Source: https://patents.google.com/patent/CN103488041A/en
Timestamp: 2020-01-26 02:22:52
Document Index: 631774008

Matched Legal Cases: ['Application No.60', 'application No.11', 'art 310', 'art 310', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 370', 'art 592', 'art 592', 'art 592', 'art 592', 'art 592', 'art 692', 'art 692', 'art 692']

CN103488041A - Frequency doubling using spacer mask - Google Patents
Frequency doubling using spacer mask Download PDF
CN103488041A
CN103488041A CN201310416003.9A CN201310416003A CN103488041A CN 103488041 A CN103488041 A CN 103488041A CN 201310416003 A CN201310416003 A CN 201310416003A CN 103488041 A CN103488041 A CN 103488041A
CN201310416003.9A
克里斯多佛·D·本彻尔
堀冈启治
2007-06-01 Priority to US93285807P priority Critical
2007-06-01 Priority to US60/932,858 priority
2007-10-19 Priority to US11/875,250 priority
2007-10-19 Priority to US11/875,250 priority patent/US7807578B2/en
2008-05-30 Application filed by 应用材料公司 filed Critical 应用材料公司
2014-01-01 Publication of CN103488041A publication Critical patent/CN103488041A/en
A method for fabricating a semiconductor mask is described. A semiconductor stack having a sacrificial mask and a spacer mask is first provided. The sacrificial mask is comprised of a series of lines and the spacer mask has spacer lines adjacent to the sidewalls of the series of lines. Next, the spacer mask is cropped. Finally, the sacrificial mask is removed to provide a cropped spacer mask. The cropped spacer mask doubles the frequency of the series of lines of the sacrificial mask.
Utilize the doubling frequency of spacer mask
The U.S. Provisional Application No.60/932 that this application requirement is submitted on June 1st, 2007, the U. S. application No.11/875 that on October 19th, 858 and 2007 submits, 250 right of priority, it is included in this by reference.This application be the application number that on May 30th, 2008 submits to be 2008100983642 and name be called the dividing an application of patented claim of " doubling frequency that utilizes spacer mask ".
Embodiments of the invention relate to the semiconductor processes field.More specifically, embodiments of the invention relate to the method for manufacturing semiconductor devices.
In the past few decades, the dimension reduction of the feature in integrated circuit has become the driving force of growing semi-conductor industry.Feature is narrowed down to the density that more and more less size can increase the functional unit on the limited usable area of semi-conductor chip.For example, the reduction transistor size allows the quantity of included logic and memory part on microprocessor to increase, thereby can manufacture the product with larger complexity.
But dimension reduction does not have consequence.Along with the size of the fundamental construction piece of microelectronic circuit is reduced and along with the absolute quantity of the fundamental construction piece of manufacturing in given area increases, for becoming inundatory for these constraints that build the photoetching process of pieces of patterning.Particularly, may there is containing between the minimum dimension (critical dimension) of the feature of semiconductor laminated patterning and the spacing between these sizes.Figure 1A-1C shows the cut-open view meaned according to the conventional semiconductor lithography process of prior art.
With reference to Figure 1A, photoresist layer 104 is provided at semiconductor laminated 102 tops.Mask or light shield 106 are disposed in photoresist layer 104 tops.Photoetching process comprises photoresist layer 104 is exposed to the light (hv) with specific wavelength, as shown in the arrow in Figure 1A.With reference to Figure 1B, photoresist layer 104 is developed subsequently, so that the photoresist layer 108 of patterning to be provided above semiconductor laminated 102.In other words, the part through exposure of photoresist layer 104 is removed now.The width of each feature of the photoresist layer 108 of patterning is meaned by width " x ".Spacing between each feature is meaned by spacing " y ".Usually, for the restriction of concrete photoetching process will provide critical dimension equal spacing between feature (that is, and feature x=y), as shown in Figure 1B.
With reference to figure 1C, the critical dimension of feature (that is, width " x ") can be reduced, to form the photoresist layer 110 of patterning above semiconductor laminated 102.Can reduce critical dimension by overexposure photoresist layer 104 in the lithography operations process shown in Figure 1A or the photoresist layer 108 by the patterning in modifying Figure 1B subsequently.But the cost that reduces to pay of such critical dimension is that the spacing between feature increases, as shown in the spacing in Fig. 1 C " y ".In other words, the I of each feature in the photoresist layer 110 of patterning realizes may having containing between the spacing between size and each feature.
Therefore, this paper describes the method for the doubling frequency by semiconductor lithography process.
A kind of method for the manufacture of semiconductor mask, described method comprises: provide and have the semiconductor laminated of sacrificial mask, wherein said sacrificial mask consists of a series of lines, and each line in described a series of lines has sidewall and end, described semiconductor laminated above and with described sacrificial mask deposited spacers layer conformally, the described spacer layer of etching, described etching provides spacer mask and exposes the top surface of described sacrificial mask, wherein said spacer mask has the sept line of the adjacent sidewalls of each line in the described a series of lines with described sacrificial mask, and the part of the end that holds each line in described a series of line of described spacer mask, wherein with described a series of lines of described sacrificial mask in each line adjacent sidewalls described sept line and with the described sept line of adjacent sidewalls of every other line in described a series of lines of described sacrificial mask be discontinuous, deposition patterning photoresist layer above described spacer mask and described sacrificial mask, with the expose portion of the end that forms each line in the described a series of lines of holding of described spacer mask, the described expose portion of the described spacer mask of etching, thus the described part of the end by removing each line in the described a series of lines of holding of described spacer mask is pruned described spacer mask, and, after the described spacer mask of etching, remove described sacrificial mask so that the spacer mask through pruning to be provided.
In the accompanying drawings, as example and the unrestricted embodiments of the invention that show.
Figure 1A-1C shows the cut-open view meaned according to the conventional semiconductor lithography process of prior art.
Fig. 2 shows the illustrative methods according to the spacer mask manufacturing process of the embodiment of the present invention.
Fig. 3 A-3H shows and means according to the series of process of the process flow diagram according to Fig. 2 of the embodiment of the present invention when the cut-open view and the top view that are applied to when semiconductor laminated.
Fig. 4 A-4B shows the top view according to the illustrative methods of the spacer mask manufacturing process of the embodiment of the present invention.
Fig. 5 A-5D shows the cut-open view according to the illustrative methods of the spacer mask manufacturing process of the embodiment of the present invention.
Fig. 6 A-6B shows the top view according to the illustrative methods of the spacer mask manufacturing process of the embodiment of the present invention.
Below use description to the method for the doubling frequency of semiconductor lithography process.In the following description, in order providing, to of the present invention, to understand fully, to have set forth a large amount of details, for example create conditions and material prescription.Yet, it will be apparent to those skilled in the art that in the situation that do not have these details also can realize the present invention.In other examples, do not have to describe the well-known characteristic such as integrated circuit (IC) design layout or photoresist developing technique in detail, so that not meaningless topotype is stuck with paste the present invention.In addition, should be appreciated that, the various embodiment shown in accompanying drawing are exemplary expressions, needn't be drawn in proportion.
In one embodiment, provide the method for the manufacture of semiconductor mask.Can at first provide and there is the semiconductor laminated of sacrificial mask and spacer mask.In one embodiment, sacrificial mask comprises a series of line, and spacer mask has the sept line adjacent with the sidewall of above-mentioned a series of line.Then, spacer mask is pruned to provide the spacer mask through pruning, and, after pruning spacer mask, removes sacrificial mask.In specific embodiment, spacer mask forms by first spacer layer being deposited on to semiconductor laminated top, and conformal with sacrificial mask.Spacer layer is etched, and so that the spacer mask with sept line adjacent with the sidewall of a series of lines of sacrificial mask to be provided, and exposes the top surface of sacrificial mask.Then, deposition and patterning photoresist layer on spacer mask, to expose the part of spacer mask.The expose portion of spacer mask is etched, to prune spacer mask.Finally, sacrificial mask is removed, and only stays the spacer mask through pruning.
By manufacturing spacer mask, the frequency of photoengraving pattern is doubled.For example, according to embodiments of the invention, manufactured the spacer mask with the sept line formed in abutting connection with the sidewall of the sacrificial mask of lithographic patterning.Therefore, for each line in sacrificial mask, produce two sept lines of spacer mask.Therefore, after removing sacrificial mask, can manufacture following semiconductor patterning mask, this mask provides essentially identical critical dimension (or identical characteristic width) for each line, but will have double density in local area-specific.For example, according to embodiments of the invention, the pitch of sacrificial mask is chosen as 4, in order to the spacer mask that pitch is 2 finally is provided.
For the sept line of end that the line that does not hold sacrificial mask is provided, spacer mask may need to prune.By till sacrificial mask being remained into to spacer mask and having been pruned, can prevent in the cut operation process damage to spacer mask.For example, according to embodiments of the invention, spacer mask comprises spacer regions, the line in itself and sacrificial mask (comprise each line end around) adjoining the connecing of straight wall.The every a pair of spacer regions of the spacer mask relevant to each line of sacrificial mask is connected.It may be desirable producing disjunct line each other in spacer mask.In one embodiment, the part of the end that holds the line in sacrificial mask of spacer mask is pruned in patterning/etching technics.In the situation that there is not sacrificial mask, spacer mask may not have the integrality that is enough to tolerate patterning/etching technics.According to one embodiment of present invention, in pruning technological process, sacrificial mask is retained, to be provided in whole technological process the support structure to spacer mask.After pruning spacer mask, sacrificial mask can be removed, so that the spacer mask through pruning only to be provided.In specific embodiment, the image of the spacer mask through pruning is transferred to semiconductor laminated subsequently.
The manufacture of spacer mask can comprise the pruning operation, and in revising operation, sacrificial mask is retained thinks that spacer mask provides structural intergrity.Fig. 2 comprises and means flow process Figure 200 of the illustrative methods of spacer mask manufacturing process according to an embodiment of the invention.Fig. 3 A-3H shows and means according to the series of process of the process flow diagram according to Fig. 2 of the embodiment of the present invention when the cut-open view and the top view that are applied to when semiconductor laminated.
The operation 202 of reference flowchart Figure 200 and 204 and corresponding Fig. 3 A, patterned photoresist layer 302 is provided at semiconductor laminated 300 tops.In one embodiment, semiconductor laminated 300 the first mask stack 304 by semiconductor layer 308 tops and the second mask stack 306 form.
Patterned photoresist layer 302 can consist of any material that is applicable to photoetching process.In one embodiment, patterned photoresist layer 302 can form by following operation: then the overlayer of masking photoresist material at first is exposed to light source.Then can cover photoresist layer by development and form patterned photoresist layer 302.In an embodiment, when the development photoresist layer, the part that is exposed to light source of photoresist layer is removed.Therefore, in the present embodiment, patterned photoresist layer 302 consists of eurymeric photoresist material.In specific embodiment, patterned photoresist layer 302 consists of the eurymeric photoresist material that is selected from 248nm photoresist, 193nm photoresist, 157nm photoresist and has a phenol resin matrix of two azo naphthoquinones photosensitizers.In another embodiment, when the development photoresist layer, the part that is exposed to light source of photoresist layer is retained.Therefore, in the present embodiment, patterned photoresist layer 302 consists of the negative photoresist material.In specific embodiment, patterned photoresist layer 302 forms by being selected from the poly-negative photoresist material along isoprene and poly-cinnamic acid vinyl esters.
Patterned photoresist layer 302 has the size that is suitable for arbitrarily the spacer mask manufacturing process.According to embodiments of the invention, it is relevant to the expectation critical dimension essence of features in semiconductor devices that the width " x " of each feature of patterned photoresist layer 302 is selected as, and for example defines the width in the space of gate electrode.In one embodiment, the scope that width " x " is 10-100nm.Spacing between line " y " can be selected to optimization frequency and double scheme.According to embodiments of the invention, the width " x " of each feature that subsequently spacer mask of manufacture is decided to be to the width of the sept line that makes spacer mask and patterned photoresist layer 302 is basic identical.In addition, subsequently the spacing between the sept line of formation is decided to be and makes it substantially equal the width of each spacer regions.Therefore, in one embodiment, because frequency will finally be doubled, thus three times of spacing " y " value of being substantially equal to " x " between each feature in patterned photoresist layer 302, as shown in Figure 3A.The pitch of patterned photoresist layer 302 is chosen as and is roughly 4, in order to finally provide, has the spacer mask that pitch is roughly 2 sept line.In specific embodiment, the 193nm photolithography is used to produce patterned photoresist layer 302, and it has the characteristic width of 45nm roughly and the spacing between the feature of 135nm roughly.
The spacing of the roughly 3:1 of the feature of patterned photoresist layer 302: the width ratio can be realized in the following way: overexposure eurymeric photoresist layer or modify photoresist layer after photoetching/developing process when exposing operation.In one embodiment, patterned photoresist layer 302 consists of the 193nm eurymeric photoresist of modifying after utilizing the plasma etching chemical method to carry out developing.Although for the doubling frequency scheme, the desired width of each feature in patterned photoresist layer 302 be patterned photoresist layer 302 pitch 1/4, but the initial target width may need slightly wide, the etching technics with compensation for patterning the first mask stack 304.Therefore, according to embodiments of the invention, the original width of each line of patterned photoresist layer 302 is decided to be between 0.281 and 0.312 times in pitch.
The operation 206 of reference flowchart Figure 200 and corresponding Fig. 3 B, the image of patterned photoresist layer 302 is transferred to the first mask stack 304 by etching technics, to form sacrificial mask 310.Etching technics for the transition diagram picture can be any technique of the first mask stack 304 that is suitable for essentially identical image is transferred to from patterned photoresist layer 302.
The first mask stack 304 and sacrificial mask 310 can consist of any material or combination of materials that is suitable for serving as sacrificial mask in the spacer mask manufacturing process.According to embodiments of the invention, the first mask stack 304 consists of a kind of material, as depicted in Figure 3 A shown in dash area.The first mask stack 304 formed by a kind of material form and thickness can be suitable for using patterned photoresist layer 302 be there is no to the etching technics of impact carrys out etching.In one embodiment, size and the etching characteristic of the first mask stack 304 that selection consists of a kind of material, to adapt to patterning, and, in this patterning process, patterned photoresist layer 302 is basic keeps complete.In specific embodiment, patterned photoresist layer 302 consists of carbon-based material, and the first mask stack 304 consists of the material that is selected from silicon nitride, monox and unformed or polysilicon.In specific embodiment, the first mask stack 304 consists of silicon nitride substantially, and the etching technics utilization that is used to form sacrificial mask 310 is selected from CH 2f 2and CHF 3gas.In another specific embodiment, the first mask stack 304 consists of monox substantially, and the etching technics utilization that is used to form sacrificial mask 310 is selected from C 4f 8and CHF 3gas.In another specific embodiment, the first mask stack 304 consists of unformed or polysilicon substantially, and the etching technics utilization that is used to form sacrificial mask 310 is selected from Cl 2gas with HBr.According to embodiments of the invention, the thickness of the first mask stack 304 that selection consists of a kind of material, double the formation of the spacer mask subsequently in scheme with optimization frequency.The thickness of the first mask stack 304 may diminish to the spacer mask line that is enough to prevent the spacer mask that forms subsequently and collapses, and controls even as big as the critical dimension that allows the spacer mask line.The 4.06-5.625 of the score width that the thickness of the first mask stack 304 consisted of a kind of material in one embodiment, is sacrificial mask 310 doubly.
According to another embodiment of the invention, the first mask stack 304 consists of the first hard mask layer 304A of the first mask layer 304B top, as shown as two layers describing in Fig. 3 A.Therefore, sacrificial mask 310 consists of the sacrificial hard mask part 310A of sacrificial mask part 310B top, as shown in Figure 3 B.In one embodiment, with two independent etching operation, utilize picture patternization the first hard mask layer 304A and the first mask layer 304B of patterned photoresist layer 302.The first hard mask layer 304A can by any be suitable for utilizing for patterned photoresist layer 302, substantially do not have influential etching technics to come the material of etching to form.In one embodiment, select size and the etching characteristic of the first hard mask layer 304A, to adapt to patterning, and, in this patterning process, patterned photoresist layer 302 is basic keeps complete.In specific embodiment, the first mask layer 304B(its in the first hard mask layer 304A below) material similar to the etching characteristic of patterned photoresist layer 302 by etch features form.Therefore, the first hard mask layer 304A is used to preserve the image from patterned photoresist layer 302 in the etching process of the first mask layer 304B subsequently.In specific embodiment, patterned photoresist layer 302 and the first mask layer 304B consist of carbon-based material, and the first hard mask layer 304A consists of the material that is selected from silicon nitride, monox and unformed or polysilicon.In specific embodiment, the first hard mask layer 304A consists of silicon nitride substantially, and the etching technics utilization had optionally for patterning the first hard mask layer 304A for patterned photoresist layer 302 and the first mask layer 304B is selected from CH 2f 2and CHF 3gas.In another specific embodiment, the first hard mask layer 304A consists of monox substantially, and the etching technics utilization had optionally for patterning the first hard mask layer 304A for patterned photoresist layer 302 and the first mask layer 304B is selected from C 4f 8and CHF 3gas.In another specific embodiment, the first hard mask layer 304A consists of unformed or polysilicon substantially, and the etching technics utilization had optionally for patterning the first hard mask layer 304A for patterned photoresist layer 302 and the first mask layer 304B is selected from Cl 2gas with HBr.The thickness of the first hard mask layer 304A may diminish to be enough to allow the high selectivity etching with respect to patterned photoresist layer 302, and even as big as avoiding undesirably exposing the pinprick of the first mask layer 304B.In one embodiment, the scope that the thickness of the first hard mask layer 304A is 20-50nm.
In the situation that the first mask stack 304 consists of the first hard mask layer 304A above the first mask layer 304B, the first mask layer 304B can be suitable for withstanding the material that controlled etching technics and spacer mask subsequently form technique and be formed by any.In one embodiment, the etching characteristic of the first mask layer 304B and patterned photoresist layer 302 is similar.In specific embodiment, select patterned photoresist layer 302 and the thickness of the first mask layer 304B, so that all parts of the patterned photoresist layer 302 retained are removed in the etching process of the first mask layer 304B after the etching of the first hard mask layer 304A.For example, according to embodiments of the invention, patterned photoresist layer 302 and the first mask layer 304B both consist of carbon atom substantially.In one embodiment, the first mask layer 304B is by the formed sp of the chemical vapor deposition method of utilizing the hydrocarbon precursor molecule 3(diamond-type)-, sp 2(graphite type) and sp 1(RESEARCH OF PYROCARBON type)-hydridization carbon atom forms.Such film can be as amorphous carbon film or Advanced Patterning Film in prior art tMand known (APF).In specific embodiment, the first mask layer 304B consists of such amorphous carbon film, and by selecting free O 2and N 2combination or CH 4and N 2with O 2the group that forms of combination in gas etching.In specific embodiment, in the same etching operation with for patterning the first mask layer 304B, remove substantially whole patterned photoresist layers 302.The thickness of the first mask layer 304B may diminish to the spacer mask line that is enough to prevent the spacer mask that forms subsequently and collapses, and controls even as big as the critical dimension that allows the spacer mask line.The 4.06-5.625 of the score width that the gross thickness of the first mask stack 304 consisted of the first hard mask layer 304A and the first mask layer 304B in one embodiment, is sacrificial mask 310 doubly.
Refer again to Fig. 3 B, for the second mask stack 306 optionally shown in patterning first mask stack 304(Fig. 3 A), to form sacrificial mask 310.The second mask stack 306 consists of the second hard mask layer 306A of the second mask layer 306B top, as shown in Figure 3 B.The second hard mask layer 306A can have and is suitable for protecting the second mask layer 306B to avoid being used to form any performance of impact of the etching technics of sacrificial mask 310.According to embodiments of the invention, the first mask stack 304 consists of a kind of material, and by with respect to the second hard mask layer 306A selective etch.In one embodiment, the first mask stack 304 consists of silit, and the second hard mask layer 306A consists of the material that is selected from monox and unformed or polysilicon.In another embodiment, the first mask stack 304 consists of monox, and the second hard mask layer 306A consists of the material that is selected from silicon nitride and unformed or polysilicon.In another embodiment, the first mask stack 304 consists of unformed or polysilicon, and the second hard mask layer 306A consists of the material that is selected from silicon nitride and monox.According to another embodiment of the invention, the first mask stack 304 consists of the first hard mask layer 304A and the first mask layer 304B.In one embodiment, the first mask layer 304B consists of amorphous carbon film, and by selecting free O 2and N 2combination or CH 4and N 2with O 2the group that forms of combination in gas etching, and the second hard mask layer 306A consists of the material that is selected from silicon nitride, monox and unformed or polysilicon.The thickness of the second hard mask layer 306A may diminish to be enough to allow the high selectivity etching with respect to the second mask layer 306B subsequently, and may undesirably the second mask layer 306B be exposed to the pinprick of the etching technics that is applied to the first mask stack 304 even as big as avoiding.In one embodiment, the scope that the thickness of the second hard mask layer 306A is 15-40nm.
The operation 208 of reference flowchart Figure 200 and corresponding Fig. 3 C, spacer layer 312 by conformal deposited on sacrificial mask 310 and above the second hard mask layer 306A.Spacer layer 312 is for becoming the most at last the material source for the spacer mask of doubling frequency scheme.
Spacer layer 312 can consist of any material that is suitable for being formed for the reliable mask of etching technics subsequently.According to embodiments of the invention, spacer layer 312 consists of the material that is selected from silicon nitride, monox and unformed or polysilicon.Spacer layer 312 can be suitable for providing the technique of conforma layer (as shown in Figure 3 C) to deposit on the sidewall of sacrificial mask 310 by any.In one embodiment, spacer layer 312 deposits by the chemical vapor deposition (CVD) technology that is selected from molecule organic C VD, low pressure chemical vapor deposition and plasma enhanced CVD.Can select the thickness of spacer layer 312, to determine the width of the feature in the spacer mask formed subsequently.Therefore, according to embodiments of the invention, the width of the feature of the thickness of spacer layer 312 and sacrificial mask 310 is basic identical, as shown in Figure 3 C.Although, for the doubling frequency scheme, the ideal thickness of spacer layer 312 is identical with the width of the feature of sacrificial mask 310, the initial target width may need slightly wide, the etching technics with compensation for patterning spacer layer 312.In one embodiment, roughly 1.06 times of the width of the feature that the thickness of spacer layer 312 is sacrificial mask 310,1.06 times of the desired character width of the line in the spacer mask formed subsequently.
Refer again to the operation 208 of flow process Figure 200 and, with reference now to corresponding Fig. 3 D, spacer layer 312 is etched, so that spacer mask 314 to be provided, and expose the top surface of sacrificial mask 310 and the second hard mask layer 306A.The sidewall of the feature of the line of spacer mask 314 and sacrificial mask 310 is conformal.Therefore, for each line of sacrificial mask 310, there are two lines 314 from sacrificial mask, as shown in Figure 3 D.
Spacer layer 312 can be suitable for providing the technique of the size of good control to carry out etching by any, with the width of the critical dimension that for example keeps sacrificial mask 310.According to embodiments of the invention, spacer layer 312 is etched, until the feature of the line of spacer mask 314 and sacrificial mask 310 has essentially identical height, as shown in Figure 3 D.In another embodiment, the line of spacer mask 314 is slightly recessed into the below of top surface of the feature of sacrificial mask 310, with guarantee above the line of spacer mask 314 and between the continuity of spacer layer 312 be broken.Can etching spacer layer 312, make the sept line of spacer mask 314 keep most of original thickness of spacer layer 312.In specific embodiment, the width of the interface of the width of the top surface of each line of spacer mask 314 and spacer mask 314 and the second hard mask layer 306A is basic identical, as shown in Figure 3 D.
Also can be under the high Etch selectivity with respect to sacrificial mask 310 and the second hard mask layer 306A, etching spacer layer 312, for example to form spacer mask 314(, Fig. 3 D).In specific embodiment, sacrificial mask 310 is single layer mask, and the Etch selectivity of expectation is for this individual layer.In another specific embodiment, sacrificial mask 310 is layer laminate, and the Etch selectivity of expectation is for sacrificial hard mask part, or for the material of the first hard mask layer 304A.According to embodiments of the invention, spacer layer 312 forms with the different material of material of spacer mask 314 by the top from sacrificial mask 310 and the second hard mask layer 306A.In one embodiment, the top of sacrificial mask 310 consists of silicon nitride, and the second hard mask layer 306A consists of monox, and spacer layer 312 consists of unformed or polysilicon, and utilizes and adopt by Cl 2or the dry etch process of the plasma of HBr γ-ray emission carrys out etching, to form spacer mask 314.In another embodiment, the top of sacrificial mask 310 consists of monox, and the second hard mask layer 306A consists of silicon nitride, and spacer layer 312 consists of unformed or polysilicon, and utilizes and adopt by Cl 2or the dry etch process of the plasma of HBr γ-ray emission carrys out etching, to form spacer mask 314.In another embodiment, the top of sacrificial mask 310 consists of unformed or polysilicon, and the second hard mask layer 306A consists of silicon nitride, and spacer layer 312 consists of monox, and utilizes and adopt by C 4f 8the dry etch process of the plasma of γ-ray emission is carried out etching, to form spacer mask 314.In another embodiment, the top of sacrificial mask 310 consists of unformed or polysilicon, and the second hard mask layer 306A consists of monox, and spacer layer 312 consists of silicon nitride, and utilizes and adopt by CH 2f 2the dry etch process of the plasma of γ-ray emission is carried out etching, to form spacer mask 314.In another embodiment, the top of sacrificial mask 310 consists of monox, and the second hard mask layer 306A consists of unformed or polysilicon, and spacer layer 312 consists of silicon nitride, and utilizes and adopt by CHF 3and CH 2f 2the dry etch process of the plasma of the combination results of gas is carried out etching, to form spacer mask 314.In another embodiment, the top of sacrificial mask 310 consists of silicon nitride, and the second hard mask layer 306A consists of unformed or polysilicon, and spacer layer 312 consists of monox, and utilizes and adopt by CHF 3the dry etch process of the plasma of γ-ray emission is carried out etching, to form spacer mask 314.In specific embodiments of the invention, the etching technics that is used to form spacer mask 314 reaches terminal when exposing the top surface of sacrificial mask 310 and the second hard mask layer 306A.In specific embodiment, apply slight overetch after end point determination, to guarantee that spacer mask 314 for example, is discontinuous to (, line is between line) between feature in the feature of sacrificial mask 310.
The operation 210 of reference flowchart Figure 200 and corresponding Fig. 3 E and 3E ', photoresist lamination 320 is deposited over the expose portion top of spacer mask 314 tops and sacrificial mask 310 and the second hard mask layer 306A.In the present embodiment, photoresist lamination 320 was deposited usually before spacer mask 314.In certain embodiments, make from the sept line of spacer mask 314 discontinuous between the adjacent lines of sacrificial mask 310, as shown in Figure 3 D all.But, to the sept line of the spacer mask 314 relevant from the same line of sacrificial mask 310 end around each line of sacrificial mask 310, keeping continuously, the end 316 of the spacer mask 314 as shown in the top view of Fig. 3 E ' is described.May it is desirable to, for semiconductor devices manufacture subsequently, break such sept line between continuity.Therefore, according to embodiments of the invention, when patterning photoresist lamination 320, end 316 is exposed by window 330, as shown in Fig. 3 E '.
Get back to Fig. 3 E, photoresist lamination 320 can consist of the described material of any patterned photoresist layer 302 for Fig. 3 A.In addition, photoresist lamination 320 can comprise bottom antireflective coating (BARC) layer 322 between photoresist layer 324 and spacer mask 314, thinks that photoresist layer 324 provides flat surfaces, as shown in Fig. 3 E.In one embodiment, comprise exposure and the development of the photoresist layer 324 of the basal surface with substantially flat for the photoetching process of patterning photoresist lamination 320.In specific embodiment, the BARC layer is the spin-coating glass material with organic group.In another embodiment, photoresist lamination 320 consists of photoresist layer on the whole.
Photoresist lamination 320 can deposit for photoresist lamination 320 provides the technique of planar top surface by any.For example, according to embodiments of the invention, photoresist lamination 320 comprises the photoresist layer 324 of BARC layer 322 top, and photoresist layer 324 and BARC layer 322 are both deposited by spin coating proceeding.Can produce and be enough to topple over the thin feature of spacer mask or the power of line for the spin coating proceeding that deposits BARC layer 322 or photoresist layer (in the situation that photoresist lamination 320 does not comprise the BARC layer).For example, spin coating proceeding can produce the power of the line that is enough to topple over the independent setting in spacer mask 314.Therefore, according to embodiments of the invention, sacrificial mask 310 is pruned in technique and is retained at whole sept, so that the support structure for each sept line in spacer mask 314 to be provided.In specific embodiment, by retaining sacrificial mask 310, for depositing the spin coating proceeding of photoresist lamination 320, do not have not to be dumped from the sept line of spacer mask 314.
Photoresist lamination 320 can carry out patterning by the described photoetching process of any patterning for the patterned photoresist layer 302 in Fig. 3 A.In one embodiment, photoresist lamination 320 is patterned, to form the window 330 of the end 316 that exposes spacer mask 314.The size of window 330 can be any size that is suitable for pruning spacer mask 314.Zone 330 can at least expose the whole end 316 of spacer mask 314.According to embodiments of the invention, the size of selection window 330, thus also expose the part of sacrificial mask 310.Therefore, according to an embodiment, select size and the position of the window 330 in photoresist lamination 320, to allow patterning and to prune any slight shift in technique.
The operation 212 of reference flowchart Figure 200 and corresponding top view 3E ', spacer mask 314 is pruned, to form the spacer mask 340 through pruning.Spacer mask 314 can be by any removal spacer mask 314 the etching technics of expose portion prune.As shown in the figure, end 316 is selectively removed with respect to photoresist lamination 320 and the second hard mask layer 306A.Etching needn't have selectivity for the expose portion of sacrificial mask 310.But, according to an embodiment, the pruning etching technics has selectivity for the expose portion of sacrificial mask 310, as shown in Fig. 3 F.Therefore, can be used to form the spacer mask 340 through pruning in conjunction with Fig. 3 C and 3D for the described any material of the etching of spacer layer 312 and etching technics combination.
The operation 214 of reference flowchart Figure 200 and corresponding Fig. 3 G and 3G ', photoresist lamination 320 and sacrificial mask 310 are removed.Therefore, according to embodiments of the invention, sacrificial mask 310 is retained, at whole pruning spacer mask 314, with formation, in the process of the spacer mask 340 through pruning, to provide support structure.But, once the spacer mask through pruning is formed, sacrificial mask 310 just can be removed, to complete the doubling frequency mask-making technology.
Photoresist lamination 320 can the technological operation identical in the removal with sacrificial mask 310 in or in technological operation formerly, be removed.In one embodiment, the photoresist lamination consists of carbonaceous material, and operates or utilize O in wet method formerly 2and N 2in the dry ashing operation of gas, be removed.Sacrificial mask 310 can be removed by any technology that has high selectivity for the spacer mask 340 through pruning and the second hard mask layer 306A.According to embodiments of the invention, sacrificial mask 310 consists of an individual layer, and with respect to the spacer mask 340 through pruning, is selectively removed in single technological operation.In one embodiment, the spacer mask 340 through pruning consists of unformed or polysilicon, and the second hard mask layer 306A consists of monox, and sacrificial mask 310 consists of silicon nitride substantially, and by being selected from hot H 3pO 4the single etching operation of wet etching or SiCoNi etching is removed.In another embodiment, spacer mask 340 through pruning consists of unformed or polysilicon, the second hard mask layer 306A consists of silicon nitride, and sacrificial mask 310 consists of monox substantially, and remove by the single etching operation that is selected from aqueous hydrofluoric acid wet etching or SiCoNi etching.In another embodiment, the spacer mask 340 through pruning consists of monox, and the second hard mask layer 306A consists of silicon nitride, and sacrificial mask 310 consists of unformed or polysilicon substantially, and by being selected from Cl 2plasma etching and CF 4/ O 2the single etching operation of plasma etching is removed.In another embodiment, the spacer mask 340 through pruning consists of silicon nitride, and the second hard mask layer 306A consists of monox, and sacrificial mask 310 consists of unformed or polysilicon substantially, and by being selected from Cl 2plasma etching and CF 4/ O 2the single etching operation of plasma etching is removed.In another embodiment, spacer mask 340 through pruning consists of silicon nitride, the second hard mask layer 306A consists of unformed or polysilicon, and sacrificial mask 310 consists of monox substantially, and remove by the single etching operation that is selected from aqueous hydrofluoric acid wet etching or SiCoNi etching.In another embodiment, the spacer mask 340 through pruning consists of monox, and the second hard mask layer 306A consists of unformed or polysilicon, and sacrificial mask 310 consists of silicon nitride substantially, and by being selected from hot H 3pO 4the single etching operation of wet etching or SiCoNi etching is removed.
In alternate embodiment, sacrificial mask 310 partly consists of the sacrificial hard mask of sacrificial mask part top, as described in the alternate embodiment relevant to Fig. 3 B.For example, in one embodiment, sacrificial hard mask part consists of the material that is selected from silicon nitride, monox and unformed or polysilicon, and the sacrificial mask part consists of amorphous carbon material, and described amorphous carbon material is all in this way for the described amorphous carbon material of the first mask layer 304B.Therefore, according to embodiments of the invention, above-mentioned enforcement is used to respect to spacer mask 340 and the second hard mask layer 306A selective removal sacrificial hard mask part through pruning for same combination of materials and the etching technics of the spacer mask 340 with respect to through pruning and the second hard mask layer 306A selective removal sacrificial mask 310.The sacrificial mask part below sacrificial hard mask part of stacked sacrificial mask can be removed substantially in the same etching operation for removing sacrificial hard mask part.Perhaps, may need the second etching operation, to remove the sacrificial mask part.In one embodiment, the sacrificial mask part consists of agraphitic carbon, and utilization has by being selected from O 2and N 2combination or CH 4, N 2and O 2the gas of the combination dry etching that forms plasma remove.
The operation 216 of reference flowchart Figure 200 and corresponding Fig. 3 H, the image of the spacer mask 340 through pruning is transferred to the second mask stack 306, to form etching mask 370 above semiconductor layer 308.In one embodiment, the second mask stack 306 consists of a kind of material substantially, and is etched to form etching mask 370 in single etching operation.In specific embodiment, the second mask stack 306 consists of a kind of material that is selected from silicon nitride, monox and unformed or polysilicon substantially.In alternative embodiment, the second mask stack 306 consists of the second hard mask layer 306A of the second mask layer 306B top, as for as shown in 3B and described.In one embodiment, etching mask 370 consists of hard mask part 370A and mask part 370B, as shown in Fig. 3 H.Thereby for the second hard mask layer 306A(, hard mask part 370A) material forms and the embodiment of thickness is described in conjunction with Fig. 3 B.According to embodiments of the invention, in the image of the spacer mask 340 through the pruning etching operation different at the patterning operations from finally being used to form mask part 370B, be transferred to the second hard mask layer 306A.In one embodiment, the second hard mask layer 306A consists of unformed or polysilicon substantially, and utilizes employing CHF 3the dry etching of gas carries out etching, to form hard mask part 370A.In another embodiment, the second hard mask layer 306A consists of monox substantially, and utilizes employing to be selected from Cl 2combination and CH with HBr 2f 2the dry etching of gas carry out etching, to form hard mask part 370A.In another embodiment, the second hard mask layer 306A consists of silicon nitride substantially, and utilizes employing to be selected from C 4f 8, Cl 2carry out etching with the dry etching of the gas of HBr, to form hard mask part 370A.
According to embodiments of the invention, in the second etching operation, the image of the spacer mask 340 through pruning is transferred to mask part 370B from hard mask part 370A.Thereby the mask part 370B of the second mask layer 306B(etching mask 370) can by any be suitable for substantially withstanding for the material of the etching technics of patterned semiconductor layer 308 subsequently form.In one embodiment, the second mask layer 306B consists of amorphous carbon material, and described amorphous carbon material is all in this way for the described amorphous carbon material of composition embodiment of the first mask layer 304B.In specific embodiment, thus the second mask layer 306B(, the mask part 370B of etching mask 370) thickness each line that is etching mask 370 width 3.125-6.875 doubly.The second mask layer 306B can be by any maintenance etching mask 370 the etching technics of substantially vertical profile of each line carry out etching, to form mask part 370B, as shown in Fig. 3 H.In one embodiment, the second mask layer 306B consists of agraphitic carbon, and utilization has by being selected from O 2and N 2combination or CH 4, N 2and O 2the gas of the combination dry etching that forms plasma remove.
By various embodiment, one or more methods for the manufacture of etching mask 370 have been described, described etching mask 370 is by forming from the line of the doubling frequency of the line of sacrificial mask.Etching mask 370 then can be for patterned semiconductor layer 308, for for example integrated circuit (IC)-components manufacture.According to embodiments of the invention, etching mask 370 has the mask part 370B substantially consisted of amorphous carbon material.At the etching process for patterned semiconductor layer 308, amorphous carbon material becomes passivation, therefore can in the whole etching of semiconductor layer 308, keep its image and yardstick.Although spacer mask 340 has the desired size of patterned semiconductor layer 308, the material of spacer mask 340 is unsuitable for withstanding the exact image transfer of semiconductor layer, and it may degrade in etching process.According to embodiments of the invention, by image transfer to before semiconductor layer, at first the image of the spacer mask through pruning is transferred to the layer that comprises amorphous carbon material, as described in conjunction with Fig. 3 G and 3H.
Semiconductor layer 308 can be any layer that device manufacture or any semiconductor structure that other need to double frequency mask are manufactured that is suitable for.For example, according to embodiments of the invention, semiconductor layer 308 comprises the material of the array of any semiconductor structure that can suitably be patterned to clear definition.In one embodiment, semiconductor layer 308 consists of the material based on IV family or III-V family material.In addition, semiconductor layer 308 can comprise the form of the array of any semiconductor structure that can suitably be patterned to clear definition.In one embodiment, the form of semiconductor layer 308 is selected from unformed shape, monocrystalline figure and polycrystalline state.In one embodiment, semiconductor layer 308 comprises electric charge-carrier dopant foreign atom.Semiconductor layer 308 can further be present in the substrate top.Substrate can be to consist of any material that is suitable for withstanding manufacturing process.In one embodiment, substrate consists of flexible plastic sheet.Substrate can also be by being suitable for withstanding manufacturing process and semiconductor layer can exist material thereon to form suitably.In one embodiment, substrate consists of the material based on IV family such as crystalline silicon, germanium or silicon/germanium.In another embodiment, substrate consists of III-V family material.Substrate can also comprise insulation course.In one embodiment, insulation course consists of the material that is selected from monox, silicon nitride, silicon oxynitride and high-k dielectric layer.
Should be appreciated that, embodiments of the invention should not be constrained to the manufacture of the spacer mask of being pruned in the location of the end around the sacrificial mask center line.According to another embodiment of the invention, the part around the structure except the line end of spacer mask is pruned under the existence of support structure sacrificial mask.Fig. 4 A-4B shows the top view meaned according to the technique in the spacer mask manufacturing process of the embodiment of the present invention.
With reference to figure 4A, patterned photoresist layer 420 is formed on spacer mask 414 and sacrificial mask 410 tops.The stub area 416 around the nonlinear characteristic in sacrificial mask 410 of spacer mask 414 is exposed by the window 430 in patterned photoresist layer 420.This top view is corresponding to Fig. 3 E ', and can mean the zone that is different from the line end shown in Fig. 3 E ' of spacer mask 314.With reference to figure 4B, spacer mask 414 is pruned, to form the spacer mask 440 through pruning.In addition, patterned photoresist layer 420 and sacrificial mask 410 are removed.In an embodiment according to the present invention, when the non-linear partial of spacer mask 414 is pruned, sacrificial mask 410 is preserved for support structure.The method can form the spacer mask 440 through pruning, and wherein sept end 480 is separated by the distance of the spacing of the line that is greater than the spacer mask 440 through pruning, as shown in Figure 4 B.In one embodiment, the contact terminal to each sept end 480 subsequently forms and can carry out easily, and can not exist by a contact, does not adversely contact the danger more than the sept line of the spacer mask 440 through pruning of.
When forming spacer mask, may it is desirable to, be not only to retain the part conformal with sidewall sacrificial mask spacer layer.In the forming process of spacer mask, can the Retention area reserve area.Such area reserve area can be used to form the line of contact pad, different size or the line extended along both direction (it otherwise can not be formed by sept of the deposition of the periphery along sacrificial core, such as at the T-junction place).Fig. 5 A-5D shows the cut-open view meaned according to the sequence of operations in the spacer mask manufacture method that comprises the area reservation operations of the embodiment of the present invention.
With reference to figure 5A, with sacrificial mask 510 deposited spacers layer 512 conformally.Spacer layer 512 is material sources of the spacer mask for becoming the most at last the doubling frequency scheme for comprising the area reservation operations.Fig. 5 A is corresponding to above-mentioned Fig. 3 C.Before the etching technics with the formation spacer mask for patterning spacer layer 512, photoresist layer 590 is deposited over spacer layer 512 and is patterned.In an embodiment according to the present invention, photoresist layer 590 is patterned, with the part that retains spacer layer 512 (this part otherwise will form in etching operation and be removed at spacer mask).In one embodiment, spacer layer 512 provides support structure for sacrificial mask 510 in the deposition of photoresist layer 590 and patterning process.Photoresist layer 590 can be formed and can be carried out patterning by the described any technology of the photoresist lamination 320 for Fig. 3 E and 3E ' by the described any material of the photoresist lamination 320 for Fig. 3 E and 3E '.
With reference to figure 5B, spacer layer 512 is etched, to form spacer mask 514.Spacer mask 514 comprises area reserve part 592, and described area reserve part 592 is retained because of the protection of photoresist layer 590.Then photoresist layer 590 is removed, and spacer mask 514 pruned in pruning operation, and wherein, in whole pruning technique, sacrificial mask 510 is held.In addition, according to embodiments of the invention, in whole pruning technique, area reserve part 592 also is retained.With reference to figure 5C, sacrificial mask 510 is removed, and only stays the spacer mask 540 through pruning with area reserve part 592.With reference to figure 5D, the image with spacer mask 540 through pruning of area reserve part 592 is transferred to the second mask stack 506, to form etching mask 570.According to embodiments of the invention, because area retains technique, etching mask 570 comprises that at least one its width is greater than the feature of the width of the extra fine wire in etching mask 570, as shown in Figure 5 D.Pruning technique and area retain technique can follow certain order.According to alternative embodiment of the present invention, prune technique and carried out before area retains technique.
Area retains technique and can be combined with spacer mask technique, finally to form the zone that can be used to form contact in semiconductor layer.Fig. 6 A-6B shows the top view meaned according to the operation in the spacer mask manufacture method that comprises area reservation technique of the embodiment of the present invention.
With reference to figure 6A, form the spacer mask 614 with area reserve part 692 around sacrificial mask 610, as described in conjunction with Fig. 5 B.With reference to figure 6B, spacer mask 614 is pruned, and has the spacer mask 640 through pruning of area reserve part 692 with formation, then removes sacrificial mask 610.Area reserve part 692 can provide larger contact can be formed zone thereon.According to embodiments of the invention, in the area reservation operations, retain in spacer layer otherwise will form a removed part in etching operation at spacer mask.
The above discloses the method for the manufacture of semiconductor mask.In an embodiment, provide and there is the semiconductor laminated of sacrificial mask and spacer mask.Sacrificial mask consists of a series of lines, and spacer mask has the sept line with the adjacent sidewalls of this series of line.Sacrificial mask is removed after pruning spacer mask, so that the spacer mask through pruning to be provided.In one embodiment, spacer mask by above semiconductor laminated and with sacrificial mask conformally the deposited spacers layer form.Spacer layer is etched to provide spacer mask and exposes the top surface of sacrificial mask, and wherein said spacer mask has the sept line with the adjacent sidewalls of a series of lines of sacrificial mask.Then, photoresist layer is deposited over above spacer mask and sacrificial mask and is patterned, to expose the part of spacer mask.The expose portion of spacer mask is etched, to prune spacer mask.Finally, sacrificial mask is removed only to provide the spacer mask through pruning.In specific embodiment, the spacer mask through pruning makes the doubling frequency of a series of lines of sacrificial mask.
1. the method for the manufacture of semiconductor mask comprises:
Provide and have the semiconductor laminated of sacrificial mask, wherein said sacrificial mask consists of a series of lines, and each line in described a series of lines has sidewall and end;
Described semiconductor laminated above and with described sacrificial mask deposited spacers layer conformally;
The described spacer layer of etching, described etching is to provide spacer mask and to expose the top surface of described sacrificial mask, wherein said spacer mask has the sept line of the adjacent sidewalls of each line in the described a series of lines with described sacrificial mask, and the part of the end that holds each line in described a series of line of described spacer mask, wherein with described a series of lines of described sacrificial mask in each line adjacent sidewalls described sept line and with the described sept line of adjacent sidewalls of every other line in described a series of lines of described sacrificial mask be discontinuous,
Deposition patterning photoresist layer above described spacer mask and described sacrificial mask, with the expose portion of the end that forms each line in the described a series of lines of holding of described spacer mask;
The described expose portion of the described spacer mask of etching, thus the described part of the end by removing each line in the described a series of lines of holding of described spacer mask is pruned described spacer mask; And
After the described spacer mask of etching, remove described sacrificial mask so that the spacer mask through pruning to be provided.
2. the method for claim 1, wherein, described spacer layer consists of silicon substantially, and the top of described sacrificial mask consists of the material that is selected from silicon nitride and monox substantially, and the described spacer layer of etching utilizes employing to be selected from Cl to provide described spacer mask to comprise 2dry etch process with the gas of HBr.
3. method as claimed in claim 2, wherein, remove described sacrificial mask to provide the described spacer mask through pruning to comprise that utilization is selected from hot H 3pO 4the etching technics of wet etching, aqueous hydrofluoric acid wet etching and SiCoNi etching.
4. the method for claim 1, wherein, described spacer layer consists of monox substantially, and the top of described sacrificial mask consists of the material that is selected from silicon nitride and silicon substantially, and the described spacer layer of etching utilizes employing to be selected from C to provide described spacer mask to comprise 4f 8and CHF 3the dry etch process of gas.
5. method as claimed in claim 4, wherein, remove described sacrificial mask to provide the described spacer mask through pruning to comprise that utilization is selected from hot H 3pO 4wet etching, SiCoNi etching, Cl 2plasma etching and CF 4/ O 2the etching technics of plasma etching.
6. the method for claim 1, wherein, described spacer layer consists of silicon nitride substantially, and the top of described sacrificial mask consists of the material that is selected from monox and silicon substantially, and the described spacer layer of etching utilizes employing to be selected from CH to provide described spacer mask to comprise 2f 2and CHF 3the dry etch process of gas.
7. method as claimed in claim 6, wherein, remove described sacrificial mask to provide the described spacer mask through pruning to comprise that utilization is selected from aqueous hydrofluoric acid wet etching, SiCoNi etching, Cl 2plasma etching and CF 4/ O 2the etching technics of plasma etching.
8. the method for claim 1, wherein the frequency of sept line is the twice of frequency of described a series of lines of described sacrificial mask.
9. method as claimed in claim 8, wherein, the pitch of described a series of lines of described sacrificial mask is roughly 4.
10. the method for claim 1 also comprises:
By the image transfer of the described spacer mask through pruning to mask stack, wherein said mask stack in described semiconductor laminated in and below described sacrificial mask, and described mask stack comprises the agraphitic carbon rete.
CN201310416003.9A 2007-06-01 2008-05-30 Frequency doubling using spacer mask CN103488041A (en)
US93285807P true 2007-06-01 2007-06-01
US60/932,858 2007-06-01
US11/875,250 2007-10-19
US11/875,250 US7807578B2 (en) 2007-06-01 2007-10-19 Frequency doubling using spacer mask
CN 200810098364 Division CN101339361A (en) 2007-06-01 2008-05-30 Frequency doubling using spacer mask
CN103488041A true CN103488041A (en) 2014-01-01
ID=39739785
CN201310416003.9A CN103488041A (en) 2007-06-01 2008-05-30 Frequency doubling using spacer mask
US (2) US7807578B2 (en)
EP (1) EP1998363A3 (en)
JP (1) JP5385551B2 (en)
KR (1) KR100991295B1 (en)
CN (1) CN103488041A (en)
TW (1) TWI471903B (en)
US9953885B2 (en) 2009-10-27 2018-04-24 Taiwan Semiconductor Manufacturing Company, Ltd. STI shape near fin bottom of Si fin in bulk FinFET
FR2960657B1 (en) * 2010-06-01 2013-02-22 Commissariat Energie Atomique Low-dependent lithography method
JP5637212B2 (en) * 2010-08-27 2014-12-10 東京エレクトロン株式会社 Substrate processing method, pattern forming method, semiconductor element manufacturing method, and semiconductor element
US8309462B1 (en) 2011-09-29 2012-11-13 Sandisk Technologies Inc. Double spacer quadruple patterning with self-connected hook-up
WO2013062755A1 (en) * 2011-10-24 2013-05-02 Rolith, Inc. Lithography with reduced feature pitch using rotating mask techniques
JP5881569B2 (en) * 2012-08-29 2016-03-09 株式会社東芝 Pattern formation method
CN103779191B (en) * 2012-10-26 2016-08-31 中芯国际集成电路制造(上海)有限公司 A kind of manufacture method of semiconductor device
US8623770B1 (en) 2013-02-21 2014-01-07 HGST Netherlands B.V. Method for sidewall spacer line doubling using atomic layer deposition of a titanium oxide
US9275873B2 (en) 2013-09-26 2016-03-01 Taiwan Semiconductor Manufacturing Company, Ltd. Masking process and structures formed thereby
US9416447B2 (en) 2014-02-07 2016-08-16 HGST Netherlands B.V. Method for line density multiplication using block copolymers and sequential infiltration synthesis
TWI638385B (en) * 2015-03-31 2018-10-11 聯華電子股份有限公司 Patterned sttructure of a semiconductor device and a manufacturing method thereof
US10504700B2 (en) 2015-08-27 2019-12-10 Applied Materials, Inc. Plasma etching systems and methods with secondary plasma injection
US10504754B2 (en) 2016-05-19 2019-12-10 Applied Materials, Inc. Systems and methods for improved semiconductor etching and component protection
CN107437497B (en) * 2016-05-27 2019-11-01 中芯国际集成电路制造(上海)有限公司 The forming method of semiconductor devices
US10497579B2 (en) 2017-05-31 2019-12-03 Applied Materials, Inc. Water-free etching methods
US10497573B2 (en) 2018-03-13 2019-12-03 Applied Materials, Inc. Selective atomic layer etching of semiconductor materials
US10490406B2 (en) 2018-04-10 2019-11-26 Appled Materials, Inc. Systems and methods for material breakthrough
JPH03257825A (en) * 1990-03-07 1991-11-18 Toshiba Corp Manufacture of semiconductor device
DE10137575A1 (en) * 2001-07-31 2003-02-27 Infineon Technologies Ag Process for producing a mask and process for producing a semiconductor device
DE102004034572B4 (en) * 2004-07-17 2008-02-28 Infineon Technologies Ag Method for producing a structure on the surface of a substrate
KR100674970B1 (en) * 2005-04-21 2007-01-26 삼성전자주식회사 Method for fabricating small pitch patterns by using double spacers
US20090017631A1 (en) * 2007-06-01 2009-01-15 Bencher Christopher D Self-aligned pillar patterning using multiple spacer masks
2007-10-19 US US11/875,250 patent/US7807578B2/en not_active Expired - Fee Related
2008-05-27 JP JP2008137862A patent/JP5385551B2/en not_active Expired - Fee Related
2008-05-28 TW TW97119767A patent/TWI471903B/en not_active IP Right Cessation
2008-05-29 KR KR20080050315A patent/KR100991295B1/en not_active IP Right Cessation
2008-05-29 EP EP08157222A patent/EP1998363A3/en not_active Withdrawn
2008-05-30 CN CN201310416003.9A patent/CN103488041A/en not_active Application Discontinuation
2010-09-20 US US12/886,259 patent/US20110008969A1/en not_active Abandoned
US20080299776A1 (en) 2008-12-04
EP1998363A2 (en) 2008-12-03
KR20080106063A (en) 2008-12-04
TW200905729A (en) 2009-02-01
JP2009004769A (en) 2009-01-08
KR100991295B1 (en) 2010-11-01
US20110008969A1 (en) 2011-01-13
US7807578B2 (en) 2010-10-05
JP5385551B2 (en) 2014-01-08
TWI471903B (en) 2015-02-01
EP1998363A3 (en) 2010-02-10
KR101003897B1 (en) 2010-12-30 Method of forming pitch multipled contacts
US8497060B2 (en) 2013-07-30 Manufacturing method of semiconductor device
US9117766B2 (en) 2015-08-25 Method for positioning spacers in pitch multiplication
US7989355B2 (en) 2011-08-02 Method of pitch halving
US8592940B2 (en) 2013-11-26 Topography based patterning
TWI302635B (en) 2008-11-01 Partially formed integrated circuit and method of integrated circuit fabrication and forming an integrated circuit
JP2009507375A (en) 2009-02-19 Mask pattern having spacers for increasing pitch and method for forming the same
TWI505323B (en) 2015-10-21 Self-aligned pillar patterning using multiple spacer masks
US7576010B2 (en) 2009-08-18 Method of forming pattern using fine pitch hard mask
US7884022B2 (en) 2011-02-08 Multiple deposition for integration of spacers in pitch multiplication process
US7388258B2 (en) 2008-06-17 Sectional field effect devices
JP5532217B2 (en) 2014-06-25 Mask pattern forming method and semiconductor processing method
JP5532303B2 (en) 2014-06-25 Method for reducing critical dimensions of semiconductor devices
US20110294075A1 (en) 2011-12-01 Patterning method
EP2062288B1 (en) 2013-06-19 Efficient pitch multiplication process
JP2011502353A (en) 2011-01-20 Method for integrating NVM circuit with logic circuit
KR20110055912A (en) 2011-05-26 Method for forming fine pattern in semiconductor device
US8030222B2 (en) 2011-10-04 Structures with increased photo-alignment margins
2016-12-14 RJ01 Rejection of invention patent application after publication
2016-12-14 C12 Rejection of a patent application after its publication