Method of fabricating wire member

• US 20060200986A1
• Filed: 04/19/2006
• Published: 09/14/2006
• Est. Priority Date: 11/05/2001
• Status: Active Grant

• Current Assignee: Jeol Resonance Inc. (JEOL Limited)
• Original Assignee: JEOL Limited
• Inventors: Tanaka, Ryoji, Kida, Jun
• Granted Patent: US 7,426,779 B2
• Time in Patent Office: Days
• US Class Current: 29/868
• CPC Class Codes: G01R 33/34007 Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
• CPC Class Codes: G01R 33/46 NMR spectroscopy
• CPC Class Codes: Y10T 29/49004 including measuring or testing of device or component part
• CPC Class Codes: Y10T 29/49075 including permanent magnet or core
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing
• CPC Class Codes: Y10T 29/49169 Assembling electrical component directly to terminal or elongated conductor
• CPC Class Codes: Y10T 29/49194 Assembling elongated conductors, e.g., splicing, etc.

Abstract

A wire member adapted to be used in a detection coil of an NMR spectrometer'"'"'s probe. The wire member has a sleeve made of a copper tube having a high electrical conductivity, strands made of platinum, and a thin film of gold or rhodium formed on the surface of the sleeve by plating. The strands are mounted inside the sleeve and have a cross section to cancel the magnetic susceptibility due to the sleeve. The thin film cancels the total magnetic susceptibility of the sleeve and strands.

Claims

1. A method of fabricating a wire member for use in a detection coil that detects an NMR signal from a sample, said method comprising the steps of:

preparing at least one first wire component made of a first metal having a high electrical conductivity and at least one second wire component made of a second metal having a magnetic susceptibility opposite in sign to magnetic susceptibility of said first wire component;

placing said first and second wire components close and parallel to each other; and

forming a thin film of a third metal on at least one surface of said first and second wire components, said third metal having a magnetic susceptibility opposite in sign to a total magnetic susceptibility of said first and second wire components.

2. A method of fabricating a wire member as set forth in claim 1, wherein said first wire component has a tubular shape and holds said second wire component therein, and wherein said thin film is formed on a surface of said first wire component by plating or evaporation.

3. A method of fabricating a wire member as set forth in claim 1, wherein said first metal is copper, said second metal is platinum, and said third metal is one of platinum and rhodium.

4. A method of fabricating a wire member as set forth in claim 1, wherein said first metal has a diamagnetic susceptibility, said second metal has a paramagnetic susceptibility, and said third metal has one of a diamagnetic susceptibility and a paramagnetic susceptibility.

5. A method of fabricating a wire member as set forth in claim 1, wherein said first and second components are formed by separate process steps, cut to desired lengths, and then assembled.