Surface mount package fault detection apparatus

Details Surface mount package fault detection apparatus Surface mount package fault detection apparatus

2008-02-19

2009-08-18

Nguyen, Ha Tran T (Department: 2829)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S1540PB

Reexamination Certificate

active

07576552

ABSTRACT:
A fault detection apparatus for surface mount packages is provided. The apparatus can include a retainer for releasably securing a circuit board such as a printed circuit board having an electrical component mounted thereon via a ball grid array surface mount package. When mounted within the apparatus, a test signal is applied to the electrical component. The apparatus includes a mechanical actuator, such as a solenoid, for applying a reciprocating force to the circuit board. The reciprocating force can disturb a defect in the ball grid array manifesting as a mechanically unreliable connection at one of the balls where an electrically intermittent connection is occurring. By disturbing the mechanically unreliable connection, the electrically intermittent connection can be caused to fail altogether and thereby reveal the defect as a test signal is carried through the printed circuit board.

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