公开(公告)号：US20070108502A1

公开(公告)日：2007-05-17

申请号：US11281955

申请日：2005-11-17

申请人： Tingkai Li ,  Sheng Hsu ,  Lisa Stecker

发明人： Tingkai Li ,  Sheng Hsu ,  Lisa Stecker

IPC分类号： H01L29/788 ,  H01L21/336 ,  G11C16/04

CPC分类号： H01L29/7881 ,  B82Y10/00 ,  G11C16/349 ,  G11C16/3495 ,  G11C2216/08 ,  H01L29/15 ,  H01L29/40114 ,  H01L29/42324 ,  H01L29/4925 ,  H01L29/66825

摘要： A nanocrystal silicon (Si) quantum dot memory device and associated fabrication method have been provided. The method comprises: forming a gate (tunnel) oxide layer overlying a Si substrate active layer; forming a nanocrystal Si memory film overlying the gate oxide layer, including a polycrystalline Si (poly-Si)/Si dioxide stack; forming a control Si oxide layer overlying the nanocrystal Si memory film; forming a gate electrode overlying the control oxide layer; and, forming source/drain regions in the Si active layer. In one aspect, the nanocrystal Si memory film is formed by depositing a layer of amorphous Si (a-Si) using a chemical vapor deposition (CVD) process, and thermally oxidizing a portion of the a-Si layer. Typically, the a-Si deposition and oxidation processes are repeated, forming a plurality of poly-Si/Si dioxide stacks (i.e., 2 to 5 poly-Si/Si dioxide stacks).

摘要翻译： 已经提供了纳米晶体硅（Si）量子点存储器件和相关的制造方法。 该方法包括：形成覆盖Si衬底有源层的栅极（隧道）氧化层; 形成覆盖栅极氧化物层的纳米晶Si记忆膜，包括多晶Si（多晶硅）/二氧化硅叠层; 形成覆盖在纳米晶Si记忆膜上的对照Si氧化物层; 形成覆盖所述控制氧化物层的栅电极; 并且在Si有源层中形成源/漏区。 在一个方面，通过使用化学气相沉积（CVD）工艺沉积非晶硅层（a-Si）并热氧化a-Si层的一部分来形成纳米晶体Si记忆膜。 通常，重复a-Si沉积和氧化过程，形成多个多Si /二氧化硅叠层（即2至5个多硅/二氧化硅叠层）。

公开(公告)号：US20070015330A1

公开(公告)日：2007-01-18

申请号：US11435669

申请日：2006-05-17

申请人： Tingkai Li ,  Sheng Hsu ,  David Evans

发明人： Tingkai Li ,  Sheng Hsu ,  David Evans

IPC分类号： H01L21/8242

CPC分类号： H01L27/101 ,  G11C13/0007 ,  G11C2213/31 ,  H01L27/2409 ,  H01L29/66143 ,  H01L29/872 ,  H01L45/04 ,  H01L45/1233 ,  H01L45/147

摘要： A method is provided for forming a metal/semiconductor/metal (MSM) back-to-back Schottky diode from a silicon (Si) semiconductor. The method deposits a Si semiconductor layer between a bottom electrode and a top electrode, and forms a MSM diode having a threshold voltage, breakdown voltage, and on/off current ratio. The method is able to modify the threshold voltage, breakdown voltage, and on/off current ratio of the MSM diode in response to controlling the Si semiconductor layer thickness. Generally, both the threshold and breakdown voltage are increased in response to increasing the Si thickness. With respect to the on/off current ratio, there is an optimal thickness. The method is able to form an amorphous Si (a-Si) and polycrystalline Si (polySi) semiconductor layer using either chemical vapor deposition (CVD) or DC sputtering. The Si semiconductor can be doped with a Group V donor material, which decreases the threshold voltage and increases the breakdown voltage.

摘要翻译： 提供了用于从硅（Si）半导体形成金属/半导体/金属（MSM）背对背肖特基二极管的方法。 该方法在底电极和顶电极之间沉积Si半导体层，并形成具有阈值电压，击穿电压和开/关电流比的MSM二极管。 响应于控制Si半导体层厚度，该方法能够修改MSM二极管的阈值电压，击穿电压和导通/截止电流比。 通常，响应于Si厚度的增加，阈值和击穿电压都增加。 关于开/关电流比，存在最佳厚度。 该方法能够使用化学气相沉积（CVD）或DC溅射形成非晶Si（a-Si）和多晶硅（polySi）半导体层。 Si半导体可以掺杂有V族施主材料，其降低阈值电压并增加击穿电压。

公开(公告)号：US20070015328A1

公开(公告)日：2007-01-18

申请号：US11184660

申请日：2005-07-18

申请人： Sheng Hsu ,  Tingkai Li

发明人： Sheng Hsu ,  Tingkai Li

IPC分类号： H01L21/8242

CPC分类号： H01L27/101 ,  G11C13/0007 ,  G11C2213/31 ,  H01L27/2409 ,  H01L27/2463 ,  H01L29/66143 ,  H01L29/872 ,  H01L45/04 ,  H01L45/1233 ,  H01L45/147

摘要： A metal/semiconductor/metal (MSM) binary switch memory device and fabrication process are provided. The device includes a memory resistor bottom electrode, a memory resistor material over the memory resistor bottom electrode, and a memory resistor top electrode over the memory resistor material. An MSM bottom electrode overlies the memory resistor top electrode, a semiconductor layer overlies the MSM bottom electrode, and an MSM top electrode overlies the semiconductor layer. The MSM bottom electrode can be a material such as Pt, Ir, Au, Ag, TiN, or Ti. The MSM top electrode can be a material such as Pt, Ir, Au, TiN, Ti, or Al. The semiconductor layer can be amorphous Si, ZnO2, or InO2.

公开(公告)号：US20060194403A1

公开(公告)日：2006-08-31

申请号：US11378719

申请日：2006-03-17

申请人： Tingkai Li ,  Wei-Wei Zhuang ,  David Evans ,  Sheng Hsu

发明人： Tingkai Li ,  Wei-Wei Zhuang ,  David Evans ,  Sheng Hsu

IPC分类号： H01L21/20

CPC分类号： G11C13/0007 ,  G11C2213/31 ,  H01L45/04 ,  H01L45/1233 ,  H01L45/147

摘要： PrCaMnO (PCMO) thin films with predetermined memory-resistance characteristics and associated formation processes have been provided. In one aspect the method comprises: forming a Pr3+1−xCa2+xMnO thin film composition, where 0.1

摘要翻译： 已经提供了具有预定的记忆电阻特性和相关的形成过程的PrCaMnO（PCMO）薄膜。 在一个方面，所述方法包括：形成Pr 3+ 1-x 2 Ca 2 O 3 x MnO薄膜 组成，其中0.1 _0.78Mn^{4+<​​/SUP>_0.22O2-_{2.96 组合， Mn和O离子的比例变化如下：O 2 - （2.96）; Mn（3+）+（（1-x）+ 8％）; 和Mn 4+（x-8％）。 在另一方面，该方法响应于晶体取向在PCMO膜中产生密度。 例如，如果PCMO膜具有（110）取向，则在垂直于（110）取向的平面中产生在每平方英尺5至6.76个Mn原子的范围内的密度。}}

公开(公告)号：US20060068099A1

公开(公告)日：2006-03-30

申请号：US10957304

申请日：2004-09-30

申请人： Tingkai Li ,  Lawrence Charneski ,  Wei-Wei Zhuang ,  David Evans ,  Sheng Hsu

发明人： Tingkai Li ,  Lawrence Charneski ,  Wei-Wei Zhuang ,  David Evans ,  Sheng Hsu

IPC分类号： C23C16/00

CPC分类号： C23C16/40 ,  H01L45/04 ,  H01L45/1233 ,  H01L45/147 ,  H01L45/1616

摘要： The present invention discloses a method to achieve grading PCMO thin film for use in RRAM memory devices since the contents of Ca, Mn and Pr in a PCMO film can have great influence on its switching property. By choosing precursors for Pr, Ca and Mn having different deposition rate behaviors with respect to deposition temperature or vaporizer temperature, PCMO thin film of grading Pr, Ca or Mn distribution can be achieved by varying that process condition during deposition. The present invention can also be broadly applied to the fabrication of any multicomponent grading thin film process by varying any of the deposition parameters after preparing multiple precursors to have different deposition rate behaviors with respect to that particular process parameter. The present invention starts with a proper selection of precursors in which the selected precursors have different deposition rates with respect to at least one deposition condition such as deposition temperature or vaporizer temperature. The precursors can then be arranged in different delivery systems, or can be pre-mixed in a proper ratio for use in a delivery system, or in any other combinations such as a mixture of two or three liquid precursors using a direct liquid injection and a separate gaseous precursor delivery system for gaseous process gas. Then by varying the appropriate deposition condition, a grading thin film can be achieved.

摘要翻译： 本发明公开了一种用于RRAM存储器件中的PCMO薄膜分级的方法，因为PCMO薄膜中Ca，Mn和Pr的含量对其开关性能有很大的影响。 通过选择相对于沉积温度或蒸发器温度具有不同沉积速率行为的Pr，Ca和Mn的前体，可以通过在沉积期间改变该工艺条件来实现分级Pr，Ca或Mn分布的PCMO薄膜。 本发明还可以广泛地应用于任何多组分分级薄膜工艺的制造，其通过在制备多种前体之后改变任何沉积参数以相对于该特定工艺参数具有不同的沉积速率行为。 本发明开始于适当选择前体，其中所选择的前体相对于至少一个沉积条件例如沉积温度或蒸发器温度具有不同的沉积速率。 然后可将前体布置在不同的递送系统中，或者可以以适当的比例预先混合以用于递送系统，或者以任何其它组合例如使用直接液体注射的两种或三种液体前体的混合物 用于气态工艺气体的单独的气态前体输送系统。 然后通过改变适当的沉积条件，可以实现分级薄膜。

公开(公告)号：US20050266686A1

公开(公告)日：2005-12-01

申请号：US10855088

申请日：2004-05-27

申请人： Wei-Wei Zhuang ,  Tingkai Li ,  Wei Pan ,  David Evans ,  Sheng Hsu

发明人： Wei-Wei Zhuang ,  Tingkai Li ,  Wei Pan ,  David Evans ,  Sheng Hsu

IPC分类号： C23C18/12 ,  C30B23/02 ,  C30B29/24 ,  H01L21/44 ,  H01L45/00

CPC分类号： C23C18/1216 ,  C23C18/1225 ,  C23C18/1241 ,  C23C18/1283 ,  C30B23/02 ,  C30B29/24 ,  H01L45/04 ,  H01L45/1233 ,  H01L45/1253 ,  H01L45/147 ,  H01L45/1608

摘要： A method of fabricating a CMR thin film for use in a semiconductor device includes preparing a CMR precursor in the form of a metal acetate based acetic acid solution; preparing a wafer; placing a wafer in a spin-coating chamber; spin-coating and heating the wafer according to the following: injecting the CMR precursor into a spin-coating chamber and onto the surface of the wafer in the spin-coating chamber; accelerating the wafer to a spin speed of between about 1500 RPM to 3000 RPM for about 30 seconds; baking the wafer at a temperature of about 180° C. for about one minute; ramping the temperature to about 230° C.; baking the wafer for about one minute at the ramped temperature; annealing the wafer at about 500° C. for about five minutes; repeating said spin-coating and heating steps at least three times; post-annealing the wafer at between about 500° C. to 600° C. for between about one to six hours in dry, clean air; and completing the semiconductor device.

摘要翻译： 制造用于半导体器件的CMR薄膜的方法包括制备基于金属乙酸酯的乙酸溶液形式的CMR前体; 准备晶圆; 将晶片放置在旋涂室中; 根据以下步骤旋涂和加热晶片：将CMR前体注入旋涂室并在旋涂室中的晶片表面上; 将晶片加速至约1500RPM至3000RPM之间的旋转速度约30秒; 在约180℃的温度下烘烤晶片约1分钟; 将温度升高至约230℃; 在升温下烘烤晶片约1分钟; 在约500℃退火晶片约5分钟; 重复所述旋涂和加热步骤至少三次; 在约500℃至600℃之间将晶片退火约1至6小时，在干燥，干净的空气中进行退火; 并完成半导体器件。

公开(公告)号：US20050151210A1

公开(公告)日：2005-07-14

申请号：US10755419

申请日：2004-01-12

申请人： Tingkai Li ,  Sheng Hsu

发明人： Tingkai Li ,  Sheng Hsu

IPC分类号： H01L21/28 ,  H01L29/76 ,  H01L29/78 ,  H01L29/94 ,  H01L31/062 ,  H01L31/113 ,  H01L31/119

CPC分类号： H01L21/28291 ,  H01L29/78391

摘要： The present invention discloses a novel ferroelectric transistor design using a resistive oxide film in place of the gate dielectric. By replacing the gate dielectric with a resistive oxide film, and by optimizing the value of the film resistance, the bottom gate of the ferroelectric layer is electrically connected to the silicon substrate, eliminating the trapped charge effect and resulting in the improvement of the memory retention characteristics. The resistive oxide film is preferably a doped conductive oxide in which a conductive oxide is doped with an impurity species. The doped conductive oxide is most preferred to be In2O3 with the dopant species being hafnium oxide, zirconium oxide, lanthanum oxide, or aluminum oxide.

摘要翻译： 本发明公开了一种使用电阻氧化膜代替栅极电介质的新型铁电晶体管设计。 通过用电阻氧化膜代替栅极电介质，并且通过优化膜电阻的值，铁电层的底栅电连接到硅衬底，消除了捕获的电荷效应并导致存储保持率的提高 特点 电阻氧化膜优选为其中掺杂有杂质物质的导电氧化物的掺杂导电氧化物。 掺杂的导电氧化物最优选为掺杂物质为氧化铪，氧化锆，氧化镧或氧化铝的In 2 N 3 O 3。

公开(公告)号：US20080006814A1

公开(公告)日：2008-01-10

申请号：US11900999

申请日：2007-09-15

申请人： Sheng Hsu ,  Tingkai Li

发明人： Sheng Hsu ,  Tingkai Li

IPC分类号： H01L47/00

CPC分类号： H01L27/101 ,  G11C13/0007 ,  G11C2213/31 ,  H01L27/2409 ,  H01L27/2463 ,  H01L29/66143 ,  H01L29/872 ,  H01L45/04 ,  H01L45/1233 ,  H01L45/147

摘要： A metal/semiconductor/metal (MSM) binary switch memory device and fabrication process are provided. The device includes a memory resistor bottom electrode, a memory resistor material over the memory resistor bottom electrode, and a memory resistor top electrode over the memory resistor material. An MSM bottom electrode overlies the memory resistor top electrode, a semiconductor layer overlies the MSM bottom electrode, and an MSM top electrode overlies the semiconductor layer. The MSM bottom electrode can be a material such as Pt, Ir, Au, Ag, TiN, or Ti. The MSM top electrode can be a material such as Pt, Ir, Au, TiN, Ti, or Al. The semiconductor layer can be amorphous Si, ZnO2, or InO2.

摘要翻译： 提供金属/半导体/金属（MSM）二进制开关存储器件和制造工艺。 该器件包括存储器电阻器底部电极，存储器电阻器底部电极上方的存储器电阻器材料，以及存储器电阻器材料上的存储器电阻器顶部电极。 MSM底部电极覆盖存储电阻器顶部电极，半导体层覆盖在MSM底部电极上，并且MSM顶部电极覆盖半导体层。 MSM底部电极可以是诸如Pt，Ir，Au，Ag，TiN或Ti的材料。 MSM顶部电极可以是诸如Pt，Ir，Au，TiN，Ti或Al的材料。 半导体层可以是非晶Si，ZnO 2或InO 2。

公开(公告)号：US20080003697A1

公开(公告)日：2008-01-03

申请号：US11215521

申请日：2005-08-30

申请人： Tingkai Li ,  Sheng Hsu ,  Bruce Ulrich

发明人： Tingkai Li ,  Sheng Hsu ,  Bruce Ulrich

IPC分类号： H01L21/00

CPC分类号： H01L21/28291 ,  H01L29/66583 ,  H01L29/78

摘要： A method of fabricating a conductive metal oxide gate ferroelectric memory transistor includes forming an oxide layer a substrate and removing the oxide layer in a gate area; depositing a conductive metal oxide layer on the oxide layer and on the exposed gate area; depositing a titanium layer on the metal oxide layer; patterning and etching the titanium layer and the metal oxide layer to remove the titanium layer and the metal oxide layer from the substrate except in the gate area; depositing, patterning and etching an oxide layer to form a gate trench; depositing and etching a barrier insulator layer to form a sidewall barrier in the gate trench; removing the titanium layer from the gate area; depositing, smoothing and annealing a ferroelectric layer in the gate trench; depositing, patterning and etching a top electrode; and completing the conductive metal oxide gate ferroelectric memory transistor.

摘要翻译： 一种制造导电金属氧化物栅极铁电存储晶体管的方法，包括：在衬底上形成氧化物层并去除栅极区域中的氧化物层; 在氧化物层和暴露的栅极区上沉积导电金属氧化物层; 在所述金属氧化物层上沉积钛层; 图案化和蚀刻钛层和金属氧化物层以除去栅极区域之外的基板以除去钛层和金属氧化物层; 沉积，图案化和蚀刻氧化物层以形成栅极沟槽; 沉积和蚀刻阻挡绝缘体层以在栅极沟槽中形成侧壁势垒; 从栅极区域去除钛层; 沉积，平滑和退火栅极沟槽中的铁电层; 沉积，图案化和蚀刻顶部电极; 并完成导电金属氧化物栅极铁电存储晶体管。

公开(公告)号：US20070221975A1

公开(公告)日：2007-09-27

申请号：US11805177

申请日：2007-05-22

申请人： Tingkai Li ,  Lawrence Charneski ,  Wei-Wei Zhuang ,  David Evans ,  Sheng Hsu

发明人： Tingkai Li ,  Lawrence Charneski ,  Wei-Wei Zhuang ,  David Evans ,  Sheng Hsu

IPC分类号： H01L29/92

CPC分类号： H01L45/04 ,  H01L45/1233 ,  H01L45/147 ,  H01L45/1616

摘要： A multi-layer PrxCa1-xMnO3 (PCMO) thin film capacitor and associated deposition method are provided for forming a bipolar switching thin film. The method comprises: forming a bottom electrode; depositing a nanocrystalline PCMO layer; depositing a polycrystalline PCMO layer; forming a multi-layer PCMO film with bipolar switching properties; and forming top electrode overlying the PCMO film. If the polycrystalline layers are deposited overlying the nanocrystalline layers, a high resistance can be written with narrow pulse width, negative voltage pulses. The PCMO film can be reset to a low resistance using a narrow pulse width, positive amplitude pulse. Likewise, if the nanocrystalline layers are deposited overlying the polycrystalline layers, a high resistance can be written with narrow pulse width, positive voltage pulses, and reset to a low resistance using a narrow pulse width, negative amplitude pulse.

摘要翻译： 提供了多层Pr 1 x 1 x x MnO 3（PCMO）薄膜电容器和相关的沉积方法，用于形成双极开关 薄膜。 该方法包括：形成底部电极; 沉积纳米晶体PCMO层; 沉积多晶的PCMO层; 形成具有双极开关特性的多层PCMO膜; 并形成覆盖PCMO膜的顶部电极。 如果多晶层沉积在纳米晶层之上，则可以用窄脉冲宽度，负电压脉冲写入高电阻。 PCMO膜可以使用窄脉冲宽度，正幅度脉冲复位为低电阻。 同样，如果纳米晶层沉积在多晶层上，则可以用窄脉冲宽度，正电压脉冲写入高电阻，并使用窄脉冲宽度，负幅度脉冲将其复位为低电阻。