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    • 9. 发明授权
    • Electrically programmable antifuses and methods for forming the same
    • 电子可编程反熔丝及其形成方法
    • US06388305B1
    • 2002-05-14
    • US09466495
    • 1999-12-17
    • Claude L. BertinErik L. HedbergRussell J. HoughtonMax G. LevyRick L. MohlerWilliam R. TontiWayne M. Trickle
    • Claude L. BertinErik L. HedbergRussell J. HoughtonMax G. LevyRick L. MohlerWilliam R. TontiWayne M. Trickle
    • H01L2900
    • H01L21/763H01L23/5252H01L27/10861H01L27/10894H01L2924/0002H01L2924/00
    • A first one time, voltage programmable logic element is provided in a semiconductor substrate of first conductivity type that comprises a first layer beneath a surface of the substrate, the first layer having a second conductivity type; and a trench formed through the surface and passing through the first layer. The trench comprises an interior surface, a dielectric material lining the interior surface and a conductive material filling the lined trench. The first logic element is configured so that a predetermined voltage or higher applied between the conductive material and the first layer causes a breakdown within a region of the trench. A second one time, voltage programmable logic element is provided in a semiconductor substrate of first conductivity type that comprises a first layer formed in a surface of the substrate, the first layer having a second conductivity type; and a trench formed through the surface and passing through the first layer. The trench comprises an interior surface, a first dielectric material lining the interior surface and a second dielectric material filling the lined trench. The second logic element further comprises a dielectric layer formed over a portion of the first layer and contacting the first dielectric material lining the trench at a merge location; and an electrode extending over a portion of both the dielectric layer and the filled trench. The second logic element is configured so that a predetermined voltage or higher applied between the electrode and the first layer causes a breakdown near the merge location.
    • 首先,电压可编程逻辑元件设置在第一导电类型的半导体衬底中,该第一导电类型的半导体衬底包括在衬底的表面下面的第一层,第一层具有第二导电类型; 以及通过表面形成并穿过第一层的沟槽。 沟槽包括内表面,衬在内表面的电介质材料和填充衬里沟槽的导电材料。 第一逻辑元件被配置为使得施加在导电材料和第一层之间的预定电压或更高的电压导致沟槽区域内的击穿。 第二次,电压可编程逻辑元件设置在第一导电类型的半导体衬底中,该半导体衬底包括形成在衬底的表面中的第一层,第一层具有第二导电类型; 以及通过表面形成并穿过第一层的沟槽。 沟槽包括内表面,衬在内表面的第一电介质材料和填充衬里沟槽的第二电介质材料。 第二逻辑元件还包括形成在第一层的一部分上并且在合并位置处接触衬套在沟槽上的第一介电材料的电介质层; 以及在电介质层和填充沟槽的一部分上延伸的电极。 第二逻辑元件被配置为使得施加在电极和第一层之间的预定电压或更高的电压导致合并位置附近的击穿。