Ion traps and ion trap arrays have been constructed using alternative fabrication technology. Theses technologies enable mass analyzers to be built with new types of control and exhibit close performance with their traditional counter parts: (1) Monolithic construction. (2) Mass resolution of 1-2 Th at FWHM. (3) Tandem MS capability. (4) Intact protein analysis. SLA has allowed fabrication of complex ion trap designs at a miniaturized scale strengthening arguments in support of alternative technologies: (1) Individual control of ion trap analyzers in the array. (2) Sensitivity improves via multichannel operation; LDR 0.1 to 10 (mu)g/ml. (3) RF voltage is inside the range of operational amplifiers.
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