Beginning of this page
Jump to main content

Please note that JavaScript and style sheet are used in this website,
Due to unadaptability of the style sheet with the browser used in your computer, pages may not look as original.
Even in such a case, however, the contents can be used safely.


Terminal coplanarity y


Geometric tolerance of IC package outline drawing

Terminal coplanarity y

  Symbols for geometric toleranceyS1st datum

Example: y=0.08
Figure:Example

This example shows that by using the seating plane (1st datum surface S) as a standard, fluctuation in the vertical direction of the bottom point of each terminal is 0.08mm or less.
See "Measuring method for Package Dimensions of BGA EIAJ ED-7304"