voltage zone. A conductive channel between the polysilicon gate and the channel region can be formed in the localized breakdown voltage zone during a programming operation. In a memory array application, a wordline read current applied to the polysilicon gate can be sensed through a bitline connected to the source diffusion, via the channel of the anti-fuse transistor. More specifically, the present invention provides an effective method for utilizing split channel MOS structures as an anti-fuse cell suitable for OTP memories.
    • 通常,本发明提供了一种可变厚度的栅氧化物反熔丝晶体管器件,其可以用在非易失性的一次可编程(OTP)存储器阵列应用中。 反熔丝晶体管可以用标准CMOS技术制造,并且被配置为具有源极扩散,栅极氧化物,多晶硅栅极和任选的漏极扩散的标准晶体管元件。 多晶硅栅极下方的可变栅极氧化物由厚栅极氧化物区域和薄栅极氧化物区域组成,其中薄栅极氧化物区域用作局部击穿电压区域。 在编程操作期间,可以在局部击穿电压区域中形成多晶硅栅极和沟道区域之间的导电沟道。 在存储器阵列应用中,可以经由反熔丝晶体管的沟道通过连接到源极扩散的位线来感测施加到多晶硅栅极的字线读取电流。 更具体地,本发明提供了一种利用分裂沟道MOS结构作为适用于OTP存储器的反熔丝单元的有效方法。