公开(公告)号：US20040113235A1

公开(公告)日：2004-06-17

申请号：US10319724

申请日：2002-12-13

Applicant: International Business Machines Corporation

Inventor： Douglas D. Coolbaugh ,  John M. Cotte ,  Ebenezer E. Eshun ,  Kenneth J. Stein ,  Kunal Vaed ,  Richard P. Volant

IPC: H01L029/00 ,  H01L021/20

CPC classification number: H01L28/90 ,  H01L21/02178 ,  H01L21/02183 ,  H01L21/022 ,  H01L21/02258 ,  H01L21/0228 ,  H01L21/31604 ,  H01L21/76807 ,  H01L21/76831 ,  H01L28/40 ,  H01L28/86

Abstract: The invention is directed to unique high-surface area BEOL capacitor structures with high-k dielectric layers and methods for fabricating the same. These high-surface area BEOL capacitor structures may be used in analog and mixed signal applications. The capacitor is formed within a trench with pedestals within the trench to provide additional surface area. The top and bottom electrodes are created using damascene integration scheme. The dielectric layer is created as a multilayer dielectric film comprising for instance Al2O3, Al2O3/Ta2O5, Al2O3/Ta2O5/Al2O3 and the like. The dielectric layer may be deposited by methods like atomic layer deposition or chemical vapor deposition. The dielectric layer used in the capacitor may also be produced by anodic oxidation of a metallic precursor to yield a high dielectric constant oxide layer.

Abstract translation: 本发明涉及具有高k电介质层的独特的高表面积BEOL电容器结构及其制造方法。 这些高表面积BEOL电容器结构可用于模拟和混合信号应用。 电容器形成在具有沟槽内的基座的沟槽内，以提供额外的表面积。 顶部和底部电极使用大马士革集成方案创建。 电介质层被形成为包括例如Al 2 O 3，Al 2 O 3 / Ta 2 O 5，Al 2 O 3 / Ta 2 O 5 / Al 2 O 3等的多层电介质膜。 电介质层可以通过诸如原子层沉积或化学气相沉积的方法沉积。 电容器中使用的电介质层也可以通过金属前体的阳极氧化产生高介电常数氧化物层。

公开(公告)号：US20030059992A1

公开(公告)日：2003-03-27

申请号：US09961009

申请日：2001-09-21

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

Inventor： John M. Cotte ,  Kenneth J. Stein ,  Seshadri Subbanna ,  Richard P. Volant

IPC: H01L021/337

CPC classification number: H01L28/24 ,  H01C17/262

Abstract: A method of improving the tolerance of a back-end-of-the-line (BEOL) thin film resistor is provided. Specifically, the method of the present invention includes an anodization step which is capable of converting a portion of base resistor film into an anodized region. The anodized resistor thus formed has a sheet resistivity that is higher than that of the base resistor film.

Abstract translation: 提供了一种改进后端（BEOL）薄膜电阻的公差的方法。 具体地，本发明的方法包括能够将基极电阻膜的一部分转变为阳极氧化区域的阳极氧化步骤。 如此形成的阳极氧化电阻的电阻率比基极电阻膜高。