X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1999-02-10
2000-11-21
Bruce, David V.
X-ray or gamma ray systems or devices
Specific application
Absorption
378 21, 378 51, 439 74, 3562371, G01B 1506
Patent
active
061513806
ABSTRACT:
This invention relates to a system for the removal and reattachment of a ball grid array (BGA) package component to a printed circuit board, that is adapted for the real time X-ray inspection of BGA package removal and reattachment. The system comprises heating means comprising upper and lower heating platens juxtaposed to each other for the reception, support and application of heat to the workpiece comprising the BGA package and the printed circuit board, wherein the heating means is prepared from materials that are transmissive to X-ray radiation. Suitable x-ray transmissive materials are selected from high melting point polymers, aluminum, glasses and ceramics, and include materials having an atomic number less than 14. The system includes X-ray inspection means comprising means for generating an X-ray beam for producing an X-ray image of the workpiece, fluoroscopic imaging means for generating a visible X-ray image of the workpiece; and video camera means for viewing the X-ray image and generating a video output of the X-ray image. The system extends to the automated detection and inspection of the workpiece by conventional computer and video systems.
REFERENCES:
patent: Re35423 (1997-01-01), Adams et al.
patent: 4890313 (1989-12-01), Lam et al.
patent: 4944447 (1990-07-01), Thome
patent: 4974249 (1990-11-01), Zweig
patent: 4995068 (1991-02-01), Chou et al.
patent: 5012502 (1991-04-01), Battin et al.
patent: 5113425 (1992-05-01), Zweig
patent: 5127032 (1992-06-01), Lam et al.
patent: 5184768 (1993-02-01), Hall et al.
patent: 5372294 (1994-12-01), Gore et al.
patent: 5524132 (1996-06-01), Ranadive
patent: 5590170 (1996-12-01), Zweig
patent: 5654994 (1997-08-01), Marto
patent: 5978440 (1999-11-01), Kang et al.
patent: 6009145 (1999-12-01), Zweig et al.
Gore, 1997, SMT, 62-4.
Lau, Ball Grid Array Technology, Chapter one.
Moore, 1996, Circuits Assembly, Dec.:44-6.
Thermofoil Heaters, Minco Products, Inc. catalog, p. 3.
Polysulfone Rod, Sheet, Slab & Film, AirPlastics catalog, p. 139.
Zweig David
Zweig Gilbert
Bruce David V.
Glenbrook Technologies Inc.
Hobden Pamela R
LandOfFree
Ball grid array re-work assembly with X-ray inspection system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ball grid array re-work assembly with X-ray inspection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ball grid array re-work assembly with X-ray inspection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1265066