Method of implanting during manufacture of ROM device
    11.
    发明授权
    Method of implanting during manufacture of ROM device 失效
    在ROM设备制造过程中植入的方法

    公开(公告)号:US5429975A

    公开(公告)日:1995-07-04

    申请号:US140401

    申请日:1993-10-25

    CPC classification number: H01L27/1126 H01L27/112

    Abstract: A ROM device with an array of cells and a method of manufacturing comprises: forming closely spaced conductors in the surface of a semiconductor substrate having a second type of background impurity. Insulation is formed on the substrate. Closely spaced, parallel, conductors on the insulation are arranged orthogonally to the line regions. Glass insulation is formed over the conductors. Reflowing the glass insulation, forming contacts and forming a metal layer on the glass insulation follow. A resist is formed, exposed forming a resist metal pattern, then etching through the resist to pattern metal and removing the resist. Depositing a resist onto the patterned metal, and exposing the second resist with a custom code pattern, developing the resist into a mask follow. Impurity ions are implanted into the substrate adjacent to the conductors through the openings in a second resist layer. The device is passivated followed by activating the implanted impurity ions by annealing the device at a temperature less than or equal to about 520.degree. C. in a forming gas or N.sub.2 atmosphere.

    Abstract translation: 具有单元阵列的ROM器件和制造方法包括:在具有第二类背景杂质的半导体衬底的表面中形成紧密间隔的导体。 在基板上形成绝缘体。 绝缘体上紧密间隔开的平行导体与线路区域正交配置。 在导体上形成玻璃绝缘体。 玻璃绝缘回流,形成接触并在玻璃绝缘上形成金属层。 形成抗蚀剂,暴露形成抗蚀剂金属图案,然后通过抗蚀剂蚀刻图案金属并除去抗蚀剂。 将抗蚀剂沉积到图案化的金属上,并用定制代码图案曝光第二抗蚀剂,将抗蚀剂显影成掩模。 通过第二抗蚀剂层中的开口将杂质离子注入邻近导体的衬底中。 钝化该器件,然后在形成气体或N 2气氛中,在小于或等于约520℃的温度下对器件进行退火来激活注入的杂质离子。

    Semiconductor read-only memory device and method of fabricating the same
    14.
    发明授权
    Semiconductor read-only memory device and method of fabricating the same 有权
    半导体只读存储器件及其制造方法

    公开(公告)号:US06350654B1

    公开(公告)日:2002-02-26

    申请号:US09215618

    申请日:1998-12-17

    CPC classification number: H01L27/1126 H01L27/105 H01L27/11293

    Abstract: A semiconductor read-only memory (ROM) and a method of fabricating the same are provided. The ROM device is structured in such a manner that allows the fabrication to include a fewer number of mask processes. This makes it more cost effective and allows a cycle time that is shorter than that of the prior art. Moreover, the particular structure of the ROM device makes punchthrough less likely to occur between any neighboring pairs of the buried bit lines when the ROM device is further scaled down. The ROM device is constructed on a semiconductor substrate which is partitioned into a peripheral region and a cell region. A plurality of STI structures are formed at predefined locations in both the peripheral region and the cell region. Immediately after this, a first ion-implantation process can be performed on the cell region to form a plurality of buried bit lines. Subsequently, the dielectric isolation layers in all of the STI structures in the cell region are removed, leaving a plurality of empty trenches behind. A conformal insulating layer and a conductive layer are then successively formed over the wafer, and the conductive layer is further selectively removed to form a word line in the cell region and a gate in the peripheral region. In the code implantation process, selected channel regions between the buried bit lines are doped with impurities for code implantation of data into the ROM device.

    Abstract translation: 提供半导体只读存储器(ROM)及其制造方法。 ROM器件以允许制造包括更少数量的掩模处理的方式构造。 这使得它更具成本效益并且允许比现有技术更短的循环时间。 此外,当ROM器件进一步缩小时,ROM器件的特定结构使得在任何相邻的掩埋位线对之间不太可能发生穿透。 ROM器件被构造在被划分成周边区域和单元区域的半导体衬底上。 在周边区域和单元区域中的预定位置处形成多个STI结构。 此后,可以在单元区域上进行第一离子注入工艺以形成多个掩埋位线。 随后,去除单元区域中所有STI结构中的介电隔离层,留下多个空槽。 然后在晶片上连续地形成保形绝缘层和导电层,并且进一步选择性地去除导电层,以在单元区域中形成字线,并在外围区域形成栅极。 在代码注入过程中,掩埋位线之间的选定沟道区域掺杂有用于将数据代码注入到ROM器件中的杂质。

    Post-titanium nitride mask ROM programming method
    15.
    发明授权
    Post-titanium nitride mask ROM programming method 失效
    后氮化钛掩模ROM编程方法

    公开(公告)号:US5488009A

    公开(公告)日:1996-01-30

    申请号:US344004

    申请日:1994-11-23

    CPC classification number: H01L27/1126 H01L27/112 Y10S257/915

    Abstract: A method of manufacturing a code pattern on a semiconductor substrate with an array of substantially parallel buried bit lines integral therewith and with word lines above the buried bit lines, includes: forming a titanium nitride layer above the word lines, forming and patterning a code mask above the titanium nitride layer, implanting impurities into the substrate through openings in the code mask to form the code pattern, and performing rapid thermal annealing of the implant. The step height of the titanium nitride layer is employed to form the code identification on the substrate.

    Abstract translation: 一种在半导体衬底上制造具有与其一体的基本上平行的掩埋位线阵列和掩埋位线之上的字线的阵列的方法,包括:在字线之上形成氮化钛层,形成码图掩模 在氮化钛层之上,通过编码掩模中的开口将杂质注入到衬底中,以形成编码图案,并对植入物进行快速热退火。 氮化钛层的台阶高度用于在基板上形成代码识别。

    Device under test array for identifying defects
    16.
    发明授权
    Device under test array for identifying defects 有权
    用于识别缺陷的被测设备

    公开(公告)号:US07859285B2

    公开(公告)日:2010-12-28

    申请号:US12145518

    申请日:2008-06-25

    CPC classification number: G01R31/2884 G01R31/2831

    Abstract: A device under test (DUT) array provides defect information rapidly and systematically. The DUT array includes a plurality of test units arranged in a matrix, a plurality of bit lines and a plurality of word lines. Each test unit has a first terminal and a second terminal. Each second terminal of the test unit is electrically connected to a ground point. The first terminals of the test units are electrically connected to the bit lines. The word lines are coupled to the test units. Defects in the each test unit can be identified by providing voltages to the bit lines and the word lines. Accordingly, defects in various devices of an integrated circuit can be detected rapidly and systematically by applying signals to the DUT array.

    Abstract translation: 被测器件(DUT)阵列快速有系统地提供缺陷信息。 DUT阵列包括以矩阵,多个位线和多个字线布置的多个测试单元。 每个测试单元具有第一端子和第二端子。 测试单元的每个第二端子电连接到接地点。 测试单元的第一个端子电连接到位线。 字线耦合到测试单元。 可以通过向位线和字线提供电压来识别每个测试单元中的缺陷。 因此,可以通过向DUT阵列施加信号来快速且系统地检测集成电路的各种装置中的缺陷。

    Variable work function transistor high density mask ROM
    17.
    发明授权
    Variable work function transistor high density mask ROM 有权
    可变功函数晶体管高密度掩膜ROM

    公开(公告)号:US06417548B1

    公开(公告)日:2002-07-09

    申请号:US09356679

    申请日:1999-07-19

    CPC classification number: H01L27/11233 H01L27/1052 H01L27/112

    Abstract: A mask ROM stores information by selecting the work function of the gates of each FET in an array of FETs. The polysilicon gates of some of the FETs are doped N-type and the gates of the other FETs are doped P-type to form gates having different work functions, thereby forming FETs having different threshold voltages. The ROM consists of a parallel array of buried N+ bit lines formed in the substrate, a gate oxide layer deposited over the bit lines and a layer of polysilicon deposited on the gate oxide. The polysilicon is blanket doped P-type and then an encoding mask is formed, with openings in the encoding mask exposing regions of the polysilicon to be formed into gates of FETs with low threshold voltages. Either arsenic or phosphorus is doped into the polysilicon through the mask openings. The mask is removed, a layer of conductive material such as tungsten silicide is deposited and the polysilicon and the conductive material are formed into word lines for the ROM. The word lines of the ROM serve as gates for the FETs and the bit lines serve as sources and drains for the FETs.

    Abstract translation: 掩模ROM通过选择FET阵列中每个FET的栅极的功函数来存储信息。 一些FET的多晶硅栅极被掺杂为N型,并且其它FET的栅极被掺杂P型以形成具有不同功函数的栅极,从而形成具有不同阈值电压的FET。 该ROM由在衬底中形成的掩埋N +位线的平行阵列,沉积在位线上的栅极氧化物层和沉积在栅极氧化物上的多晶硅层组成。 多晶硅是覆盖掺杂P型,然后形成编码掩模,其中编码掩模中的开口暴露多晶硅的区域,以形成具有低阈值电压的FET的栅极。 砷或磷通过掩模开口掺杂到多晶硅中。 去除掩模,沉积诸如硅化钨的导电材料层,并且将多晶硅和导电材料形成为ROM的字线。 ROM的字线用作FET的栅极,位线用作FET的源极和漏极。

    Short turn around time mask ROM process
    18.
    发明授权
    Short turn around time mask ROM process 失效
    短周转时间掩码ROM进程

    公开(公告)号:US6054353A

    公开(公告)日:2000-04-25

    申请号:US746855

    申请日:1996-11-18

    CPC classification number: H01L27/11293 H01L27/1126

    Abstract: A mask ROM stores information by selecting the work function of the gates of each FET in an array of FETs at a late stage in the manufacture of the ROM. The polysilicon gates of some of the FETs are doped N-type and the gates of the other FETs are doped P-type to form gates having different work functions, thereby forming FETs having different threshold voltages. The ROM consists of a parallel array of buried N.sup.+ bit lines formed in the substrate, a gate oxide layer deposited over the bit lines and a layer of polysilicon deposited on the gate oxide. The polysilicon is blanket doped N-type, gate electrodes are defined by photolithography, and then self-aligned silicide layers are formed on the gate electrodes. An insulating layer is then formed over the gate electrodes. Programming of the ROM is accomplished by forming a mask on the insulating layer and then implanting ions through openings in the mask, through the insulating layer and the silicide layer, and into the polysilicon layer. The implantation converts individual gate electrodes from N-type to P-type to alter the threshold voltage of the selected transistors. Relatively few additional processing steps are needed after the programming to complete the ROM.

    Abstract translation: 掩模ROM通过在ROM的制造中的晚期阶段选择FET的阵列中的每个FET的栅极的功函数来存储信息。 一些FET的多晶硅栅极被掺杂为N型,并且其它FET的栅极被掺杂P型以形成具有不同功函数的栅极,从而形成具有不同阈值电压的FET。 该ROM由在衬底中形成的掩埋N +位线的平行阵列,沉积在位线上的栅极氧化物层和沉积在栅极氧化物上的多晶硅层组成。 多晶硅是覆盖N掺杂的,栅极通过光刻法定义,然后在栅电极上形成自对准的硅化物层。 然后在栅电极上形成绝缘层。 ROM的编程通过在绝缘层上形成掩模然后通过掩模中的开口通过绝缘层和硅化物层注入离子并进入多晶硅层来实现。 注入将单个栅电极从N型转换为P型,以改变所选晶体管的阈值电压。 在编程完成ROM之后,需要较少的附加处理步骤。

    Process for fabricating a high-voltage MOSFET
    19.
    发明授权
    Process for fabricating a high-voltage MOSFET 失效
    制造高压MOSFET的工艺

    公开(公告)号:US5589411A

    公开(公告)日:1996-12-31

    申请号:US508515

    申请日:1995-07-28

    CPC classification number: H01L29/8083 H01L21/2815

    Abstract: A process for fabricating high-voltage MOSFET devices on a semiconductor substrate is disclosed. The substrate has heavily-doped impurities of a first conductivity type, and constitutes the drain region for the MOSFET. The process of fabrication comprises the steps of subsequently forming on the substrate a first doped layer, a second doped layer, a third doped layer and a shielding layer. All of these doped layers are of the first conductivity type. The second doped layer has an impurity concentration and a thickness smaller and larger than the impurity concentration and thickness respectively of the first doped layer, and larger and smaller than the impurity concentration and thickness respectively of the third doped layer. The impurity concentration of the first doped layer is smaller than the impurity concentration of the substrate. An opening in the shielding layer is formed, and then the source region of the MOSFET is formed in the area exposed by the opening. Afterwards, thermal oxidation is performed to form a field oxide layer over the surface of the source region. Next, an etching process is performed to remove the third doped layer, thereby revealing the surface of said second doped layer to form a source protruding body. Sidewalls of the source protruding body is then covered by an insulating layer. Finally, the field oxide layer and the insulating layer are then utilized as masking for implanting impurities of a second conductivity type into the second doped layer, thereby forming the gate region for the MOSFET.

    Abstract translation: 公开了一种在半导体衬底上制造高压MOSFET器件的工艺。 衬底具有第一导电类型的重掺杂杂质,并且构成MOSFET的漏极区。 制造工艺包括随后在衬底上形成第一掺杂层,第二掺杂层,第三掺杂层和屏蔽层的步骤。 所有这些掺杂层都是第一导电类型。 第二掺杂层的杂质浓度和厚度分别小于和大于第一掺杂层的杂质浓度和厚度,并且分别大于和小于第三掺杂层的杂质浓度和厚度。 第一掺杂层的杂质浓度小于衬底的杂质浓度。 形成屏蔽层中的开口,然后在由开口暴露的区域中形成MOSFET的源极区域。 之后,进行热氧化以在源区域的表面上形成场氧化物层。 接下来,进行蚀刻处理以去除第三掺杂层,从而露出所述第二掺杂层的表面以形成源突出体。 源极突出体的侧壁然后被绝缘层覆盖。 最后,将场氧化物层和绝缘层用作掩模,以将第二导电类型的杂质注入到第二掺杂层中,从而形成用于MOSFET的栅极区域。

    Metal oxide semiconductor device integral with an electro-static
discharge circuit
    20.
    发明授权
    Metal oxide semiconductor device integral with an electro-static discharge circuit 失效
    与静电放电电路集成的金属氧化物半导体器件

    公开(公告)号:US5571737A

    公开(公告)日:1996-11-05

    申请号:US280113

    申请日:1994-07-25

    CPC classification number: H01L29/66568 H01L27/0251 H01L27/0266

    Abstract: An improved structure and process of fabricating a metal oxide field effect (MOSFET) which has a high resistance to electro-static discharge. The device has pre-gate heavily doped source and drain regions which overlap the gate electrode and the source and drain regions. This improved MOSFET device with overlapping pre-gate source and drain regions is incorporated into an electro-static discharge (ESD) circuit to form a memory device which has a high resistance to electro-static discharge (ESD).The MOSFET device with pre-gate heavily doped source and drain regions can be formed as follows. Spaced pre-gate source and drain regions of a second conductivity type are formed in the substrate with a background doping of a first conductivity type. A gate oxide and a gate is formed in the regions between the pre-gate source and drain regions. The gate at least partially overhangs the pre-gate source and drain regions. Subsequently, spacers are formed on the vertical sidewalls of the gate. Source and drain regions in the substrate are formed on either side of the spacers. Next, using conventional processes, insulating and metal layers are added to connect the circuit elements and form a memory device. The device is connected to form the input and input/output ESD circuits. The combination of the device of the invention and the ESD protection circuit forms an ESD resistant circuit using a minimum number of manufacturing steps.

    Abstract translation: 改进了对静电放电具有高抗性的金属氧化物场效应(MOSFET)的制造结构和工艺。 该器件具有与栅电极和源极和漏极区重叠的预栅极重掺杂源极和漏极区。 这种具有重叠预栅极源极和漏极区域的改进的MOSFET器件被并入到静电放电(ESD)电路中,以形成具有高抗静电放电(ESD)的存储器件。 具有预栅极重掺杂源极和漏极区的MOSFET器件可以如下形成。 具有第二导电类型的间隔的预栅极源极和漏极区域形成在具有第一导电类型的背景掺杂的衬底中。 在栅极源极和漏极区域之间的区域中形成栅极氧化物和栅极。 栅极至少部分地悬垂在栅极之前的源极和漏极区域。 随后,在栅极的垂直侧壁上形成间隔物。 衬底中的源区和漏区形成在间隔物的两侧。 接下来,使用常规方法,添加绝缘和金属层以连接电路元件并形成存储器件。 该器件被连接以形成输入和输入/输出ESD电路。 本发明的器件与ESD保护电路的组合使用最少数量的制造步骤形成耐ESD电路。

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