WO1996037303A1 - Miniaturisierter mehrkammer-thermocycler - Google Patents
Miniaturisierter mehrkammer-thermocycler Download PDFInfo
- Publication number
- WO1996037303A1 WO1996037303A1 PCT/EP1996/002111 EP9602111W WO9637303A1 WO 1996037303 A1 WO1996037303 A1 WO 1996037303A1 EP 9602111 W EP9602111 W EP 9602111W WO 9637303 A1 WO9637303 A1 WO 9637303A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sample
- chamber
- gap
- sample chamber
- thermal cycler
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
- B01L7/52—Heating or cooling apparatus; Heat insulating devices with provision for submitting samples to a predetermined sequence of different temperatures, e.g. for treating nucleic acid samples
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- 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
- 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
- B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
- B01L3/5085—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above for multiple samples, e.g. microtitration plates
- B01L3/50851—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above for multiple samples, e.g. microtitration plates specially adapted for heating or cooling samples
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0809—Geometry, shape and general structure rectangular shaped
- B01L2300/0819—Microarrays; Biochips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
- B01L2300/1805—Conductive heating, heat from thermostatted solids is conducted to receptacles, e.g. heating plates, blocks
- B01L2300/1827—Conductive heating, heat from thermostatted solids is conducted to receptacles, e.g. heating plates, blocks using resistive heater
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
- B01L2300/1883—Means for temperature control using thermal insulation
Definitions
- the invention relates to a miniaturized metokarnmer thermal cycler, in particular in the process of the so-called polymerase chain reaction, in which certain sequences are multiplied from a mixture of DNA sequences, and for carrying out other processes of thermally controlled, biochemical or molecular-biological Processes, application.
- PCR polymerase chain reaction
- PCR is preferably performed in disposable microtubes or in standardized microtiter plates for a variety of samples.
- the sample volumes used are approximately 10 ... 100 ⁇ l (A. Rolfs et all, Clinical Diagnostics and Research, Springer Laboratory, Berlin-Heidelberg (1992).
- CC Oste et al The polymerase chain reaction, Birkhaeuser, Boston-Basel-Berlin (1993), p. 165 also report sample volumes of 1 ... 5 ⁇ l used.
- the so-called microtubes are tempered with conventional heating and cooling units (Markr overview gene technology DI, Nachr. Chem. Tech. Lab. 41 (1993), Ml).
- sample chamber which holds up to 50 ⁇ l of sample liquid, consists of a structured silicon cell with a longitudinal expansion of the order of 10 mm, which is closed off in a sample attack direction by a thin membrane, via which the corresponding temperature is applied by means of miniaturized heating elements.
- This device too the DNA sequence to be multiplied is introduced into the chamber via microchannels, subjected to a polymerase chain reaction and then withdrawn again.
- this sample chamber as a whole also has to be heated and cooled, with which only limited temperature change rates can be achieved.
- the parasitic heat capacity of the sample chamber and possibly a necessary temperature control block are of increasing importance compared to the sample liquid, so that the high temperature change rates that are conceivable in principle in the case of small liquid volumes cannot be achieved, so that the effectiveness of the Procedure remains relatively low.
- the invention is therefore based on the object of specifying a miniaturized multi-chamber thermal cycler which, with simple handling, enables the treatment of a large number of samples with sample volumes in the lower micro and nanoh range at high temperature change speeds and low heating outputs, with relatively homogeneous temperature distributions detecting the individual samples and overheating - or hypothermia effects should be avoided as far as possible.
- the object is achieved by the characterizing part of patent claim 1.
- the object on which the invention is based is achieved in a novel manner by means of a sample receiving body produced in MiloOsystem technology with a large number of sample chambers and a defined coupling to a heat sink via at least one poorly heat-conducting bridge.
- FIG. 1 shows a section of a first embodiment of the invention in a lateral section
- FIG. 2 shows a top view of an opened sample holder carrier in an embodiment corresponding to FIG. 1,
- Fig. 3 is a partial section of a second embodiment of the invention in a lateral section
- Fig. 4 is a plan view of a possible embodiment of a
- FIG. 1 shows schematically a n-matured multi-chamber thermal cycler with a sample-receiving carrier 1 that is as good a heat conductor as possible in a lateral section.
- a silicon wafer is used as the sample holder carrier 1, into which the actual sample chambers 2 are introduced by deep etching in such a way that a sample chamber floor 3 , with sufficient thermal conductivity and low-mass training. The deep etching is continued to the left and right of this sample chamber 2 until only thin webs 5 remain.
- the gap width of these webs is denoted by b sp , which in the context of the invention represents an essential variable that can be variably adapted to the other conditions of the sample holder carrier 1.
- said webs 5 are provided with a poorly heat-conducting bridge 7, for which purpose thin glass, SiC> 2 or Si 3 N4 platelets as well as suitably applied coatings made of such materials, a lacquer or corresponding combinations are suitable.
- a poorly heat-conducting bridge 7 for which purpose thin glass, SiC> 2 or Si 3 N4 platelets as well as suitably applied coatings made of such materials, a lacquer or corresponding combinations are suitable.
- approximately 200 ⁇ m thick pyrex glass plates are used for the bridging.
- the sample holder 1 is realized by a mirror-symmetrical assembly of two identical sub-carriers produced as described above, which is a technologically advantageous embodiment, but does not limit the invention to this.
- Other designs for covering the sample chambers, for example with foils of suitable thermal conductivity, are also possible.
- the sample chamber floors 3 are provided with a heating element 6, 60, which should advantageously be a thin-film heating element applied to the underside of the sample chamber floor, since it can be easily integrated into the manufacturing process. It is also within the scope of the invention to also provide the sample chamber cover with corresponding heating element arrangements, symmetrical to the sample chamber floor.
- the respective sample chamber floor 3 simultaneously acts as a heat compensation layer, so that samples which can be introduced into the sample chamber 2, not shown, experience a homogeneous temperature gradient, both in heating and in cooling cycles.
- the arrangement described is detected in the lateral direction on both sides by a coupling body 4 serving as a heat sink, which is shown only in parts.
- FIG. 2 illustrates an arrangement created according to FIG. 1 with the sample chamber cover removed in a schematic and not to scale; in reality there are at least 96
- Narrow sides 8 are connected to webs 5 on both sides, as shown.
- the respective individual chamber volume can, depending on the desired specifications, be measured, for example, at 2 ... 10 ⁇ l.
- the heat compensation layer acting on the sample chamber floor 3 can be set to 100 ⁇ m, for example.
- Proberi chambers only require extremely low values, which are between 0.5 ... 5 W.
- time constants between 1 ... 6 s and cooling rates between 5 ... 25 K / s with required temperature strokes of approx. 80 K are required realizable by the invention.
- the temperature differences within the sample liquid are below 5 K, so that disruptive overheating or hypothermia of the sample liquid are excluded.
- FIG. 3 a second advantageous embodiment of the invention is shown in a partial side section.
- the production of the sample holder 1 should also correspond to that described in FIG. 1.
- the sample chambers 2 are introduced into the silicon wafer 1 in an array-like manner, which is technologically even more advantageous and, above all, enables a higher number of sample channels per wafer.
- approximately 6,000 sample chambers, each with approximately 0.1 ⁇ l holding volume can be introduced in a 4 "silicon wafer.
- the poorly heat-conducting bridge to be provided according to the invention is realized by a gap 51 between the sample chamber floors 3 and a coupling body 41 serving as a heat sink.
- a gap 51 between the sample chamber floors 3 and a coupling body 41 serving as a heat sink.
- FIG. 5 shows a detail of a possibility of a heating element design according to the invention, as it could be used in a plan view of the sample chamber floor (or lid) according to FIG. 1.
- the structuring of a resistance heating layer which is initially applied over the entire surface is carried out according to the invention in such a way that a wider heating element area and narrower heating webs 60 remain on the respective sample chamber edges over massive areas of the sample chamber receiving element 1 directly below the sample chamber base 3, as a result of which a greater heating power input into the sample slammer in the latter areas ( n) is guaranteed.
- the heating elements 61 used are shown positioned in the sample chambers, analogous explanations apply to the structuring, as described above.
- the heating elements should be designed such that a higher heating power input into the sample chambers 2 takes place on the side of the sample holder 1 facing the coupling body 41.
- the heating elements in this example, as in FIG. 1 will be attached to the bottom or top of the sample chamber floor in the practical embodiment.
- the temperature change rates are adaptable to the respective conditions for a given PCR experiment, between 1 ... 15 K / s.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Hematology (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96916103A EP0772494B1 (de) | 1995-05-24 | 1996-05-17 | Miniaturisierter mehrkammer-thermocycler |
US08/765,649 US5939312A (en) | 1995-05-24 | 1996-05-17 | Miniaturized multi-chamber thermocycler |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519015.7 | 1995-05-24 | ||
DE19519015A DE19519015C1 (de) | 1995-05-24 | 1995-05-24 | Miniaturisierter Mehrkammer-Thermocycler |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996037303A1 true WO1996037303A1 (de) | 1996-11-28 |
Family
ID=7762738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/002111 WO1996037303A1 (de) | 1995-05-24 | 1996-05-17 | Miniaturisierter mehrkammer-thermocycler |
Country Status (4)
Country | Link |
---|---|
US (1) | US5939312A (de) |
EP (1) | EP0772494B1 (de) |
DE (1) | DE19519015C1 (de) |
WO (1) | WO1996037303A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2548647A1 (de) | 2006-10-20 | 2013-01-23 | CLONDIAG GmbH | Testvorrichtungen und-Verfahren zum Nachweis von Analyten |
Families Citing this family (99)
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Also Published As
Publication number | Publication date |
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EP0772494A1 (de) | 1997-05-14 |
US5939312A (en) | 1999-08-17 |
DE19519015C1 (de) | 1996-09-05 |
EP0772494B1 (de) | 2003-04-02 |
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