Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor

A technology of electron beams and accelerators, applied in the field of electron beam accelerators, can solve the problems of increasing the manufacturing cost of the accelerator 220, and achieve the effects of improving physical strength, reducing costs, and reducing manufacturing costs

Inactive Publication Date: 2007-04-25
AGILENT TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] It will now be seen that the formation of the complex shapes and forms of the glass bodies 292, 294, 296 and 298, the ferrules 252, 254, 256 and 258 and the stainless steel beam directors 312, 314, 316 and 318, and the expensive use of materials that increase the manufacturing cost of the accelerator 220

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  • Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor
  • Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor
  • Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor

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[0025] As used in the specification and claims, the term "ceramic" is meant to include one of the various forms of alumina (particularly Al 2 O3) materials or compositions. The term "layer or coating" includes layers or coatings that are mechanically, chemically, electrically or electrochemically attached to the interior surface of a ceramic body. The term "sleeve" includes within its scope a sleeve or liner that is mechanically, chemically or electrochemically attached to the inner surface of a ceramic body.

[0026] Figure 4A shows a top perspective view of one embodiment of a ceramic body 292 of the present invention. FIG. 4B shows a side view of the ceramic body 292 shown in FIG. 4A. FIG. 4C shows a cross-sectional view of the ceramic body 292 shown in FIG. 4A. FIG. 4D shows a top view of the ceramic body 292 shown in FIG. 4A. FIG. 5 shows a partial cross-sectional view of the ceramic body 292 shown in FIG. 4A.

[0027] Referring now to FIG. 4A , there is shown a top ...

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Abstract

A ceramic electron beam accelerator is disclosed finding particularly efficacious uses in X-ray electronic circuit imaging and testing applications. The ceramic stage design eliminates the need for placing metal reinforcements between adjoining stages of the accelerator, thereby increasing the accelerator's mechanical robustness and reliability, while also reducing manufacturing costs.

Description

technical field [0001] The present invention relates to the field of electron beam accelerators, and more particularly to apparatus, systems and methods for testing solder joints in printed circuit boards by X-ray imaging. Background technique [0002] Automated X-ray inspection (AXI) is an important technology used by electronics manufacturers to "see" through obstructions on densely packed printed circuit boards to detect manufacturing defects such as hidden solder-related issues. One machine used for AXI is Agilent's 5DX automated x-ray testing system, which is capable of detecting more than 97% of all solder-related defects such as opens, shorts, open solder joints, and insufficient or excessive solder, as well as printed circuit More than 90% of all manufacturing defects on board assemblies (PCBAs). Automated X-ray inspection is often used in conjunction with other test solutions such as Automated Optical Inspection (AOI) and in-circuit test (ICT). [0003] X-ray test...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H7/02H05H7/00G01N23/18G01N23/04H01J35/00H05K13/00G01R31/305
CPCH05H7/00
Inventor 戴维·C·雷诺兹
Owner AGILENT TECH INC
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