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    • 1. 发明申请
    • SELF-ALIGNED NAND FLASH SELECT-GATE WORDLINES FOR SPACER DOUBLE PATTERNING
    • 自对准NAND闪存选择门字幕用于双面格式
    • WO2012083147A3
    • 2012-10-04
    • PCT/US2011065442
    • 2011-12-16
    • SPANSION LLCCHEN TUNG-SHENGFANG SHENQING
    • CHEN TUNG-SHENGFANG SHENQING
    • H01L21/027
    • H01L21/302H01L21/0337H01L21/0338H01L21/32139H01L27/11519H01L27/11524H01L27/11565H01L27/1157
    • A method for double patterning is disclosed. In one embodiment the formation a pair of select gate wordlines on either side of a plurality of core wordlines begins by placing a spacer pattern around edges of a photoresist pattern is disclosed. The photoresist pattern is stripped away leaving the spacer pattern. A trim mask is placed over a portion of the spacer pattern. Portions of the spacer pattern are etched away that are not covered by the trim mask. The trim mask is removed, wherein first remaining portions of the spacer pattern define a plurality of core wordlines. A pad mask is placed such that the pad mask and second remaining portions of the spacer pattern define a select gate wordline on either side of the plurality of core wordlines. Finally at least one pattern transfer layer is etched through using the mad mask and the first and second remaining portions of the spacer pattern to etch the select gate wordlines and the plurality of core wordlines into a poly silicon layer.
    • 公开了一种用于双重图案化的方法。 在一个实施例中,通过在光致抗蚀剂图案的边缘周围放置间隔图案来开始在多个核心字线的任一侧上形成一对选择栅极字线。 将光致抗蚀剂图案剥离留下间隔图案。 修剪掩模放置在间隔图案的一部分上。 间隔图案的部分被蚀刻掉,不被修剪掩模覆盖。 去除修剪掩模,其中间隔图案的第一剩余部分限定多个核心字线。 放置焊盘掩模,使得焊盘掩模和间隔物图案的第二剩余部分在多个核心字线的任一侧上限定选择栅极字线。 最后,通过使用激光掩模和间隔物图案的第一和第二剩余部分来蚀刻至少一个图案转印层,以将选择栅极字线和多个核心字线蚀刻成多晶硅层。
    • 3. 发明申请
    • PROCESS MARGIN ENGINEERING IN CHARGE TRAPPING FIELD EFFECT TRANSISTORS
    • 电荷捕捉场效应晶体管的过程工程
    • WO2012087974A3
    • 2012-08-23
    • PCT/US2011065923
    • 2011-12-19
    • SPANSION LLCCHEN TUNG-SHENGFANG SHENQING
    • CHEN TUNG-SHENGFANG SHENQING
    • H01L21/336H01L29/78
    • H01L21/76232H01L21/28282H01L27/1157H01L29/792
    • Embodiments of the present technology arc directed toward charge trapping region process margin engineering for charge trapping field effect transistor. The techniques include forming a plurality of shallow trench isolation regions on a substrate, wherein the tops of the shallow trench isolation regions extend above the substrate by a given amount. A portion of the substrate is oxidized to form a tunneling dielectric region. A first set of one or more nitride layers are deposited on the tunneling dielectric region and shallow trench isolation regions, wherein a thickness of the first set of nitride layers is approximately half of the given amount that the tops of the shallow trench isolation regions extend above the substrate. A portion of the first set of nitride layers is etched back to the tops of the trench isolation regions. A second set of one or more nitride layers is deposited on the etched back first set of nitride layers. The second set of nitride layers is oxidized to form a charge trapping region on the tunneling dielectric region and a blocking dielectric region on the charge trapping region. A gate region is then deposited on the blocking dielectric region.
    • 本技术的实施例针对电荷捕获场效应晶体管的电荷捕获区域工艺裕度工程。 这些技术包括在衬底上形成多个浅沟槽隔离区域,其中浅沟槽隔离区域的顶部在衬底上延伸给定量。 衬底的一部分被氧化以形成隧道电介质区域。 第一组一个或多个氮化物层沉积在隧道电介质区域和浅沟槽隔离区域上,其中第一组氮化物层的厚度约为给定量的一半,即浅沟槽隔离区的顶部在上面延伸 底物。 第一组氮化物层的一部分被回蚀刻到沟槽隔离区的顶部。 在蚀刻后的第一组氮化物层上沉积第二组一个或多个氮化物层。 第二组氮化物层被氧化以在隧穿电介质区域上形成电荷捕捉区域,并在电荷俘获区域上形成阻挡电介质区域。 然后将栅极区域沉积在阻挡电介质区域上。