Ion filter
AssigneeOwlstone Inc.
InventorsMatthew Hart, Andrew Koehl
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Abstract
An ion filter (10) for use in ion mobility spectrometry is described, together with a method for manufacturing the filter. The filter (10) is manufactured by removing portions from a monolithic structure to form a pair of electrodes which remain mechanically connected. The connecting portion (22) provides sufficient electrical impedance between the electrodes to effectively electrically separate the electrodes. The connecting portion may be doped or chemically modified to obtain a desired impedance, or this may be obtained through appropriate selection of physical dimensions.
Claims27
A method of manufacturing an ion filter, the method comprising providing a monolithic structure;
- selectively removing regions of the structure, to form a pair of electrodes defining at least one ion channel therebetween;
- the electrodes further being mechanically connected at one or more locations by a portion of the structure;
- wherein the connecting portion of the structure provides a higher electrical impedance between the two electrodes than the filter would provide without such a mechanical connection, to thereby electrically separate the electrodes.
An ion filter comprising a monolithic structure defining a pair of electrodes defining at least one ion channel therebetween;
- the electrodes further being mechanically connected at one or more locations by a portion of the monolithic structure;
- wherein the connecting portion of the structure provides a higher electrical impedance between the two electrodes than the filter would provide without such a mechanical connection, to thereby electrically separate the electrodes.
Dependencies are inferred from the claim text.