公开(公告)号：JPH11162987A

公开(公告)日：1999-06-18

申请号：JP27846198

申请日：1998-09-30

Applicant: SIEMENS AG ,  IBM

Inventor： VARIAN KATHRYN H ,  TOBBEN DIRK ,  SENDELBACH MATTHEW

IPC: H01L21/302 ,  H01L21/3065 ,  H01L21/3105 ,  H01L21/3205 ,  H01L21/762 ,  H01L21/768 ,  H01L23/522

Abstract: PROBLEM TO BE SOLVED: To produce a substantial plane where recessed transformation of wide space is reduced, by performing CMP polishing on a nonconformal layer accumulated on complicated landform comprising narrow parts accompanied with narrow gaps, wide parts, and wide gaps. SOLUTION: A nonconformal layer 160 is made on the surface of a substrate 101. Because of the nonconformality of this layer 160, thickness on the surface of a wide active region 112 is thicker than the thickness of a narrow active region 110. Polysilicon (poly) is accumulated on the surface by CVD. A conformal poly layer arises on the nonconformal layer 160 by CVD. The poly layer is flattened selectively by CMP to an oxide. For the CMP polishing, the protuberance of polysilicon is polished first, and the surface of polysilicon is flattened gradually as the material is removed from there. CMP is continued until the surface of the oxide layer 160 in the protuberance region is exposed and a flat top 179 arises.

公开(公告)号：JP2002026146A

公开(公告)日：2002-01-25

申请号：JP2001180648

申请日：2001-06-14

Applicant: IBM

Inventor： DIVAKARUNI RAMA ,  JAMMY RAJARAO ,  BYOON WAI KIMU ,  MANDELMAN JACK A ,  SUDO AKIRA ,  TOBBEN DIRK

IPC: H01L21/8242 ,  H01L27/108 ,  H01L29/94

Abstract: PROBLEM TO BE SOLVED: To provide a structure and a method for a trench-type capacitor improved in its charge holding capability. SOLUTION: The memory device includes a trench 23 which is formed on a substrate and has an upper part. A collar oxide film 21 is arranged at the upper part of the trench. A collar oxide film includes a pedestal 25. A conductor is charged in the trench. The pedestal reduces a leak of charges in the conductor. The method for forming the memory device, having the collar oxide film having the pedestal collar, is also disclosed.

公开(公告)号：JP2001044384A

公开(公告)日：2001-02-16

申请号：JP2000220682

申请日：2000-07-21

Applicant: IBM ,  INFINEON TECHNOLOGIES CORP

Inventor： GRUENING ULRIKE ,  RADENS CARL J ,  TOBBEN DIRK

IPC: H01L27/108 ,  H01L21/76 ,  H01L21/8242

Abstract: PROBLEM TO BE SOLVED: To reduce a method for forming an embedded plate diffusion region in a deep trench storage capacitor by filling a non-photosensitive underfill material into the lower region of a trench before forming a collar at the upper region of the trench. SOLUTION: A trench 10 is covered with a thin barrier film 30, and a non- photosensitive underfill 16 is filled into the lower region of the trench 10. Then, the barrier film 30 is eliminated by an upper region 223 of the trench 10 by chemical etching using wet solution or the like. Also, the underfill 16 masks a lower region, 24 while the barrier film 30 at the upper region 22 is being removed. Then, the underfill 16 is removed from a lower region by stripping or the like by a chemical containing HF, and a collar 32 is formed at the upper region 22 by thermal oxidation growth or the like by the local oxidation process.

公开(公告)号：DE60036305T2

公开(公告)日：2008-05-15

申请号：DE60036305

申请日：2000-10-04

Applicant: IBM ,  QIMONDA NORTH AMERICA CORP

Inventor： TOBBEN DIRK ,  GAMBINO JEFFREY

IPC: H01L21/768 ,  H01L23/522

Abstract: A method for connecting metal structures with self-aligned metal caps, in accordance with the invention, includes providing a metal structure in a first dielectric layer. The metal structure and the first dielectric layer share a substantially planar surface. A cap metal is selectively depositing on the metal structure such that the cap metal is deposited only on the metal structure. A second dielectric layer is formed over the cap metal. The second dielectric layer is opened to form a via terminating in the cap metal. A conductive material is deposited in the via to provide a contact to the metal structure through the cap metal.

公开(公告)号：DE60036305D1

公开(公告)日：2007-10-18

申请号：DE60036305

申请日：2000-10-04

Applicant: INFINEON TECHNOLOGIES CORP ,  IBM

Inventor： TOBBEN DIRK ,  GAMBINO JEFFREY

IPC: H01L21/768 ,  H01L23/522

Abstract: A method for connecting metal structures with self-aligned metal caps, in accordance with the invention, includes providing a metal structure in a first dielectric layer. The metal structure and the first dielectric layer share a substantially planar surface. A cap metal is selectively depositing on the metal structure such that the cap metal is deposited only on the metal structure. A second dielectric layer is formed over the cap metal. The second dielectric layer is opened to form a via terminating in the cap metal. A conductive material is deposited in the via to provide a contact to the metal structure through the cap metal.

公开(公告)号：DE69939300D1

公开(公告)日：2008-09-25

申请号：DE69939300

申请日：1999-06-17

Applicant: SIEMENS AG ,  IBM

Inventor： ARNDT KENNETH C ,  GAMBINO JEFFREY P ,  MANDELMA JACK A ,  NARAYAN CHANDRASEKHAR ,  SCHNABEL RAINES F ,  SCHUTZ RONALD J ,  TOBBEN DIRK

IPC: H01L21/82 ,  H01L23/525 ,  H01L21/768

Abstract: A semiconductor structure comprising a semiconductor substrate, an electrically conductive level on the substrate and a metal fuse located at the conductive level wherein the fuse comprises a self-aligned dielectric etch stop layer thereon is provided along with processes for its fabrication.

公开(公告)号：DE69836943T2

公开(公告)日：2008-02-14

申请号：DE69836943

申请日：1998-09-29

Applicant: IBM ,  INFINEON TECHNOLOGIES AG

Inventor： VARIAN KATHRYN H ,  TOBBEN DIRK ,  SENDELBACH MATTHEW

IPC: H01L21/302 ,  H01L21/3105 ,  H01L21/3065 ,  H01L21/3205 ,  H01L21/762 ,  H01L21/768 ,  H01L23/522

Abstract: A substantially planar surface is produced from a non-conformal device layer formed over a complex topography, which includes narrow features with narrow gaps and wide features and wide gaps. A conformal layer is deposited over the non-conformal layer. The surface is then polished to expose the non-conformal layer over the wide features. An etch selective to the non-conformal layer is then used to substantially remove the non-conformal layer over the wide features. The conformal layer is then removed, exposing the non-conformal layer. The thickness of the non-conformal layer is now more uniform as compared to before. This enables the polish to produce a planar surface with reduced dishing in the wide spaces.

公开(公告)号：HK1032292A1

公开(公告)日：2001-07-13

申请号：HK01102673

申请日：2001-04-17

Applicant: IBM ,  INFINEON TECHNOLOGIES CORP

Inventor： GRUENING ULRIKE ,  RADENS CARL J ,  TOBBEN DIRK

IPC: H01L21/76 ,  H01L27/108 ,  H01L21/8242 ,  H01L

Abstract: A process for manufacturing a deep trench capacitor in a trench (10). The capacitor comprises a collar (18) in an upper region of the trench and a buried plate (26) in a lower region of the trench. The improvement comprises, before forming the collar in the trench upper region, filling the trench lower region with a non-photosensitive underfill material (16) such as spin-on-glass. The process may comprise the steps of (a) forming a deep trench in a substrate; (b) filling the trench lower region with an underfill material; (c) forming a collar in the trench upper region; (d) removing the underfill; and (e) forming a buried plate in the trench lower region.

公开(公告)号：DE69836943D1

公开(公告)日：2007-03-15

申请号：DE69836943

申请日：1998-09-29

Applicant: IBM ,  INFINEON TECHNOLOGIES AG

Inventor： VARIAN KATHRYN H ,  TOBBEN DIRK ,  SENDELBACH MATTHEW

IPC: H01L21/302 ,  H01L21/3105 ,  H01L21/3065 ,  H01L21/3205 ,  H01L21/762 ,  H01L21/768 ,  H01L23/522

Abstract: A substantially planar surface is produced from a non-conformal device layer formed over a complex topography, which includes narrow features with narrow gaps and wide features and wide gaps. A conformal layer is deposited over the non-conformal layer. The surface is then polished to expose the non-conformal layer over the wide features. An etch selective to the non-conformal layer is then used to substantially remove the non-conformal layer over the wide features. The conformal layer is then removed, exposing the non-conformal layer. The thickness of the non-conformal layer is now more uniform as compared to before. This enables the polish to produce a planar surface with reduced dishing in the wide spaces.