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    • 121. 发明授权
    • Process for creating a metal etch mask which may be utilized for
halogen-plasma excavation of deep trenches
    • 用于制造可用于深沟槽的卤素等离子体挖掘的金属蚀刻掩模的方法
    • US5001085A
    • 1991-03-19
    • US554630
    • 1990-07-17
    • David A. CatheyTrung T. Doan
    • David A. CatheyTrung T. Doan
    • H01L21/3065H01L21/308
    • H01L21/3081H01L21/3065Y10S148/105Y10S438/945
    • A process for creating a metal etch mask from either cobalt, nickel, palladium, iron or copper which may be utilized for halogen-plasma excavation of deep trenches. The process begins by creating a thin isolation layer of either silicon nitride or silicon dioxide on top of the layer to be trenched. A thin layer of one of the metals selected from the aforementioned list of five is then created on top of the isolation layer. A layer of polysilicon is then blanket deposited on top of the refractory metal layer. Photoresist masking is then performed as though the photoresist were the actual pattern for the trench etch. Exposed portions of the polysilicon layer are then etched away with an anisotropic etch. Following a photoresist strip, the substrate and overlying layers are subjected to an elevated temperature step, which causes the polysilicon to react with the underlying metal layer to form metal silicide. In substrate regions where no polysilicon overlies the metal layer, no silicide is formed. Next, the metal silicide is removed with a wet etch. A metal mask remains that is essentially an exact image of the original photoresist mask. Trenches may be etched to any desired depth with virtually no consumption of the metal mask. Once the trench etch is complete, the metal etch mask may be stripped utilizing a wet etch reagent such as aqua regia.
    • 用于从钴,镍,钯,铁或铜制造金属蚀刻掩模的方法,其可用于深沟槽的卤素等离子体挖掘。 该过程开始于在待沟槽的层的顶部上形成氮化硅或二氧化硅的薄隔离层。 然后在隔离层的顶部上形成从上述五个列表中选出的金属之一的薄层。 然后将多晶硅层覆盖在难熔金属层的顶部。 然后进行光刻胶掩模,就像光致抗蚀剂是沟槽蚀刻的实际图案一样。 然后用各向异性蚀刻蚀刻掉多晶硅层的暴露部分。 在光致抗蚀剂条之后,使衬底和覆盖层经受高温步骤,这使得多晶硅与下面的金属层反应形成金属硅化物。 在没有多晶硅覆盖金属层的衬底区域中,不形成硅化物。 接下来,用湿蚀刻去除金属硅化物。 残留的金属掩模基本上是原始光刻胶掩模的精确图像。 沟槽可以蚀刻到任何所需的深度,几乎不消耗金属掩模。 一旦沟槽蚀刻完成,就可以使用湿蚀刻剂如王水去除金属蚀刻掩模。
    • 125. 发明授权
    • Methods and apparatuses for radio frequency identification (RFID) tags configured to allow antenna trim
    • 用于射频识别(RFID)标签的方法和装置,其被配置为允许天线修整
    • US07812728B2
    • 2010-10-12
    • US11845308
    • 2007-08-27
    • David A. Cathey
    • David A. Cathey
    • G08B13/14
    • H01Q1/2208G06K19/0723G06K19/0726G06K19/07749H01Q1/2225H01Q9/30
    • A radio frequency communication device and method are disclosed. In one aspect, an RFID tag includes an adjustable antenna having a main segment and one or more additional segments that are short relative to the main segment; and the antenna is adjustable to electrically isolate one or more of the additional segments from the main segment. In another aspect, an RFID tag includes an antenna having a first section and a second section short relative to the first section; and the antenna is adjustable to disconnect the first and second sections from each other at a predetermined location. In a further aspect, an RFID tag includes an antenna having a first section and a second section; and the first section is adjustable to decrease the first length of the first section and the second section adjustable to increase the second length of the second section.
    • 公开了射频通信装置和方法。 在一个方面,RFID标签包括可调节天线,其具有主段和相对于主段短的一个或多个附加段; 并且天线是可调节的,以将一个或多个附加段与主段电隔离。 另一方面,RFID标签包括具有相对于第一部分缩短的第一部分和第二部分的天线; 并且天线是可调节的,以在预定位置彼此断开第一和第二部分。 另一方面,RFID标签包括具有第一部分和第二部分的天线; 并且第一部分可调节以减小第一部分的第一长度,并且第二部分可调节以增加第二部分的第二长度。