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Tolerance of terminal center position x
| Geometric tolerance of IC package outline drawing |
| Tolerance of terminal center position x |
The positional tolerance x is defined as the distances between the actual terminal positions and the corresponding matrix points of which locations are determined by a terminal pitch e and the 2nd and 3rd datum AB derived from all terminal positions through the L east Squares Method. This is acceptable whenever the terminals are included in the circle whose diameter is the sum of maximum terminal diameter and tolerance x ( 0.05 mm).
See "Measuring method for Package Dimensions of BGA EIAJ ED-7304" |
