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|BGA Coplanarity Measurement by Laser Scanning Inspection Equipment|
|Keywords: BGA coplanarity measurement, relative height, Laser Scanning Inspection|
|In this paper BGA co planarity Measurement by laser scanning inspection method was discussed. Choosing a right datum plane, so that the laser spot´s focusing range could cover all BGA balls?relative height, is a key to success. The measuring speed and accuracy was then evaluated on a sample BGA product with 20?0 array balls by our CT300 laser scanning inspection equipment. The method was proved to be reliable. It not only extended functions of current equipment, but also had a advantage of easy and efficient operation, thus the method could be utilized by co planarity inspection and evaluation for all kinds of BGA.|
|Cui GuoYan, Engineer
Nanjing Electronics Device Institute
Nanjing, JiangSu Province,