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; 并且形成覆盖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。
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:
A method of fabricating a PCMO thin film at low temperature for use in a RRAM device includes preparing a PCMO precursor; preparing a substrate; placing the substrate into a MOCVD chamber; introducing the PCMO precursor into the MOCVD chamber to deposit a PCMO thin film on the substrate; maintaining a MOCVD vaporizer at between about 240° C. to 280° C. and maintaining the MOCVD chamber at a temperature of between about 300° C. to 400° C.; removing the PCMO thin-film bearing substrate from the MOCVD chamber; and completing the RRAM device.
摘要:
A method is provided for forming a metal/semiconductor/metal (MSM) current limiter and resistance memory cell with an MSM current limiter. The method provides a substrate; forms an MSM bottom electrode overlying the substrate; forms a ZnOx semiconductor layer overlying the MSM bottom electrode, where x is in the range between about 1 and about 2, inclusive; and, forms an MSM top electrode overlying the semiconductor layer. The ZnOx semiconductor can be formed through a number of different processes such as spin-coating, direct current (DC) sputtering, radio frequency (RF) sputtering, metalorganic chemical vapor deposition (MOCVD), or atomic layer deposition (ALD).
摘要:
A method of monitoring synthesis of PCMO precursor solutions includes preparing a PCMO precursor solution and withdrawing samples of the precursor solution at intervals during a reaction phase of the PCMO precursor solution synthesis. The samples of the PCMO precursor solution are analyzed by UV spectroscopy to determine UV transmissivity of the samples of the PCMO precursor solution and the samples used to form PCMO thin films. Electrical characteristics of the PCMO thin films formed from the samples are determined to identify PCMO thin films having optimal electrical characteristics. The UV spectral characteristics of the PCMO precursor solutions are correlated with the PCMO thin films having optimal electrical characteristics. The UV spectral characteristics are used to monitor synthesis of future batches of the PCMO precursor solutions, which will result in PCMO thin films having optimal electrical characteristics.
摘要:
A method is provided for forming a metal/semiconductor/metal (MSM) current limiter and resistance memory cell with an MSM current limiter. The method includes the steps of: providing a substrate; forming an MSM bottom electrode overlying the substrate; forming a ZnOx semiconductor layer overlying the MSM bottom electrode, where x is in the range between about 1 and about 2, inclusive; and, forming an MSM top electrode overlying the semiconductor layer, The ZnOx semiconductor can be formed through a number of different processes such as spin-coating, direct current (DC) sputtering, radio frequency (RF) sputtering, metalorganic chemical vapor deposition (MOCVD), or atomic layer deposition (ALD).
摘要:
A method is provided for forming a buffered-layer memory cell. The method comprises: forming a bottom electrode; forming a colossal magnetoresistance (CMR) memory film overlying the bottom electrode; forming a memory-stable semiconductor buffer layer, typically a metal oxide, overlying the memory film; and, forming a top electrode overlying the semiconductor buffer layer. In some aspects of the method the semiconductor buffer layer is formed from YBa2Cu3O7−X (YBCO), indium oxide (In2O3), or ruthenium oxide (RuO2), having a thickness in the range of 10 to 200 nanometers (nm). The top and bottom electrodes may be TiN/Ti, Pt/TiN/Ti, In/TiN/Ti, PtRhOx compounds, or PtIrOx compounds. The CMR memory film may be a Pr1−XCaXMnO3 (PCMO) memory film, where x is in the region between 0.1 and 0.6, with a thickness in the range of 10 to 200 nm.
摘要翻译:提供了一种用于形成缓冲层存储单元的方法。 该方法包括:形成底部电极; 形成覆盖底部电极的巨大磁阻(CMR)记忆膜; 形成存储器稳定的半导体缓冲层,通常为覆盖存储膜的金属氧化物; 并且形成覆盖半导体缓冲层的顶部电极。 在该方法的一些方面,半导体缓冲层由YBa 2 N 3 O 7-X(YBCO),氧化铟(In 2或2 O 3)或氧化钌(RuO 2 N 2),其厚度在10-200纳米(nm)的范围内。 顶部和底部电极可以是TiN / Ti,Pt / TiN / Ti,In / TiN / Ti,PtRhOx化合物或PtIrOx化合物。 CMR存储器膜可以是Pr 1-X C x MnO 3(PCMO)存储膜,其中x在0.1之间的区域 和0.6,厚度在10至200nm的范围内。
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 0.78Mn4+</SUP>0.22O2-2.96 SUB>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。
摘要:
A method for obtaining reversible resistance switches on a PCMO thin film when integrated with a highly crystallized seed layer includes depositing, by MOCVD, a seed layer of PCMO, in highly crystalline form, thin film, having a thickness of between about 50 Å to 300 Å, depositing a second PCMO thin film layer on the seed layer, by spin coating, having a thickness of between about 500 Å to 3000 Å, to form a combined PCMO layer; increasing the resistance of the combined PCMO film in a semiconductor device by applying a negative electric pulse of between about −4V to −5V, having a pulse width of between about 75 nsec to 1 μsec; and decreasing the resistance of the combined PCMO layer in a semiconductor device by applying a positive electric pulse of between about +2.5V to +4V, having a pulse width greater than 2.0 μsec.
摘要:
Asymmetrically structured memory cells and a fabrication method are provided. The method comprises: forming a bottom electrode; forming an electrical pulse various resistance (EPVR) first layer having a polycrystalline structure over the bottom electrode; forming an EPVR second layer adjacent the first layer, with a nano-crystalline or amorphous structure; and, forming a top electrode overlying the first and second EPVR layers. EPVR materials include CMR, high temperature super conductor (HTSC), or perovskite metal oxide materials. In one aspect, the EPVR first layer is deposited with a metalorganic spin coat (MOD) process at a temperature in the range between 550 and 700 degrees C. The EPVR second layer is formed at a temperature less than, or equal to the deposition temperature of the first layer. After a step of removing solvents, the MOD deposited EPVR second layer is formed at a temperature less than, or equal to the 550 degrees C.