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https://doi.org/10.1117/1.1386639
| Title: | Coplanarity study on ball grid array packaging | Authors: | Tay, C.J. He, X. Kang, X. Quan, C. Shang, H.M. |
Keywords: | Ball grid array Digital correlation Stereoscopic method |
Issue Date: | Aug-2001 | Citation: | Tay, C.J., He, X., Kang, X., Quan, C., Shang, H.M. (2001-08). Coplanarity study on ball grid array packaging. Optical Engineering 40 (8) : 1608-1612. ScholarBank@NUS Repository. https://doi.org/10.1117/1.1386639 | Abstract: | We describe a stereoscopic measurement method to study the coplanarity of solder balls on a ball grid array (BGA) packaging. The optical system consists of two long-focal-length lenses and a two-channel digital image grabber. The proposed technique uses image recognition and digital correlation, which simplify the calculation procedure. The computation requires only a few seconds to calculate the height of a few hundred balls. The technique is suitable for in situ measurement in BGA manufacturing. © 2001 Society of Photo-Optical Instrumentation Engineers. | Source Title: | Optical Engineering | URI: | http://scholarbank.nus.edu.sg/handle/10635/59803 | ISSN: | 00913286 | DOI: | 10.1117/1.1386639 |
| Appears in Collections: | Staff Publications |
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