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Flexboard reflector
| Details |
Inventors: Cornish, Timothy J.; Charles, Harry K.; Wienhold, Paul D.;
Assignee: The John Hopkins University (Baltimore, MD)
Primary Examiner: Berman; Jack
Assistant Examiner: Fernandez; K.
Attorney, Agent or Firm: Graf; Ernest R., Krivak; Carla M.
A novel technique utilizing the precision of printed circuit board design and the physical versatility of thin, flexible substrates is disclosed to produce a new type of ion reflector. A precisely defined series of thin conductive strips (traces) are etched onto a flat, flexible circuit board substrate. Preferably, the thin conductive strips are further apart at one end of the substrate and get increasingly closer towards the other end of the substrate. The flexible substrate is then rolled into a tube to form the reflector body, with the conductive strips forming the rings of the ion reflector. The spacing between the traces, and hence the ring spacing, can be readily varied by adjusting the conductor pattern on the substrate sheet during the etching process. By adjusting the spacing between the rings, the characteristics of the field created by the reflectron can be easily customized to the needs of the user. |
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DETAILED DESCRIPTION To this end, a novel technique utilizing the precision of printed circuit board design and the physical versatility of thin, flexible substrates has been devised to produce a new type of ion reflector.
In this method, a precisely defined series of thin conductive strips (traces) are etched onto a flat, flexible circuit board substrate.
The flexible substrate is then rolled into a tube to form the reflector body, with the conductive strips forming the rings of the ion reflector.
The spacing between the traces, and hence the ring spacing, can be readily varied by adjusting the conductor pattern on the substrate sheet during the etching process.
The present invention is a multi-layered reflectron for a time-of-flight (TOF) mass spectrometer, comprising: plural structural layers; and at least one flexible electrode layer, the flexible electrode layer creating an electric field in the reflectron when a voltage is applied thereto to slow down, stop, and reverse the direction of travel of ions traveling through said reflectron.
The flexible electrode layer comprises a flexible substrate having a plurality of conducting traces formed thereon, the flexible substrate being rolled into a tubular shape so that said conducting traces form rings surrounding a central axis through the length of the reflectron.
The distance between the conducting traces, and therefore the rings, can, if desired, gradually decrease from one end of the reflectron to the other.
The distance between the conducting traces can also be equally spaced, or user defined (any spacing desired).
The method of manufacturing a reflectron according to one representation of the present invention can comprise the steps of: photo-etching a plurality of conducting traces onto a flexible substrate sheet; wrapping the photo-etched substrate sheet around a mandrel so that the plural conducting traces coincide to form a plurality of rings surrounding the mandrel, leaving a connector end of the flexible substrate sheet unwrapped; wrapping one or more plies or layers of uncured, pre-impregnated composite material around the substrate, so that all of the exposed portion of the substrate, except for the unwrapped connector end, is covered by the composite material ply(s); curing the photo-etched substrate and composite material on the mandrel; and removing the cured photo-etched substrate and composite material from the mandrel to form a rigid tubular reflectron
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Metal Working 
