Calibration standard for lead configurations and method of using

Details Calibration standard for lead configurations and method of using Calibration standard for lead configurations and method of using

1998-01-06

2000-02-22

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

382146, 3562431, G01R 3500, G01J 102

Patent

active

06028319&

ABSTRACT:
The present invention discloses a calibration standard for use in a CCD or laser lead scanner for the measurement of lead configurations in an IC package by selectively making three leads with one on three of the four sides of the package at least 0.03 mm longer than the remaining leads such that a consistent calibration plane, i.e., seating plane, is obtained by the lead scanner such that the scanner can be calibrated for making accurate measurements. The utilization of the present invention calibration standard greatly improves the accuracy of measurements made by a CCD or laser lead scanner such that a repair and rework rate of up to 30% that is normally achieved by a conventional standard can be drastically reduced.

REFERENCES:
patent: 5489843 (1996-02-01), Erjavic et al.
patent: 5563703 (1996-10-01), Lebeau et al.
patent: 5838434 (1998-11-01), Skramsted et al.

Affiliated with

Also associated with

Rating

Calibration standard for lead configurations and method of using does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Calibration standard for lead configurations and method of using, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calibration standard for lead configurations and method of using will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-522495