Flow cell consisting of layer and connection means
The invention relates to a flow cell comprising a layered arrangement of three plates ( 3 - 5 ) in which an intermediate plate ( 4 ) consisting of a flexible material is inserted between plates ( 3, 5 ) consisting of a more solid material, and at least one of the plates comprises at least one recess ( 15, 17 ) for receiving fluid, that is bordered by another plate ( 3, 5 ) of the layered arrangement. Such recesses are especially microchannels and reaction chambers. According to the invention, the plates are interconnected by means arranged parallel to the plate plane at a distance to the recess, compressing the intermediate plate.
1. Flow cell with a layered arrangement of three plates ( 3 - 5 ), in which an intermediate plate ( 4 ) made of a flexible material is held between plates ( 3 , 5 ) made of a more rigid material, the intermediate plate ( 4 ) having at least one recess ( 16 , 17 ) forming a chamber ( 17 ) and/or a connecting hole ( 16 ; 78 , 79 ; 85 , 87 ; 96 ; 102 , 103 ) for holding fluid, wherein the plates ( 3 - 5 ) are connected with one another by connecting means ( 12 , 13 , 18 ) arranged some distance from the recess ( 15 , 17 ) in the direction parallel to the plane of the plates in such a way that the intermediate plate ( 4 ) is compressed, wherein at least one of the plates ( 3 , 5 ) of rigid material has at least one recess ( 10 ) open toward the intermediate plate ( 4 ) that forms a holding seat for a separately prefabricated microcomponent, wherein the recess ( 10 ) having a shoulder forming a through opening in the plate ( 3 ) or the recess ( 10 ) only being open on one side toward the intermediate plate ( 4 ), wherein the microcomponent ( 6 ) is held in the recess ( 10 ) by positive engagement and is bordered on a side facing away from the recess ( 10 ) by the recess ( 16 , 17 ; 78 , 79 ; 85 , 87 ; 96 ; 102 , 103 ).
2. Flow cell in accordance with claim 1 , wherein the layered arrangement contains positioning elements ( 12 , 13 , 18 ) for mutual alignment of the plates, and that these positioning elements are arranged along the sides of the layered structure some distance from the recess.
3. Flow cell in accordance with claim 2 , wherein the positioning elements and the connecting means ( 12 , 13 , 18 ) have common components.
4. Flow cell in accordance with claim 2 , wherein the positioning elements and/or the connecting means consist of holes ( 13 , 18 ) and pins ( 12 ).
5. Flow cell in accordance with claim 4 , wherein the pins ( 12 ) are formed as integral parts of one ( 3 ) of the plates ( 3 - 5 ).
6. Flow cell in accordance with claim 4 , wherein the diameter of the pins is smaller than the diameter of the holes.
7. Flow cell in accordance with claim 1 , wherein the connecting means and/or positioning elements are arranged on opposite edges of the plates ( 3 - 5 ).
8. Flow cell in accordance with claim 1 , wherein at least one of the plates made of a more rigid material has holes with a counterbore ( 40 ) for receiving the heads ( 29 b ) of the connecting pins ( 12 b ), which heads ( 29 b ) secure the plate from behind.
9. Flow cell in accordance with claim 1 , wherein at least one of the plates ( 3 - 5 ) of the more rigid material, has the at least one recess ( 10 ) for holding a preferably separately prefabricated microcomponent ( 6 , 58 , 71 , 89 ).
10. Flow cell in accordance with claim 9 , wherein the recess is open both towards the intermediate plate ( 4 ) and towards the outside of the flow cell and preferably is undercut as seen from the outside.
11. Flow cell in accordance with claim 9 , wherein the lateral dimensions of the microcomponent ( 6 ) positioned in the recess ( 10 ) are greater than the lateral dimensions of a recess ( 17 ) that is formed in the intermediate plate ( 4 ) and is bounded by the microcomponent ( 6 ).
12. Flow cell in accordance with claim 1 , wherein the intermediate plate is compressed mainly in a region ( 140 , 141 ) adjacent to the recess and/or connecting means ( FIGS. 4 e and 6 e ).
13. Flow cell in accordance with claim 1 , wherein one of the plates has a recess ( 32 e , 111 , 112 ) with a base region ( 38 , 116 , 119 ) that is thinner than the plate, can be deformed, and/or can be pierced with a hollow needle ( FIG. 5 f and FIGS. 10 a to 10 c ).
14. Flow cell in accordance with claim 1 , wherein a connector ( 7 - 9 ) is formed as a single piece on at least one the plates ( 3 , 5 ) made of the more rigid material.
15. Flow cell in accordance with claim 1 , wherein a flow cell connector has a conical outer and/or inner surface ( 142 , 143 ).
16. Flow cell in accordance with claim 1 , wherein electrical conductors ( 126 , 130 - 135 ) are integrated in the flow cell ( FIG. 11 ).
17. Flow cell in accordance with claim 16 , wherein a conductor ( 126 , 131 , 133 ) is formed as a coating on one of the plates.
18. Flow cell in accordance with claim 1 , wherein a recess ( 27 ) formed on the outside of the flow cell for holding fluid is covered by a film ( 26 ) ( FIG. 4 d ).
19. Flow cell in accordance with claim 1 , wherein a single layered arrangement of plates ( 3 - 5 ) has several flow cell functional units ( 2 ).
20. Flow cell in accordance with claim 1 , wherein a film ( 84 , 109 ) for forming a valve or for covering a recess that is open towards the outside is formed between two plates of the layered arrangement ( FIG. 8 e and FIG. 9 d ).