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US5667632A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of defining a line width

Assignee: NXP USA Inc
•
Filing: 1995-11-13
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Granted: 1997-09-16
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Expires: 2015-11-13
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Abstract

Abstract A method of defining a line width includes forming a spacer (45) over a layer (42) and using the spacer (45) as an etch mask (57) while etching the layer (42). In this manner, a width (47) of the spacer (45) is used to define a width or line width (47) for the layer (42). Another method of using a spacer to define a line width includes forming a spacer (14) over a substrate (11), depositing a layer (15) over the substrate (11) and the spacer (14), planarizing the layer (15) to expose the spacer (14), and removing the spacer (14) to form an opening (19) over the substrate (11), wherein the opening (19) has a width or line width (17) of the spacer (14).

Inventors

  • 👤 Richard S. Burton
  • 👤 Gordon M. Grivna

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 12:07
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/01; H10D64/013; H10D64/01302; H10D64/01304; H10D64/01326; H10D64/01328; H10D64/012; H10D64/0124; H10D64/0125; H10D64/0126; H10D64/01324; H10D64/01332; H10D64/01334; H10P; H10P76/00; H10P76/40; H10P76/408; H10P76/4085

Claims Analysis

Total Claims: 30
Claim 1
Independent Claim 54 words
A method of defining a line width, the method comprising the steps of: providing a spacer having a width; depositing a layer over the spacer; and using the width of the spacer to define the line width by removing the spacer to form a hole in the layer, the hole having the line width.
Claim 2
Independent Claim 54 words
A method of defining a line width, the method comprising the steps of: providing a spacer having a width; depositing a layer over the spacer; and using the width of the spacer to define the line width by removing the spacer to form a hole in the layer, the hole having the line width.
Claim 3
Dependent Claim 19 words
The method according to claim 1, further comprising the step of providing an etch stop layer under the spacer.
Claim 4
Dependent Claim 41 words
The method according to claim 2, further including etching the etch stop layer with a first etchant wherein the step of using the width of the spacer to define the line width includes using a different etchant to remove the spacer.
Claim 5
Dependent Claim 26 words
The method according to claim 1, further comprising the steps of: providing a substrate under the spacer; and depositing an electrically conductive layer in the opening.
Claim 6
Dependent Claim 28 words
The method according to claim 4, wherein the step of depositing the electrically conductive layer in the opening includes physically contacting the substrate with the electrically conductive layer.
Claim 7
Independent Claim 98 words
A method of making a semiconductor device, the method comprising the steps of: providing a spacer having a width; using the width of the spacer to define a line width, wherein the step of using the width of the spacer to define the line width includes using the spacer as an etch mask; providing a substrate under the spacer; and forming a temporary structure over the substrate, wherein the step of using the width of the spacer to define the line width includes using the width of the spacer to define a line width of the temporary structure.
Claim 8
Independent Claim 98 words
A method of making a semiconductor device, the method comprising the steps of: providing a spacer having a width; using the width of the spacer to define a line width, wherein the step of using the width of the spacer to define the line width includes using the spacer as an etch mask; providing a substrate under the spacer; and forming a temporary structure over the substrate, wherein the step of using the width of the spacer to define the line width includes using the width of the spacer to define a line width of the temporary structure.
Claim 9
Dependent Claim 78 words
The method according to claim 6, further comprising the steps of: removing the spacer after the step of forming the temporary structure; disposing an electrically insulating layer over the substrate and over the temporary structure; removing a first portion of the electrically insulating layer to expose a second portion of the temporary structure; and removing the temporary structure to form an opening over the substrate, wherein the opening is defined by the line width of the temporary structure.
Claim 10
Dependent Claim 38 words
The method according to claim 7, further comprising the step of depositing an electrically conductive layer in the opening, wherein the step of removing the first portion of the electrically insulating layer includes planarizing the electrically insulating layer.
Claim 11
Dependent Claim 22 words
The method according to claim 1, wherein the step of providing the spacer includes providing a temporary structure comprised of the spacer.
Claim 12
Independent Claim 101 words
A method of manufacturing a semiconductor device, the method comprising the steps of: providing a spacer having a width; using the width of the spacer to define a line width, wherein the step of providing the spacer includes providing a temporary structure comprised of the spacer; providing a substrate under the spacer; providing an electrically insulating layer over the temporary structure and the substrate; removing a first portion of the electrically insulating layer to expose a second portion of the temporary structure; and removing the temporary structure to form an opening over the substrate, the opening defined by the temporary structure.
Claim 13
Independent Claim 101 words
A method of manufacturing a semiconductor device, the method comprising the steps of: providing a spacer having a width; using the width of the spacer to define a line width, wherein the step of providing the spacer includes providing a temporary structure comprised of the spacer; providing a substrate under the spacer; providing an electrically insulating layer over the temporary structure and the substrate; removing a first portion of the electrically insulating layer to expose a second portion of the temporary structure; and removing the temporary structure to form an opening over the substrate, the opening defined by the temporary structure.
Claim 14
Dependent Claim 37 words
The method according to claim 10, further comprising the step of depositing an electrically conductive layer in the opening, wherein the step of removing the first portion of the electrically insulating layer includes using a chemical-mechanical polish.
Claim 15
Independent Claim 60 words
A method of forming a semiconductor component, the method comprising the steps of: providing a substrate; forming a spacer having a width, the spacer located over the substrate; covering the spacer with a dielectric layer; exposing a portion of the spacer; forming an opening over the substrate by etching the spacer; and depositing an electrically conductive layer in the opening.
Claim 16
Independent Claim 60 words
A method of forming a semiconductor component, the method comprising the steps of: providing a substrate; forming a spacer having a width, the spacer located over the substrate; covering the spacer with a dielectric layer; exposing a portion of the spacer; forming an opening over the substrate by etching the spacer; and depositing an electrically conductive layer in the opening.
Claim 17
Dependent Claim 53 words
The method according to claim 12, further comprising the step of forming an etch stop layer over the substrate before the step of forming the spacer, wherein the step of forming the opening over the substrate by etching away the spacer includes stopping the etching of the spacer at the etch stop layer.
Claim 18
Dependent Claim 39 words
The method according to claim 12, wherein the step of exposing the portion of the spacer includes using a chemical-mechanical polish and wherein the step of forming the opening includes forming the opening having the width of the spacer.
Claim 19
Dependent Claim 42 words
The method according to claim 12, wherein the step of exposing the portion of the spacer includes: forming a patterned photoresist layer over the dielectric layer to expose a portion of the dielectric layer; and etching the portion of the dielectric layer.
Claim 20
Independent Claim 107 words
A method of fabricating a semiconductor component, the method comprising the steps of: providing a semiconductor substrate; depositing a first dielectric layer over the semiconductor substrate; depositing a second dielectric layer over the first dielectric layer; using the second dielectric layer to form a spacer over the first dielectric layer; using the first dielectric layer and the spacer to create a temporary structure over the semiconductor substrate; depositing a third dielectric layer over the temporary structure; planarizing the third dielectric layer to expose the temporary structure; forming an opening over the semiconductor substrate by removing the temporary structure; and depositing an electrically conductive layer in the opening.
Claim 21
Independent Claim 107 words
A method of fabricating a semiconductor component, the method comprising the steps of: providing a semiconductor substrate; depositing a first dielectric layer over the semiconductor substrate; depositing a second dielectric layer over the first dielectric layer; using the second dielectric layer to form a spacer over the first dielectric layer; using the first dielectric layer and the spacer to create a temporary structure over the semiconductor substrate; depositing a third dielectric layer over the temporary structure; planarizing the third dielectric layer to expose the temporary structure; forming an opening over the semiconductor substrate by removing the temporary structure; and depositing an electrically conductive layer in the opening.
Claim 22
Dependent Claim 66 words
The method according to claim 16, further comprising the steps of: providing a first etch stop layer between the semiconductor substrate and the first dielectric layer; providing a second etch stop layer between the first dielectric layer and the second dielectric layer; and removing portions of the first and second etch stop layers prior to the step of depositing the electrically conductive layer in the opening.
Claim 23
Dependent Claim 73 words
The method according to claim 16, wherein the step of using the second dielectric layer to form the spacer includes forming the spacer out of the second dielectric layer, wherein the spacer has a width, and wherein the step of using the first dielectric layer and the spacer to create the temporary structure includes creating the temporary structure out of the first dielectric layer, the temporary structure having the width of the spacer.
Claim 24
Independent Claim 80 words
A method of making a semiconductor component, the method comprising the steps of: providing a semiconductor substrate; depositing a gate layer over the semiconductor substrate; depositing a first dielectric layer over the gate layer; using the first dielectric layer to form a spacer over the gate layer, the spacer having a width; and transferring the width of the spacer into the gate layer to produce a gate electrode having a gate length substantially equal to the width of the spacer.
Claim 25
Independent Claim 80 words
A method of making a semiconductor component, the method comprising the steps of: providing a semiconductor substrate; depositing a gate layer over the semiconductor substrate; depositing a first dielectric layer over the gate layer; using the first dielectric layer to form a spacer over the gate layer, the spacer having a width; and transferring the width of the spacer into the gate layer to produce a gate electrode having a gate length substantially equal to the width of the spacer.
Claim 26
Independent Claim 162 words
A method of making a semiconductor component, the method comprising the steps of: providing a semiconductor substrate; depositing a gate layer over the semiconductor substrate; depositing a first dielectric layer over the gate layer; using the first dielectric layer to form a spacer over the gate layer, the spacer having a width; transferring the width of the spacer into the gate layer to produce a gate electrode having a gate length substantially equal to the width of the spacer, wherein the step of transferring the width of the spacer into the gate layer includes anisotropically etching the gate layer and wherein the step of using the first dielectric layer to form the spacer includes the steps of: etching the first dielectric layer to form a temporary structure; depositing a second dielectric layer over the first dielectric layer and over the gate layer; anisotropically etching the second dielectric layer to form the spacer adjacent to the temporary structure; and removing the temporary structure.
Claim 27
Independent Claim 162 words
A method of making a semiconductor component, the method comprising the steps of: providing a semiconductor substrate; depositing a gate layer over the semiconductor substrate; depositing a first dielectric layer over the gate layer; using the first dielectric layer to form a spacer over the gate layer, the spacer having a width; transferring the width of the spacer into the gate layer to produce a gate electrode having a gate length substantially equal to the width of the spacer, wherein the step of transferring the width of the spacer into the gate layer includes anisotropically etching the gate layer and wherein the step of using the first dielectric layer to form the spacer includes the steps of: etching the first dielectric layer to form a temporary structure; depositing a second dielectric layer over the first dielectric layer and over the gate layer; anisotropically etching the second dielectric layer to form the spacer adjacent to the temporary structure; and removing the temporary structure.
Claim 28
Dependent Claim 38 words
The method according to claim 20, further comprising the steps of: providing an etch stop layer between the gate layer and the spacer; and etching the etch stop layer while using the spacer as a first etch mask.
Claim 29
Dependent Claim 53 words
The method according to claim 21, further comprising the step of removing the spacer after the step of etching the etch stop layer and before the step of anisotropically etching the gate layer, wherein the step of anisotropically etching the gate layer includes using the etch stop layer as a second etch mask.
Claim 30
Dependent Claim 29 words
The method according to claim 21, wherein the step of anisotropically etching the gate layer includes using the etch stop layer and the spacer as a second etch mask.

References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2000-09-15 2001-03-17 2001-09-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2004-09-15 2005-03-17 2005-09-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2008-09-15 2009-03-17 2009-09-16 $7700.00 Window Closed / Lapsed

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