Browse Prior Art Database

Solder Ball Connector Module

IP.com Disclosure Number: IPCOM000110512D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 2 page(s) / 104K

Publishing Venue

IBM

Related People

Friedl, E: AUTHOR

Abstract

This article describes special test modules which are used in standard test adapters to test solder ball connectors (SBCs) having a test point grid which is smaller than the minimum test point grid of the tester.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Solder Ball Connector Module

       This article describes special test modules which are
used in standard test adapters to test solder ball connectors (SBCs)
having a test point grid which is smaller than the minimum test point
grid of the tester.

      There are two groups of test points in a module (Fig. 1).
Those in the tester grid are perpendicularly connected to the test
pads by rigid pins 1.  The remaining test points outside the tester
grid have substantially narrower spacings and are tested by spring
contact pins 2.  The spring contact pins are inserted in sleeves 6 to
which flexible wires 3 are soldered.  The other end of these wires 3
is linked to contact pins 4 which are pressed into a retainer block
5.  Similar to the module, the retainer block is inserted in the
adapter (Fig. 2).  The dimensions of the milled recess for the module
and the retainer block must be such that all contact pins, i.e., both
the rigid pins in the module and the contact pins in the retainer
block, are in the tester grid.

      The module is introduced into the accurately fitting recess
from the bottom side of the adapter.  For this purpose, the bottom
plate of the adapter is screwed off.  The cables from the module to
the retainer plate are uniformly distributed, and the retainer block
is fixed in the predetermined milled recess and adjusted by means of
two centering pins.  After assembly of module and retainer block, the
lower plate of the adapter is screwed back...