WO2012096571A1 - A method of manufacturing a probe comprising a cantilever with a conduit - Google Patents

A method of manufacturing a probe comprising a cantilever with a conduit Download PDF

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Publication number
WO2012096571A1
WO2012096571A1 PCT/NL2012/000007 NL2012000007W WO2012096571A1 WO 2012096571 A1 WO2012096571 A1 WO 2012096571A1 NL 2012000007 W NL2012000007 W NL 2012000007W WO 2012096571 A1 WO2012096571 A1 WO 2012096571A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
cantilever
conduit
core
cover
Prior art date
Application number
PCT/NL2012/000007
Other languages
French (fr)
Inventor
Edin Sarajlic
Original Assignee
Smarttip Bv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Smarttip Bv filed Critical Smarttip Bv
Priority to US13/978,502 priority Critical patent/US9086431B2/en
Priority to ES12709971.1T priority patent/ES2656554T3/en
Priority to EP12709971.1A priority patent/EP2663521B1/en
Priority to PL12709971T priority patent/PL2663521T3/en
Publication of WO2012096571A1 publication Critical patent/WO2012096571A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R3/00—Apparatus or processes specially adapted for the manufacture or maintenance of measuring instruments, e.g. of probe tips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
    • B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
    • B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
    • B81C1/00023—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems without movable or flexible elements
    • B81C1/00119—Arrangement of basic structures like cavities or channels, e.g. suitable for microfluidic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502707—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the manufacture of the container or its components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
    • B81B2201/00—Specific applications of microelectromechanical systems
    • B81B2201/05—Microfluidics
    • B81B2201/057—Micropipets, dropformers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
    • B81B2203/00—Basic microelectromechanical structures
    • B81B2203/01—Suspended structures, i.e. structures allowing a movement
    • B81B2203/0118—Cantilevers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
    • B81B2203/00—Basic microelectromechanical structures
    • B81B2203/03—Static structures
    • B81B2203/0323—Grooves
    • B81B2203/0338—Channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
    • B81C2201/00—Manufacture or treatment of microstructural devices or systems
    • B81C2201/01—Manufacture or treatment of microstructural devices or systems in or on a substrate
    • B81C2201/0101—Shaping material; Structuring the bulk substrate or layers on the substrate; Film patterning
    • B81C2201/0102—Surface micromachining
    • B81C2201/0105—Sacrificial layer
    • B81C2201/0109—Sacrificial layers not provided for in B81C2201/0107 - B81C2201/0108
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making

Definitions

  • a method of manufacturing a probe comprising a cantilever with a conduit
  • the present invention relates to a method of manufacturing a probe, said probe comprising
  • a cantilever extending from said planar substrate, said cantilever having a base end connected to the planar substrate and a distal end, and
  • planar half-product comprising a sandwich of a first layer of a first material, a second layer of a second material, a third layer of a third material on top of i) the second layer and ii) an elongated sacrificial conduit core of a fourth material, the second and third material being different from the first and fourth material, the planar half-product having a first side at the side of the first layer and a second side at the side of the third material, the second side being provided with a cover having a cover hole, the second layer having a patterned cantilever structure, the elongated sacrificial conduit core of the fourth material extending from the first layer at the patterned cantilever structure to the second side at the location of the cover hole.
  • a probe is known with a freely extending cantilever, the probe having a through channel (conduit) extending from a location near the distal end of the cantilever to the planar surface of the probe.
  • a through channel extending from a location near the distal end of the cantilever to the planar surface of the probe.
  • This allows, for example, for passing a liquid from the probe to an object near the distal end of the cantilever.
  • the diameter of the conduit is very small, relatively high pressures are required to pass the liquid through the conduit. However, this may result in destruction of the probe, in particular of the second layer at the location of the cover hole, because right at the location of the cover hole the probe is rather weak.
  • the object of the present invention is to provide a method of manufacturing a probe with improved strength properties.
  • a method according to the preamble is characterized in that the third layer is provided with an etchant window extending from the cover hole towards the cantilever over part of the distance from the cover hole to the base end, said etchant window exposing part of the elongated sacrificial conduit core, and
  • the method comprises the step of removing the elongated
  • the cantilever can be brought to the object to which liquid has to be delivered without being hampered by material of the first layer being present at the base end while the remaining material of the first layer makes destruction of the probe as a result of a high liquid pressure harder. If the first and fourth material can be removed using the same etchant, then the method is very simple and efficient as well .
  • the method comprises the steps of
  • planar half-product can be obtained conveniently, which can subsequently be used to manufacture the probe.
  • the cover is a glass cover.
  • Glass is resistant to a wide range of liquids that might have to be passed through the conduit, and can be chosen to have a desired thermal expansion coefficient. It is also brittle, allowing probes to be broken off from neighbouring probes, in particular if the glass had been provided with a groove for dicing.
  • the etchant is chosen such that it etches both the material of the first layer and the material of the fourth layer.
  • the first material is silicon .
  • Silicon is a material that can be etched very predictably, in particular if the silicon is monocrystalline silicon.
  • the fourth material is silicon.
  • the material of the second layer and the material of the third layer are independently chosen from silicon nitride and silicon oxide.
  • Fig. 1 shows a probe according to the state of the art, in top view (top) and cross-sectional view (bottom) , both views being vertically aligned;
  • Fig. 2 shows a probe as can be manufactured using the method according to the invention, in top view (top) and cross-sectional view (bottom) , both views being vertically aligned;
  • Fig. 3 to 12 illustrate the method steps for manufacturing the probe of fig. 1, in top view (top) and cross-sectional view (bottom), both views being vertically aligned.
  • Fig. 1 shows a prior art probe 10 comprising a base 11 with a cantilever 12 extending from the base 11.
  • the cantilever 12 has a base end 13 and a distal end 14.
  • the probe 10 comprises an elongated conduit 15 extending from a location at the base 11 to the cantilever 12.
  • the elongated conduit 15 has a first opening 16 at said location on the planar substrate and a second opening 17 near the distal end 14 of the cantilever 12.
  • the probe comprises a cover 32 with a cover hole 35. At the location of said cover hole 35 the base 11 is very weak.
  • Fig. 2 shows a probe 100 comprising a planar substrate 101 with a cantilever 102 extending from the planar substrate 101.
  • the cantilever 102 has a base end 103 and a distal end 104.
  • the probe 101 comprises an elongated conduit 105 extending from a location at the planar substrate to the cantilever 102.
  • the elongated conduit 105 has a first opening 106 at said location on the planar substrate where it opens into an area where the probe is relatively weak because of the large lumen where layers are inherently not interconnected) and a second opening 107 near the distal end 104 of the cantilever 102.
  • Fig. 3 to 11 show top views (top) and cross-sectional views (bottom) along the horizontal centerline of the top view) of the manufacturing process.
  • a silicon wafer 201 having a thickness of 380 urn is shown.
  • the silicon wafer 201 is material of the first layer and is of (1,0,0) silicon.
  • the method according to the present invention allows for a multitude of probes 100 to be manufactured at once, but the figures will show one probe 100 in the making only.
  • the silicon wafer 201 is provided with a 350 nm silicon nitride layer as the second layer 202 (Fig. 4).
  • a hole 230 is formed in the second layer 202 (Fig. 5) by Reactive Ion Etching (RIE) , which hole 230 will eventually become the second opening 107.
  • RIE Reactive Ion Etching
  • a polycrystalline silicon layer 204 is deposited (Fig. 6) with a thickness of 1 urn, polycrystalline silicon being the fourth material that fills the hole 230.
  • the polycrystalline fourth layer 204 is etched (Fig. 7) to provide an elongated conduit core 231.
  • a third layer 203 of silicon nitride having a thickness of 350 nm is deposited on top of the second layer 202 and the fourth layer 204 (Fig. 8) and subsequently etched (Fig. 9) to create an etching window 299 so as to expose part of the fourth layer 204 in the direction of the base end 103.
  • the third layer 203 is bonded to a glass cover 232 by anodic bonding (Fig. 10) .
  • the glass cover 232 has a groove 233 over the cantilever structure to facilitate dicing and to improve access of etchant to the cantilever structure.
  • the glass cover also has a cover hole (through hole) 235 that will allow access of etchant to the fourth material at the location of the cover hole 235 and at the location of the etchant window 299 with which it is in direct communication.
  • the elongated shape of the etchant window 299 provides on the one hand excellent access of etchant for quick removal of the fourth material without resulting in a significant weakening of the probe that would adversely affect its capability to withstand high pressures during use of the probe, because of the relatively small width (span) between opposite sides of the third layer 203 defining the etchant window 299.
  • an array of adjacent planar half-products (one of which is shown in Fig. 11) is formed which are subsequently etched.
  • the first layer 201 and fourth layer 204 are etched using KOH/water. Because of the etchant window 299, the elongated conduit 105 is created before all material of the first layer 201 is removed at the location of the cover hole 235 (Fig. 12). It should be noted that the etchant removes substantially all the fourth material to form the conduit 105 from two ends, as soon as first material is removed at the location of the hole 230.
  • the glass cover 232 is diced so as to yield the probes 100.
  • the method may involve steps to provide a cantilever having a tip between the base end and the distal end of the cantilever, generally close to the distal end.
  • the conduit may or may not have an outlet opening in said tip.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The present invention relates to a method of manufacturing a probe comprising a cantilever with a conduit. According to the invention, an etchant window is provided in a layer covering an elongated sacrificial conduit core that is to form the conduit. This allows for an etching process where the elongated sacrificial conduit core is etched away before all material of a substrate is etched away, the remaining material of the substrate material making the probe stronger without being in the way during use of the probe.

Description

A method of manufacturing a probe comprising a cantilever with a conduit
The present invention relates to a method of manufacturing a probe, said probe comprising
- a planar substrate, and
- a cantilever extending from said planar substrate, said cantilever having a base end connected to the planar substrate and a distal end, and
- a conduit extending from i) a first opening at the planar substrate away from the cantilever to ii) a second opening in the cantilever away from the base end;
the method involving etching a planar half-product, said planar half-product comprising a sandwich of a first layer of a first material, a second layer of a second material, a third layer of a third material on top of i) the second layer and ii) an elongated sacrificial conduit core of a fourth material, the second and third material being different from the first and fourth material, the planar half-product having a first side at the side of the first layer and a second side at the side of the third material, the second side being provided with a cover having a cover hole, the second layer having a patterned cantilever structure, the elongated sacrificial conduit core of the fourth material extending from the first layer at the patterned cantilever structure to the second side at the location of the cover hole.
In the art a probe is known with a freely extending cantilever, the probe having a through channel (conduit) extending from a location near the distal end of the cantilever to the planar surface of the probe. This allows, for example, for passing a liquid from the probe to an object near the distal end of the cantilever. Because the diameter of the conduit is very small, relatively high pressures are required to pass the liquid through the conduit. However, this may result in destruction of the probe, in particular of the second layer at the location of the cover hole, because right at the location of the cover hole the probe is rather weak.
The object of the present invention is to provide a method of manufacturing a probe with improved strength properties.
To this end, a method according to the preamble is characterized in that the third layer is provided with an etchant window extending from the cover hole towards the cantilever over part of the distance from the cover hole to the base end, said etchant window exposing part of the elongated sacrificial conduit core, and
the method comprises the step of removing the elongated
sacrificial conduit core and removing first material of the first layer while leaving the second and third layer, by exposing
- the first side,
- the elongated sacrificial conduit core at the second side, and - the edge of the planar half-product towards which the cantilever structure points with an etchant;
removing material from the first layer and the fourth layer by etching, so as to form
- a freely extending cantilever, and
- an open conduit between the cover hole and the distal end;
and ending the step of etching the first layer before an etch front of the first layer reaches the location of the first opening of the planar substrate.
This results in a probe reinforced by remaining material of the first layer at the location of the cover hole, whereas the first layer is relatively thin or (usually) absent at the base end of the
cantilever. Thus the cantilever can be brought to the object to which liquid has to be delivered without being hampered by material of the first layer being present at the base end while the remaining material of the first layer makes destruction of the probe as a result of a high liquid pressure harder. If the first and fourth material can be removed using the same etchant, then the method is very simple and efficient as well .
According to a preferred embodiment, the method comprises the steps of
- providing a first substrate of a first material to act as the first layer with a second layer of a second material, the second material being different from the first material;
- removing material from the second layer of the second material to form a first hole in the second layer of the second material exposing the first substrate of the first material, where the first hole will become the second opening, and providing the second layer with a cantilever structure; - providing a fourth layer of a fourth material on top of the second layer of the second material and the first material of the first layer so as to form an elongated sacrificial conduit core, the fourth material being different from the second material, said elongated sacrificial conduit core having
- a first end at a location where the first opening will be formed by removal of fourth material, and
- a second end filling the first hole;
- providing a third layer of a third material, said third material being different from the first material and the fourth material, on top of the fourth layer such that at the first end of the elongated sacrificial conduit part of the fourth layer is exposed;
so as to provide the half-product comprising a patterned
cantilever structure;
- providing the half-product at the side of the third layer with a cover having a cover hole, such that the cover hole coincides with the first end of the elongated sacrificial conduit core and leaving the first end of the elongated sacrificial conduit part of the fourth layer is exposed,
- removing material from the fourth layer and the first layer by etching, so as to form
- a freely extending cantilever, and
- an open conduit between the cover hole and the distal end.
Thus a planar half-product can be obtained conveniently, which can subsequently be used to manufacture the probe.
According to a preferred embodiment, the cover is a glass cover.
Glass is resistant to a wide range of liquids that might have to be passed through the conduit, and can be chosen to have a desired thermal expansion coefficient. It is also brittle, allowing probes to be broken off from neighbouring probes, in particular if the glass had been provided with a groove for dicing.
According to a favourable embodiment, the etchant is chosen such that it etches both the material of the first layer and the material of the fourth layer.
This makes the method very easy to perform. This objective can be easily achieved if the first and the fourth material are identical, e.g. both silicon.
According to a preferred embodiment, the first material is silicon .
Silicon is a material that can be etched very predictably, in particular if the silicon is monocrystalline silicon.
According to a preferred embodiment, the fourth material is silicon.
This will be etched simultaneously with the first material, if the first material is also silicon.
According to a preferred embodiment, the material of the second layer and the material of the third layer are independently chosen from silicon nitride and silicon oxide.
These are very suitable materials capable of resisting etchant used for removal of first and fourth material where those materials are silicon .
The present invention will now be illustrated with reference to the drawing where
Fig. 1 shows a probe according to the state of the art, in top view (top) and cross-sectional view (bottom) , both views being vertically aligned;
Fig. 2 shows a probe as can be manufactured using the method according to the invention, in top view (top) and cross-sectional view (bottom) , both views being vertically aligned; and
Fig. 3 to 12 illustrate the method steps for manufacturing the probe of fig. 1, in top view (top) and cross-sectional view (bottom), both views being vertically aligned.
Fig. 1 shows a prior art probe 10 comprising a base 11 with a cantilever 12 extending from the base 11. The cantilever 12 has a base end 13 and a distal end 14. The probe 10 comprises an elongated conduit 15 extending from a location at the base 11 to the cantilever 12. The elongated conduit 15 has a first opening 16 at said location on the planar substrate and a second opening 17 near the distal end 14 of the cantilever 12. The probe comprises a cover 32 with a cover hole 35. At the location of said cover hole 35 the base 11 is very weak.
Fig. 2 shows a probe 100 comprising a planar substrate 101 with a cantilever 102 extending from the planar substrate 101. The cantilever 102 has a base end 103 and a distal end 104. The probe 101 comprises an elongated conduit 105 extending from a location at the planar substrate to the cantilever 102. The elongated conduit 105 has a first opening 106 at said location on the planar substrate where it opens into an area where the probe is relatively weak because of the large lumen where layers are inherently not interconnected) and a second opening 107 near the distal end 104 of the cantilever 102.
Fig. 3 to 11 show top views (top) and cross-sectional views (bottom) along the horizontal centerline of the top view) of the manufacturing process.
In Fig. 3 a silicon wafer 201 having a thickness of 380 urn is shown. The silicon wafer 201 is material of the first layer and is of (1,0,0) silicon. The method according to the present invention allows for a multitude of probes 100 to be manufactured at once, but the figures will show one probe 100 in the making only.
The silicon wafer 201 is provided with a 350 nm silicon nitride layer as the second layer 202 (Fig. 4).
A hole 230 is formed in the second layer 202 (Fig. 5) by Reactive Ion Etching (RIE) , which hole 230 will eventually become the second opening 107.
Next a polycrystalline silicon layer 204 is deposited (Fig. 6) with a thickness of 1 urn, polycrystalline silicon being the fourth material that fills the hole 230.
The polycrystalline fourth layer 204 is etched (Fig. 7) to provide an elongated conduit core 231.
A third layer 203 of silicon nitride having a thickness of 350 nm is deposited on top of the second layer 202 and the fourth layer 204 (Fig. 8) and subsequently etched (Fig. 9) to create an etching window 299 so as to expose part of the fourth layer 204 in the direction of the base end 103.
The third layer 203 is bonded to a glass cover 232 by anodic bonding (Fig. 10) . The glass cover 232 has a groove 233 over the cantilever structure to facilitate dicing and to improve access of etchant to the cantilever structure. The glass cover also has a cover hole (through hole) 235 that will allow access of etchant to the fourth material at the location of the cover hole 235 and at the location of the etchant window 299 with which it is in direct communication. The elongated shape of the etchant window 299 provides on the one hand excellent access of etchant for quick removal of the fourth material without resulting in a significant weakening of the probe that would adversely affect its capability to withstand high pressures during use of the probe, because of the relatively small width (span) between opposite sides of the third layer 203 defining the etchant window 299.
Thus an array of adjacent planar half-products (one of which is shown in Fig. 11) is formed which are subsequently etched. The first layer 201 and fourth layer 204 are etched using KOH/water. Because of the etchant window 299, the elongated conduit 105 is created before all material of the first layer 201 is removed at the location of the cover hole 235 (Fig. 12). It should be noted that the etchant removes substantially all the fourth material to form the conduit 105 from two ends, as soon as first material is removed at the location of the hole 230.
After the etching is completed, with first material of the first layer 201 remaining (albeit of reduced thickness) at the location of the cover hole 235 - i.e. before an etch front of the first layer reaches the second layer at the loction of the cover hole 235 - and thus providing improved strength properties, the glass cover 232 is diced so as to yield the probes 100.
It goes without saying that many variations of the method according to the present invention are possible within the scope of the appended claims. For example, the method may involve steps to provide a cantilever having a tip between the base end and the distal end of the cantilever, generally close to the distal end. The conduit may or may not have an outlet opening in said tip.

Claims

C L A I M S
1. A method of manufacturing a probe (100), said probe (100) comprising
- a planar substrate (101) , and
- a cantilever (102) extending from said planar substrate (101) , said cantilever (102) having a base end (103) connected to the planar substrate (101) and a distal end (104), and
- a conduit (105) extending from i) a first opening (106) at the planar substrate (101) away from the cantilever (102) to ii) a second opening (107) in the cantilever (102) away from the base end (103);
the method involving etching a planar half-product, said planar half-product comprising a sandwich of a first layer (201) of a first material, a second layer (202) of a second material, a third layer (203) of a third material on top of i) the second layer (202) and ii) an elongated sacrificial conduit (105) core of a fourth material, the second and third material being different from the first and fourth material, the planar half-product having a first side at the side of the first layer (201) and a second side at the side of the third material, the second side being provided with a cover (232) having a cover hole (235) , the second layer (202) having a patterned cantilever (102) structure, the elongated sacrificial conduit (105) core of the fourth material extending from the first layer (201) at the patterned cantilever (102) structure to the second side at the location of the cover hole (235) , characterized in that the third layer (203) is provided with an etchant window extending from the cover hole (235) towards the cantilever (102) over part of the distance from the cover hole (235) to the base end (103) , said etchant window exposing part of the elongated sacrificial conduit (105) core, and
the method comprises the step of removing the elongated sacrificial conduit (105) core and removing first material of the first layer (201) while leaving the second and third layer (202, 203), by exposing
- the first side,
- the elongated sacrificial conduit (105) core at the second side, and
- the edge of the planar half-product towards which the cantilever (102) structure points with an etchant;
removing material from the first layer (201) and the fourth layer by etching, so as to form
- a freely extending cantilever (102), and - an open conduit (105) between the cover hole (235) and the distal end
(104) ;
and ending the step of etching the first layer (201) before an etch front of the first layer (201) reaches the location of the first opening (106) of the planar substrate (101) .
2. The method according to claim 1, wherein the method comprises the steps of
- providing a first substrate of a first material to act as the first layer (201) with a second layer (202) of a second material, the second material being different from the first material;
- removing material from the second layer (202) of the second material to form a first hole in the second layer (202) of the second material exposing the first substrate of the first material, where the first hole will become the second opening (107) , and providing the second layer (202) with a cantilever (102) structure;
- providing a fourth layer of a fourth material on top of the second layer (202) of the second material and the first material of the first layer (201) so as to form an elongated sacrificial conduit (105) core, the fourth material being different from the second material, said elongated sacrificial conduit (105) core having
- a first end at a location where the first opening (106) will be formed by removal of fourth material, and
- a second end filling the first hole;
- providing a third layer (203) of a third material, said third material being different from the first material and the fourth material, on top of the fourth layer such that at the first end of the elongated sacrificial conduit (105) part of the fourth layer is exposed;
so as to provide the half-product comprising a patterned cantilever (102) structure;
- providing the half-product at the side of the third layer (203) with a cover (232) having a cover hole (235), such that the cover hole (235) coincides with the first end of the elongated sacrificial conduit (105) core and leaving the first end of the elongated sacrificial conduit
(105) part of the fourth layer is exposed,
- removing material from the fourth layer and the first layer (201) by etching, so as to form - a freely extending cantilever (102), and
- an open conduit (105) between the cover hole (235) and the distal (104) .
3. The method according to claim 1 or 2, wherein the cover (232) is glass cover.
4. The method according to any of the preceding claims, wherein the etchant is chosen such that it etches both the material of the first layer and the material of the fourth layer.
5. The method according to any of the preceding claims, wherein the first material is silicon.
6. The method according to any of the preceding claims, wherein the fourth material is silicon.
7. The method according to any of the preceding claims, wherein the material of the second layer (202) and the material of the third layer (203) are independently chosen from silicon nitride and silicon oxide.
PCT/NL2012/000007 2011-01-14 2012-01-13 A method of manufacturing a probe comprising a cantilever with a conduit WO2012096571A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US13/978,502 US9086431B2 (en) 2011-01-14 2012-01-13 Method of manufacturing a probe comprising a cantilever with a conduit
ES12709971.1T ES2656554T3 (en) 2011-01-14 2012-01-13 A method for manufacturing a probe comprising a cantilever with a conduit
EP12709971.1A EP2663521B1 (en) 2011-01-14 2012-01-13 A method of manufacturing a probe comprising a cantilever with a conduit
PL12709971T PL2663521T3 (en) 2011-01-14 2012-01-13 A method of manufacturing a probe comprising a cantilever with a conduit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL1038521 2011-01-14
NL1038521 2011-01-14
NL1038570 2011-02-08
NL1038570 2011-02-08

Publications (1)

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US20130305519A1 (en) 2013-11-21

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