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    • 62. 发明申请
    • Methods to form electronic devices and methods to form a material over a semiconductive substrate
    • 形成电子器件的方法和在半导体衬底上形成材料的方法
    • US20060166431A1
    • 2006-07-27
    • US11391650
    • 2006-03-27
    • Randhir Thakur
    • Randhir Thakur
    • H01L21/8244
    • H01L21/0217C23C16/345H01L21/02129H01L21/02164H01L21/022H01L21/02211H01L21/02274H01L21/02326H01L21/02337H01L21/3144H01L21/3145H01L21/3185H01L27/10852H01L28/40
    • A first electrode and a doped oxide layer laterally proximate thereof are provided over a substrate. A silicon nitride layer is formed over both the doped oxide layer and the first electrode to a thickness of no greater than 80 Angstroms over at least the first electrode by low pressure chemical vapor deposition using feed gases comprising a silicon hydride, H2 and ammonia. The substrate with silicon nitride layer is exposed to oxidizing conditions comprising at least 700° C. to form a silicon dioxide layer over the silicon nitride layer, with the thickness of silicon nitride over the doped oxide layer being sufficient to shield oxidizable substrate material beneath the doped oxide layer from oxidizing during the exposing. A second electrode is formed over the silicon dioxide layer and the first electrode. In one implementation, the chemical vapor depositing comprises feed gases of a silicon hydride and ammonia, with the depositing comprising increasing internal reactor temperature from below 500° C. to a maximum deposition temperature above 600° C. and starting feed of the silicon hydride into the reactor at a temperature less than or equal to 600° C. In one implementation the depositing comprises increasing internal reactor temperature from below 500° C. to a maximum deposition temperature above 600° C. using a temperature ramp rate of at least 10° C./minute from at least 500° C. to at least 600° C. Other aspects and implementations are described.
    • 第一电极和其侧向附近的掺杂氧化物层设置在衬底上。 通过低压化学气相沉积,使用包含氢化硅H 2的进料气体,在掺杂氧化物层和第一电极之上形成氮化硅层至少在第一电极上不大于80埃的厚度 和氨。 具有氮化硅层的衬底暴露于包括至少700℃的氧化条件,以在氮化硅层上方形成二氧化硅层,掺杂氧化物层上的氮化硅厚度足以将可氧化的衬底材料屏蔽在 掺杂的氧化物层在曝光期间被氧化。 在二氧化硅层和第一电极上形成第二电极。 在一个实施方案中,化学气相沉积包括氢化硅和氨的进料气体,沉积物包括将内部反应器温度从低于500℃增加至高于600℃的最大沉积温度,并将硅氢化物的原料进料 反应器的温度低于或等于600℃。在一个实施方案中,沉积包括使内部反应器温度从低于500℃增加至高于600℃的最大沉积温度,使用至少10°的温度升温速率 从至少500℃至至少600℃的/分钟。其他方面和实施方式进行了描述。