US5739425A
Expired / Lapsed
US
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Cantilever with integrated deflection sensor
Assignee: International Business Machines Corp
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Filing: 1996-08-19
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Granted: 1998-04-14
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Expires: 2016-08-19
Abstract
Abstract A cantilever for scanning probe microscopy and other force or deflection measurements is described. The cantilever includes at least one one integrated strain sensing element within a constriction section (62) . The cantilever is improved over known cantilevers by reducing the longitudinal extension of the constriction, such that its contribution to the total deflection of the cantilever is reduced. The design of the cantilever is further improved by applying a beam (63) with an essentially triangular cross section in either a vertical or a horizontal plane or both.
Inventors
- 👤 Gerd Karl Binnig
- 👤 Heinrich Rohrer
- 👤 Peter Vettiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:51
CPC Classifications
G; G01; G01Q; G01Q20/00; G01Q20/04; B; B82; B82Y; B82Y35/00; G01Q70/00; G01Q70/08; G01Q70/10; Y; Y10; Y10S; Y10S977/00; Y10S977/84; Y10S977/849; Y10S977/86; Y10S977/873
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
157 words
Cantilever having a constriction section of reduced lateral dimensions and/or reduced Young's modulus and at least one integrated strain sensing element forming a layer fully in contact with and/or embedded in said cantilever, wherein the length (L 1 ) of the constriction is less than 1/5 of the total length of the cantilever and the ratio n λ/ε is less than 9, with: n being geometrical factor in the range of 1-10! approximately 2 to 3 depending on the shape of the cantilever; λ being a longitudinal constriction factor defined as the ratio of the length L 1 over the remaining length of the cantilever L 2 ; and ε being a transversal constriction factor defined as a product of the third power of the ratio of the thickness, the ratio of the widths, and the ratio of the Young's moduli of the cantilever in the constriction section and in the remaining part of the cantilever, respectively.
Claim 2
Dependent Claim
157 words
Cantilever having a constriction section of reduced lateral dimensions and/or reduced Young's modulus and at least one integrated strain sensing element forming a layer fully in contact with and/or embedded in said cantilever, wherein the length (L 1 ) of the constriction is less than 1/5 of the total length of the cantilever and the ratio n λ/ε is less than 9, with: n being geometrical factor in the range of 1-10! approximately 2 to 3 depending on the shape of the cantilever; λ being a longitudinal constriction factor defined as the ratio of the length L 1 over the remaining length of the cantilever L 2 ; and ε being a transversal constriction factor defined as a product of the third power of the ratio of the thickness, the ratio of the widths, and the ratio of the Young's moduli of the cantilever in the constriction section and in the remaining part of the cantilever, respectively.
Claim 3
Dependent Claim
16 words
The cantilever of claim 1, including an attached tip for probing the surface of a sample.
Claim 4
Dependent Claim
32 words
The cantilever of claim 1, wherein the constriction section essentially consists of at least one groove extending in lateral direction with respect to the direction that the cantilever extends from its support.
Claim 5
Dependent Claim
20 words
The cantilever of claim 1, including in the immediate vicinity of the constriction section a section with an enhanced stiffness.
Claim 6
Dependent Claim
33 words
The cantilever of claim 1, including in the immediate vicinity of the constriction section a section with an enlarged cross section with respect to the cross section of adjacent sections of the beam.
Claim 7
Dependent Claim
21 words
The cantilever of claim 1, wherein the sensing element essentially extends in a lateral direction with respect to the beam cross-section.
Claim 8
Dependent Claim
24 words
The cantilever of claim 1, wherein the beam has an essentially triangular cross section in at least one of the horizontal and vertical planes.
Claim 9
Dependent Claim
24 words
The cantilever of claim 1 wherein the length L 1 of the constriction is less than 1/10th of the total length of the cantilever.
Claim 10
Dependent Claim
159 words
A scanning probe for an atomic force microscope comprising: a cantilever having a constriction section of reduced cross sectional dimension and reduced Young's modulus and at least one integrated strain sensing element, wherein the length (L 1 ) of the constriction section is less than 1/2 of the total length of the cantilever and the ratio nλ/ε is less than 9, with: n being a geometrical factor which depends on the shape of the cantilever; λ being a longitudinal constriction factor defined as the ratio of the length L 1 over the remaining length of the cantilever L 2 ; ε being a transversal constriction factor defined as a product of the third power of the ratio of the thicknesses, the ratio of the widths, and the ratio of the Young's moduli of the cantilever in the constriction section and in the remaining part of the cantilever, respectively; and an attached tip for probing the surface of a sample.
Claim 11
Dependent Claim
159 words
A scanning probe for an atomic force microscope comprising: a cantilever having a constriction section of reduced cross sectional dimension and reduced Young's modulus and at least one integrated strain sensing element, wherein the length (L 1 ) of the constriction section is less than 1/2 of the total length of the cantilever and the ratio nλ/ε is less than 9, with: n being a geometrical factor which depends on the shape of the cantilever; λ being a longitudinal constriction factor defined as the ratio of the length L 1 over the remaining length of the cantilever L 2 ; ε being a transversal constriction factor defined as a product of the third power of the ratio of the thicknesses, the ratio of the widths, and the ratio of the Young's moduli of the cantilever in the constriction section and in the remaining part of the cantilever, respectively; and an attached tip for probing the surface of a sample.
Claim 12
Dependent Claim
30 words
The cantilever of claim 9 wherein the constriction section comprises at least one groove extending in lateral direction with respect to the direction that the cantilever extends from its support.
Claim 13
Dependent Claim
20 words
The cantilever of claim 10 including in the immediate vicinity of the constriction section a section with an enhanced stiffness.
Claim 14
Dependent Claim
30 words
The cantilever of claim 10 including in the immediate vicinity of the constriction section a section with an enlarged cross section with respect to adjacent sections of the cantilever beam.
Claim 15
Dependent Claim
18 words
The cantilever of claim 10 wherein the shape of the cantilever is triangular and n is approximately 2.
Claim 16
Dependent Claim
22 words
The cantilever of claim 10 wherein the said integrated strain sensing element is positioned along the base of at least one groove.
Claim 17
Dependent Claim
20 words
The cantilever of claim 9 wherein the sensing element extends in a lateral direction with respect to the beam cross-section.
Claim 18
Dependent Claim
24 words
The cantilever of claim 9 wherein the beam has an essentially triangular cross section in at least one of the horizontal and vertical planes.
Claim 19
Dependent Claim
18 words
The cantilever of claim 9 wherein the shape of the cantilever is rectangular and n is approximately 3.
References Cited (Backward Citations)
US4249624A
Cited
US4454770A
Cited
US4464419A
Cited
US4605919A
Cited
US4577709A
Cited
US4670092A
Cited
US5021364A
Cited
US5239870A
Cited
US5321685A
Cited
US5345815A
Cited
US5354985A
Cited
US5444244A
Cited
US5537863A
Cited
US5583286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-13 | 2001-10-13 | 2002-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-13 | 2005-10-13 | 2006-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-13 | 2009-10-13 | 2010-04-14 | $7700.00 | Window Closed / Lapsed |