Method to Allow Automatic Probing of File Mounted Logic Cards
Original Publication Date: 1981-Nov-01
Included in the Prior Art Database: 2005-Feb-12
The most commonly used probe for addressing logic cards is the spring-loaded contact, readily available in numerous configurations. This probe addresses square or circular pads incorporated into the card during etching. With specially drilled card stock, it is possible to etch a pad of sufficient size to accept large tolerance variations between the spring-loaded probe and the card itself (which could serve as a locater for the probe). When using standard card stock drilled on .100-inch centers with maximum size pads of .056, it is still possible to accomplish automatic probing with typically sharp-ended probes only if located by the card itself.