公开(公告)号：GB2495606A

公开(公告)日：2013-04-17

申请号：GB201217771

申请日：2012-10-04

Applicant: IBM

Inventor： YAMASHITA TENKO ,  ANDO TAKASHI ,  STANDAERT THEODORUS EDUARDUS ,  KANAKASABAPATHY SIVANANDA ,  KULKARNI PRANITA ,  CHANG JOSEPHINE

IPC: H01L29/78 ,  H01L29/423

Abstract: A transistor, such as a FinFET, includes a gate structure 6, 102 disposed over a substrate. The gate structure has a width and also a length and a height defining two opposing sidewalls of the gate structure. The transistor further includes at least one electrically conductive channel between a source region and a drain region that passes through the sidewalls of the gate structure; a dielectric layer 310 disposed over the gate structure and portions of the electrically conductive channel that are external to the gate structure; and an air gap 314 underlying the dielectric layer. The air gap is disposed adjacent to the sidewalls of the gate structure and functions to reduce parasitic capacitance of the transistor. At least one method to fabricate the transistor is also disclosed.

公开(公告)号：DE112018003323T5

公开(公告)日：2020-03-12

申请号：DE112018003323

申请日：2018-06-25

Applicant: IBM

Inventor： KARVE GAURI ,  MONTANINI PIETRO ,  MILLER ERIC ,  KANAKASABAPATHY SIVANANDA ,  GREENE ANDREW ,  HE HONG

IPC: H01L21/336 ,  H01L21/8238 ,  H01L29/78

Abstract: Es werden FinFET-Einheiten, die mehrschichtige Gate-Abstandshalter aufweisen, ebenso wie Verfahren zur Herstellung von FinFET-Einheiten bereitgestellt, bei denen mehrschichtige Gate-Abstandshalter verwendet werden, um die Erosion von vertikalen Halbleiter-Fins zu verhindern oder ansonsten zu minimieren, wenn die Gate-Abstandshalter gebildet werden. Ein Verfahren zur Herstellung einer Halbleitereinheit weist zum Beispiel ein Bilden einer Dummy-Gate-Struktur über einem Bereich eines vertikalen Halbleiter-Fin einer FinFET-Einheit und ein Bilden eines mehrschichtigen Gate-Abstandshalters auf der Dummy-Gate-Struktur auf. Der mehrschichtige Gate-Abstandshalter weist eine erste dielektrische Schicht und eine zweite dielektrische Schicht auf, wobei die erste dielektrische Schicht eine Ätzselektivität in Bezug auf den vertikalen Halbleiter-Fin und die zweite dielektrische Schicht aufweist. Bei einer Ausführungsform weist die erste dielektrische Schicht Siliciumoxycarbonitrid (SiOCN) auf, und die zweite dielektrische Schicht weist Siliciumborkohlenstoffnitrid (SiBCN) auf.

公开(公告)号：GB2495606B

公开(公告)日：2015-12-16

申请号：GB201217771

申请日：2012-10-04

Applicant: IBM

Inventor： YAMASHITA TENKO ,  ANDO TAKASHI ,  STANDAERT THEODORUS EDUARDUS ,  KANAKASABAPATHY SIVANANDA ,  KULKARNI PRANITA ,  CHANG JOSEPHINE

IPC: H01L29/78 ,  H01L29/423

Abstract: A transistor, for example a FinFET, includes a gate structure disposed over a substrate. The gate structure has a width and also a length and a height defining two opposing sidewalls of the gate structure. The transistor further includes at least one electrically conductive channel between a source region and a drain region that passes through the sidewalls of the gate structure; a dielectric layer disposed over the gate structure and portions of the electrically conductive channel that are external to the gate structure; and an air gap underlying the dielectric layer. The air gap is disposed adjacent to the sidewalls of the gate structure and functions to reduce parasitic capacitance of the transistor. At least one method to fabricate the transistor is also disclosed.

公开(公告)号：GB2508758B

公开(公告)日：2015-12-09

申请号：GB201404138

申请日：2012-05-29

Applicant: IBM

Inventor： RAGHUNATHAN SUDHARSHANAN ,  KANAKASABAPATHY SIVANANDA ,  JUNG RYAN O ,  GABOR ALLEN H ,  BURNS SEAN D ,  MCLELLAN ERIN CATHERINE

IPC: H01L21/82 ,  H01L21/311

Abstract: Embodiment of the present invention provides a method of forming a semiconductor device in a sidewall image transfer process with multiple critical dimensions. The method includes forming a multi-level dielectric layer over a plurality of mandrels, the multi-level dielectric layer having a plurality of regions covering the plurality of mandrels, the plurality of regions of the multi-level dielectric layer having different thicknesses; etching the plurality of regions of the multi-level dielectric layer into spacers by applying a directional etching process, the spacers being formed next to sidewalls of the plurality of mandrels and having different widths corresponding to the different thicknesses of the plurality of regions of the multi-level dielectric layer; removing the plurality of mandrels in-between the spacers; and transferring bottom images of the spacers into one or more layers underneath the spacers.

公开(公告)号：GB2508758A

公开(公告)日：2014-06-11

申请号：GB201404138

申请日：2012-05-29

Applicant: IBM

Inventor： RAGHUNATHAN SUDHARSHANAN ,  KANAKASABAPATHY SIVANANDA ,  JUNG RYAN O ,  GABOR ALLEN H ,  BURNS SEAN D ,  MCLELLAN ERIN CATHERINE

IPC: H01L21/033 ,  H01L21/311

Abstract: Embodiment of the present invention provides a method of forming a semiconductor device in a sidewall image transfer process with multiple critical dimensions. The method includes forming a multi-level dielectric layer over a plurality of mandrels, the multi-level dielectric layer having a plurality of regions covering the plurality of mandrels, the plurality of regions of the multi-level dielectric layer having different thicknesses; etching the plurality of regions of the multi-level dielectric layer into spacers by applying a directional etching process, the spacers being formed next to sidewalls of the plurality of mandrels and having different widths corresponding to the different thicknesses of the plurality of regions of the multi-level dielectric layer; removing the plurality of mandrels in- between the spacers; and transferring bottom images of the spacers into one or more layers underneath the spacers.