公开(公告)号：US10304747B2

公开(公告)日：2019-05-28

申请号：US15847028

申请日：2017-12-19

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  GLOBALFOUNDRIES Inc

Inventor： Balasubramanian Pranatharthiharan ,  Ruilong Xie ,  Chun-Chen Yeh

IPC: H01L29/08 ,  H01L21/8238 ,  H01L29/66 ,  H01L27/092 ,  H01L29/417 ,  H01L29/45 ,  H01L23/522 ,  H01L21/768 ,  H01L21/285

Abstract: A method for fabricating a dual silicide device includes growing source and drain (S/D) regions for an N-type device, forming a protection layer over a gate structure and the S/D regions of the N-type device and growing S/D regions for a P-type device. A first dielectric layer is conformally deposited and portions removed to expose the S/D regions. Exposed S/D regions for the P-type device are silicided to form a liner. A second dielectric layer is conformally deposited. A dielectric fill is formed over the second dielectric layer. Contact holes are opened through the second dielectric layer to expose the liner for the P-type device and expose the protection layer for the N-type device. The S/D regions for the N-type device are exposed by opening the protection layer. Exposed S/D regions adjacent to the gate structure are silicided to form a liner for the N-type device. Contacts are formed.

公开(公告)号：US10297506B2

公开(公告)日：2019-05-21

申请号：US16038426

申请日：2018-07-18

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  GLOBALFOUNDRIES Inc.

Inventor： Huiming Bu ,  Andrew M. Greene ,  Balasubramanian Pranatharthiharan ,  Ruilong Xie

IPC: H01L21/8234 ,  H01L21/768 ,  H01L27/088 ,  H01L29/66 ,  H01L21/02 ,  H01L21/311 ,  H01L21/3213 ,  H01L29/417

Abstract: A method for filling gaps between structures includes forming a plurality of high aspect ratio structures adjacent to one another with gaps, forming a first dielectric layer on tops of the structures and conformally depositing a spacer dielectric layer over the structures. The spacer dielectric layer is removed from horizontal surfaces and a protection layer is conformally deposited over the structures. The gaps are filled with a flowable dielectric, which is recessed to a height along sidewalls of the structures by a selective etch process such that the protection layer protects the spacer dielectric layer on sidewalls of the structures. The first dielectric layer and the spacer dielectric layer are exposed above the height using a higher etch resistance than the protection layer to maintain dimensions of the spacer layer dielectric through the etching processes. The gaps are filled by a high density plasma fill.

公开(公告)号：US10236212B2

公开(公告)日：2019-03-19

申请号：US15200716

申请日：2016-07-01

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  GLOBALFOUNDRIES INC.

Inventor： Balasubramanian Pranatharthiharan ,  Junli Wang ,  Ruilong Xie

IPC: H01L21/8234 ,  H01L29/08 ,  H01L27/088 ,  H01L29/06 ,  H01L29/51 ,  H01L29/66 ,  H01L29/417 ,  H01L29/78 ,  H01L29/10 ,  H01L21/84 ,  H01L27/12

Abstract: A method of forming a semiconductor device that includes providing a first set of fin structures having a first pitch, and a second set of fin structure having a second pitch, wherein the second pitch is greater than the first pitch. An epitaxial semiconductor material on the first and second set of fin structures. The epitaxial semiconductor material on the first fin structures is merging epitaxial material and the epitaxial material on the second fin structures is non-merging epitaxial material. A dielectric liner is formed atop the epitaxial semiconductor material that is present on the first and second sets of fin structures. The dielectric liner is removed from a portion of the non-merging epitaxial material that is present on the second set of fin structures. A bridging epitaxial semiconductor material is formed on exposed surfaces of the non-merging epitaxial material.

公开(公告)号：US20180254331A1

公开(公告)日：2018-09-06

申请号：US15447210

申请日：2017-03-02

Applicant: GLOBALFOUNDRIES Inc.

Inventor： Ruilong Xie ,  Zhenxing Bi ,  Pietro Montanini ,  Eric R. Miller ,  Balasubramanian Pranatharthiharan ,  Oleg Gluschenkov ,  Ruqiang Bao ,  Kangguo Cheng

IPC: H01L29/66 ,  H01L21/3105

CPC classification number: H01L29/66795 ,  H01L21/3105 ,  H01L21/31053 ,  H01L29/6656

Abstract: The disclosure relates to methods of forming etch-resistant spacers in an integrated circuit (IC) structure. Methods according to the disclosure can include: forming a mask on an upper surface of a gate structure positioned over a substrate; forming a spacer material on the substrate, the mask, and exposed sidewalls of the gate structure; forming a separation layer over the substrate and laterally abutting the spacer material to a predetermined height, such that an exposed portion of the spacer material is positioned above an upper surface of the separation layer and at least partially in contact with the mask; and implanting a dopant into the exposed portion of the spacer material to yield a dopant-implanted region within the spacer material, wherein the dopant-implanted region of the spacer material has a greater etch resistivity than a remainder of the spacer material.

公开(公告)号：US09997418B2

公开(公告)日：2018-06-12

申请号：US15240554

申请日：2016-08-18

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  GLOBALFOUNDRIES Inc

Inventor： Balasubramanian Pranatharthiharan ,  Ruilong Xie ,  Chun-Chen Yeh

IPC: H01L21/8238 ,  H01L29/66 ,  H01L27/092 ,  H01L29/417 ,  H01L29/08 ,  H01L29/45 ,  H01L23/522 ,  H01L21/768 ,  H01L21/285

CPC classification number: H01L21/823871 ,  H01L21/28518 ,  H01L21/76897 ,  H01L21/823814 ,  H01L21/823864 ,  H01L23/5226 ,  H01L27/092 ,  H01L29/0847 ,  H01L29/41725 ,  H01L29/456 ,  H01L29/665 ,  H01L29/6653 ,  H01L29/66545 ,  H01L29/66628

Abstract: A method for fabricating a dual silicide device includes growing source and drain (S/D) regions for an N-type device, forming a protection layer over a gate structure and the S/D regions of the N-type device and growing S/D regions for a P-type device. A first dielectric layer is conformally deposited and portions removed to expose the S/D regions. Exposed S/D regions for the P-type device are silicided to form a liner. A second dielectric layer is conformally deposited. A dielectric fill is formed over the second dielectric layer. Contact holes are opened through the second dielectric layer to expose the liner for the P-type device and expose the protection layer for the N-type device. The S/D regions for the N-type device are exposed by opening the protection layer. Exposed S/D regions adjacent to the gate structure are silicided to form a liner for the N-type device. Contacts are formed.

公开(公告)号：US20180108749A1

公开(公告)日：2018-04-19

申请号：US15847186

申请日：2017-12-19

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  GLOBALFOUNDRIES Inc.

Inventor： Andrew M. Greene ,  Balasubramanian Pranatharthiharan ,  Ruilong Xie

IPC: H01L29/66 ,  H01L21/768 ,  H01L29/417 ,  H01L21/283 ,  H01L27/088

CPC classification number: H01L29/665 ,  H01L21/283 ,  H01L21/30604 ,  H01L21/76805 ,  H01L21/76843 ,  H01L21/76885 ,  H01L21/76889 ,  H01L21/76895 ,  H01L21/76897 ,  H01L21/823418 ,  H01L21/823431 ,  H01L21/823475 ,  H01L23/485 ,  H01L23/53223 ,  H01L23/53266 ,  H01L23/535 ,  H01L27/0886 ,  H01L29/0847 ,  H01L29/41791 ,  H01L29/66795 ,  H01L29/785 ,  H01L29/7851

Abstract: A method for forming self-aligned contacts includes patterning a mask between fin regions of a semiconductor device, etching a cut region through a first dielectric layer between the fin regions down to a substrate and filling the cut region with a first material, which is selectively etchable relative to the first dielectric layer. The first dielectric layer is isotropically etched to reveal source and drain regions in the fin regions to form trenches in the first material where the source and drain regions are accessible. The isotropic etching is super selective to remove the first dielectric layer relative to the first material and relative to gate structures disposed between the source and drain regions. Metal is deposited in the trenches to form silicide contacts to the source and drain regions.

公开(公告)号：US09929059B2

公开(公告)日：2018-03-27

申请号：US15366223

申请日：2016-12-01

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  GLOBALFOUNDRIES Inc

Inventor： Balasubramanian Pranatharthiharan ,  Ruilong Xie ,  Chun-Chen Yeh

IPC: H01L21/8238 ,  H01L29/66 ,  H01L27/092 ,  H01L29/417 ,  H01L29/08 ,  H01L29/45 ,  H01L23/522 ,  H01L21/768 ,  H01L21/285

CPC classification number: H01L21/823871 ,  H01L21/28518 ,  H01L21/76897 ,  H01L21/823814 ,  H01L21/823864 ,  H01L23/5226 ,  H01L27/092 ,  H01L29/0847 ,  H01L29/41725 ,  H01L29/456 ,  H01L29/665 ,  H01L29/6653 ,  H01L29/66545 ,  H01L29/66628

Abstract: A method for fabricating a dual silicide device includes growing source and drain (S/D) regions for an N-type device, forming a protection layer over a gate structure and the S/D regions of the N-type device and growing S/D regions for a P-type device. A first dielectric layer is conformally deposited and portions removed to expose the S/D regions. Exposed S/D regions for the P-type device are silicided to form a liner. A second dielectric layer is conformally deposited. A dielectric fill is formed over the second dielectric layer. Contact holes are opened through the second dielectric layer to expose the liner for the P-type device and expose the protection layer for the N-type device. The S/D regions for the N-type device are exposed by opening the protection layer. Exposed S/D regions adjacent to the gate structure are silicided to form a liner for the N-type device. Contacts are formed.

公开(公告)号：US20180006140A1

公开(公告)日：2018-01-04

申请号：US15196335

申请日：2016-06-29

Applicant: International Business Machines Corporation ,  GlobalFoundries, Inc.

Inventor： Jody Fronheiser ,  Shogo Mochizuki ,  Hiroaki Niimi ,  Balasubramanian Pranatharthiharan ,  Mark Raymond ,  Tenko Yamashita

IPC: H01L29/66 ,  H01L21/768 ,  H01L21/285 ,  H01L23/535 ,  H01L21/02

CPC classification number: H01L21/76895 ,  H01L21/02068 ,  H01L21/285 ,  H01L21/28525 ,  H01L21/76814 ,  H01L21/76831 ,  H01L29/045 ,  H01L29/0847 ,  H01L29/0895 ,  H01L29/41791 ,  H01L29/456 ,  H01L29/66795 ,  H01L29/785

Abstract: Forming a contact is disclosed. A trench through an interlayer dielectric layer is opened down to a substrate. The interlayer dielectric layer is formed on the substrate such that the substrate is the bottom surface of the trench. A cleaning process of the trench is performed. The bottom surface of the trench is recessed. A trench contact epitaxial layer is formed in the trench. An oxide layer is formed on top of the trench contact epitaxial layer in the trench. A metal oxide layer is formed on top of the oxide layer in the trench. A metal contact is formed on top of the metal oxide layer, where the oxide layer and the metal oxide layer together form a dipole layer.

公开(公告)号：US20170365521A1

公开(公告)日：2017-12-21

申请号：US15689645

申请日：2017-08-29

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  GLOBALFOUNDRIES INC.

Inventor： Balasubramanian Pranatharthiharan ,  Junli Wang ,  Ruilong Xie

IPC: H01L21/8234 ,  H01L29/06 ,  H01L29/08 ,  H01L27/088 ,  H01L29/66 ,  H01L29/10

CPC classification number: H01L21/823418 ,  H01L21/823412 ,  H01L21/823425 ,  H01L21/823431 ,  H01L21/823481 ,  H01L21/845 ,  H01L27/0886 ,  H01L27/1211 ,  H01L29/0653 ,  H01L29/0847 ,  H01L29/1037 ,  H01L29/41791 ,  H01L29/511 ,  H01L29/513 ,  H01L29/517 ,  H01L29/66545 ,  H01L29/785

Abstract: A method of forming a semiconductor device that includes providing a first set of fin structures having a first pitch, and a second set of fin structure having a second pitch, wherein the second pitch is greater than the first pitch. An epitaxial semiconductor material on the first and second set of fin structures. The epitaxial semiconductor material on the first fin structures is merging epitaxial material and the epitaxial material on the second fin structures is non-merging epitaxial material. A dielectric liner is formed atop the epitaxial semiconductor material that is present on the first and second sets of fin structures. The dielectric liner is removed from a portion of the non-merging epitaxial material that is present on the second set of fin structures. A bridging epitaxial semiconductor material is formed on exposed surfaces of the non-merging epitaxial material.

公开(公告)号：US09741715B2

公开(公告)日：2017-08-22

申请号：US15179992

申请日：2016-06-11

Applicant: International Business Machines Corporation ,  GlobalFoundries, Inc.

Inventor： Balasubramanian Pranatharthiharan ,  Hui Zang

IPC: H01L21/70 ,  H01L27/088 ,  H01L27/11 ,  H01L29/16 ,  H01L29/06 ,  H01L21/304 ,  H01L21/02 ,  H01L29/78

CPC classification number: H01L27/1104 ,  H01L21/0217 ,  H01L21/02532 ,  H01L21/02639 ,  H01L21/02642 ,  H01L21/3043 ,  H01L21/324 ,  H01L21/76 ,  H01L21/76224 ,  H01L21/8221 ,  H01L21/823814 ,  H01L21/823821 ,  H01L21/823878 ,  H01L27/0886 ,  H01L27/1116 ,  H01L28/00 ,  H01L29/0649 ,  H01L29/0847 ,  H01L29/16 ,  H01L29/1608 ,  H01L29/6656 ,  H01L29/66795 ,  H01L29/785

Abstract: A semiconductor device includes a set of fin structures having a set of fin ends at a respective vertical surface of a fin structure and is separated by a set of trenches from other fin structures. Each of the fin structures has a top surface which is higher than a top surface of a dielectric material in the set of trenches. A set of dielectric blocks is disposed at the set of fin ends, the dielectric blocks having a top surface level with or above the top surfaces of the fin structures which inhibit excessive epitaxial growth at the fin ends.