Brian D Frederick

US Patent:

6781120, Aug 24, 2004

Filed:

Jun 7, 2002

Appl. No.:

10/165851

Inventors:

Nicholas LeCursi - Jackson MI
Lawrence J. LeGore - Freedom ME
C. Bronson H. Crothers - Orono ME
Peter H. Kleban - Bangor ME
Brian G. Frederick - Orono ME

Assignee:

University of Maine - Orono ME
Stillwater Scientific Instruments - Orono ME

International Classification:

H01R 4300

US Classification:

250286, 250293, 250294, 29825

Abstract:

A technique for providing a grid for a gate such as utilized in gating a stream of ions or other particles in a spectrometer instrument. The grid of wires may, for example, be a so-called Bradbury-Nielson Gate that consists of a set of two electrically isolated sets of equally spaced wires that lie substantially in the same plane and alternate in potential. The method utilized to provide is to first fabricate a frame of an insulating substrate having a hole and depositing metal film patterns such that conductive portions are formed on either side of the hole. Conductive portions on either side form a series of terminating pads on the portion of the substrate closest to the hole and a bus bar. Grid wires are then formed by stretching a section of wire with desired constant tension across the hole and bonding the ends of the wire to a respective one of the pads on one side and bus bar on the other side. The method provides a rapid, inexpensive way to fabricate such modulating devices.

US Patent:

7120998, Oct 17, 2006

Filed:

Aug 20, 2004

Appl. No.:

10/922368

Inventors:

Nicholas LeCursi - Jackson MI, US
Lawrence J. LeGore - Freedom ME, US
C. Bronson H. Crothers - Orono ME, US
Peter H. Kleban - Bangor ME, US
Brian G. Frederick - Orono ME, US

Assignee:

University of Maine - Orono ME
Stillwater Scientific Instruments - Orono ME

International Classification:

H01R 43/00

US Classification:

29825, 296021, 445 35, 445 36, 445 46

Abstract:

A technique for providing a grid for a gate such as utilized in gating a stream of ions or other particles in a spectrometer instrument. The grid of wires may, for example, be a so-called Bradbury-Nielson Gate that consists of a set of two electrically isolated sets of equally spaced wires that lie substantially in the same plane and alternate in potential. The method utilized to provide is to first fabricate a frame of an insulating substrate having a hole and depositing metal film patterns such that conductive portions are formed on either side of the hole. Conductive portions on either side form a series of terminating pads on the portion of the substrate closest to the hole and a bus bar. Grid wires are then formed by stretching a section of wire with desired constant tension across the hole and bonding the ends of the wire to a respective one of the pads on one side and bus bar on the other side. The method provides a rapid, inexpensive way to fabricate such modulating devices.