Location

La Jolla, CA

Start Date

1-1-1989 12:00 AM

Description

Structures such as PC boards may be characterized as having quantized density variations (metal traces versus board material) which occur in known planes within the board. Digital stereo radiography involves taking two digital radiographs (a digitized version of a conventional radiograph) with the sample at two different angles relative to the direction of propagation of the X-rays. Assuming that edges of density variations can be identified on the digital radiographs we can locate the plane in which the density variation lies by determining the change in location of the edge between the two radiographs. This technique offers improved throughput for X-ray inspection of PC boards over laminography since only two views are required.

Volume

8B

Chapter

Chapter 6: Electronic Materials and Devices

Section

Electronic Materials and Devices

Pages

1227-1232

DOI

10.1007/978-1-4613-0817-1_153

Language

en

File Format

application/pdf

Share

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Jan 1st, 12:00 AM

Digital Stereo Radiography, Applications to Imaging of Printed Circuit Boards

La Jolla, CA

Structures such as PC boards may be characterized as having quantized density variations (metal traces versus board material) which occur in known planes within the board. Digital stereo radiography involves taking two digital radiographs (a digitized version of a conventional radiograph) with the sample at two different angles relative to the direction of propagation of the X-rays. Assuming that edges of density variations can be identified on the digital radiographs we can locate the plane in which the density variation lies by determining the change in location of the edge between the two radiographs. This technique offers improved throughput for X-ray inspection of PC boards over laminography since only two views are required.