Patent ID: 8134120
Filing Date: 2012-03-13
Classification: H01J

Abstract:
1. A mass spectrometer comprising: an ionization chamber (b) with a feed channel (a) for a gas to be examined, an electron source (d, n) for ionizing the gas to be examined, first electrodes (c) for accelerating the ionizing electrons, a plurality of second electrodes (g, h, j, m) for mass-dependent separation of ions by acceleration/deceleration thereof, a detector (l) for detecting the separated ions, and a wiring with metallic conductors, wherein the ionization chamber (b), the electron source (d,n), the first electrodes (c), the plurality of second electrodes (g,h,j,m), the detector (l) and the wiring are arranged on a plane nonconductive substrate ( wherein the mass spectrometer is constructed in completely planar fashion, wherein the ionization chamber (b), the plurality of second electrodes (g, h, j, m) for accelerating the electrons and ions, the detector (l) for the ions and the energy filter (k) are produced by a single step of photolithography and etching of a doped semiconductor die ( 6 ) applied to a substrate ( 1 ) and wiring ( 2 ) and wherein the ionization chamber (b), the plurality of second electrodes (g, h, j, m), the detector (l) for the ions and the energy filter (k) are covered by a second flat nonconductive substrate ( 7 ).