公开(公告)号：US11204239B2

公开(公告)日：2021-12-21

申请号：US16931832

申请日：2020-07-17

Applicant: ASML NETHERLANDS B. V.

Inventor： Kaustuve Bhattacharyya ,  Henricus Wilhelmus Maria Van Buel ,  Christophe David Fouquet ,  Hendrik Jan Hidde Smilde ,  Maurits Van Der Schaar ,  Arie Jeffrey Den Boef ,  Richard Johannes Franciscus Van Haren ,  Xing Lan Liu ,  Johannes Marcus Maria Beltman ,  Andreas Fuchs ,  Omer Abubaker Omer Adam ,  Michael Kubis ,  Martin Jacobus Johan Jak

IPC: G01B11/14 ,  G03F7/20

Abstract: A diffraction measurement target that has at least a first sub-target and at least a second sub-target, and wherein (1) the first and second sub-targets each include a pair of periodic structures and the first sub-target has a different design than the second sub-target, the different design including the first sub-target periodic structures having a different pitch, feature width, space width, and/or segmentation than the second sub-target periodic structure or (2) the first and second sub-targets respectively include a first and second periodic structure in a first layer, and a third periodic structure is located at least partly underneath the first periodic structure in a second layer under the first layer and there being no periodic structure underneath the second periodic structure in the second layer, and a fourth periodic structure is located at least partly underneath the second periodic structure in a third layer under the second layer.

公开(公告)号：US20200348125A1

公开(公告)日：2020-11-05

申请号：US16931832

申请日：2020-07-17

Applicant: ASML NETHERLANDS B. V.

Inventor： Kaustuve BHATTACHARYYA ,  Henricus Wilhelmus Maria Van Buel ,  Christophe David Fouquet ,  Hendrik Jan Hidde Smilde ,  Maurits Van Der Schaar ,  Arie Jeffrey Den Boef ,  Richard Johannes Franciscus Van Haren ,  Xing Lan Liu ,  Johannes Marcus Maria Beltman ,  Andreas Fuchs ,  Omer Abubaker Omer Adam ,  Michael Kubis ,  Martin Jacobus Johan Jak

IPC: G01B11/14 ,  G03F7/20

Abstract: A diffraction measurement target that has at least a first sub-target and at least a second sub-target, and wherein (1) the first and second sub-targets each include a pair of periodic structures and the first sub-target has a different design than the second sub-target, the different design including the first sub-target periodic structures having a different pitch, feature width, space width, and/or segmentation than the second sub-target periodic structure or (2) the first and second sub-targets respectively include a first and second periodic structure in a first layer, and a third periodic structure is located at least partly underneath the first periodic structure in a second layer under the first layer and there being no periodic structure underneath the second periodic structure in the second layer, and a fourth periodic structure is located at least partly underneath the second periodic structure in a third layer under the second layer.

公开(公告)号：US20150346113A1

公开(公告)日：2015-12-03

申请号：US14825765

申请日：2015-08-13

Applicant: ASML Netherlands B. V.

Inventor： Marcus Adrianus Van De Kerkhof ,  Maurits Van Der Schaar ,  Hendrik Jan Hidde Smilde

IPC: G01N21/95 ,  G01N21/47 ,  G02B5/18 ,  G03F7/20

CPC classification number: G01N21/9501 ,  G01N21/4738 ,  G01N2201/06113 ,  G01N2201/10 ,  G02B5/1823 ,  G02B5/1861 ,  G03F7/70058 ,  G03F7/70633 ,  G03F7/70683 ,  G03F9/70 ,  G03F9/7046 ,  G03F9/7076 ,  H01L23/544 ,  H01L2924/0002 ,  Y10T428/24612 ,  H01L2924/00

Abstract: A second set of superimposed gratings are superposed over a first set of superimposed gratings. The second set of gratings have a different periodicity from the first set of gratings or a different orientation. Consequently the first order diffraction pattern from the second set of superimposed gratings can be distinguished from the first order diffraction pattern from the first set of superimposed gratings.

Abstract translation: 第二组叠加的光栅叠加在第一组叠加的光栅上。 第二组光栅具有与第一组光栅不同的周期性或不同的取向。 因此，来自第二组叠加光栅的一阶衍射图可以与来自第一组叠加光栅的一阶衍射图案区分开。