Dual Pencil Ambient and Elevated Temperature Test System
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
The conventional technique for carrying out the testing of some semiconductor products which require both ambient temperature and elevated temperature testing is to separately test the entire lot in two stages. Not only does this impose an excessive amount of testing time for the product, but it also exposes the product to excessive opportunities for damage through excessive handling. The dual pencil ambient and elevated temperature test system herein described overcomes these problems by carrying out both the ambient temperature test and the elevated temperature test of each semiconductor chip during a single testing interval. As shown in the figure, the testing head consists of 16 vacuum pencils, numbered 1 through 16 which correspond with 16 stations which are angularly displaced from one another by a 22¼Œ separation.