Semiconductor test board for fine ball pitch ball grid array...

Details Semiconductor test board for fine ball pitch ball grid array... Semiconductor test board for fine ball pitch ball grid array...

2005-05-24

2005-05-24

Cuneo, Kamand (Department: 2829)

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

C324S755090, C324S1540PB, C439S060000

Reexamination Certificate

active

06897385

ABSTRACT:
A semiconductor package test board for conveniently testing a fine ball pitch ball grid array package is provided. The provided semiconductor package test board includes a socket contact unit formed of a plurality of layers, to which a socket having the semiconductor package is connected, wherein the pitch between holes to which pins of the socket are connected increases from the upper surface to the lower surface in the socket contact unit. The holes in the socket contact unit are inclined toward the edges of the socket contact unit, and the angle of inclination of the holes increases from the center of the socket contact unit to the edges of the socket contact unit. Therefore, the holes are formed such that the ball pitch increases from the top layer to the bottom layer. As a result, the socket having the semiconductor package can be directly mounted on the test board without additionally mounting the sub test board (the socket board). In addition, the holes are formed perpendicular to each layer of the socket contact unit, to connect the holes to those on the layers above by using a conductor. As a result, problems such as deterioration of characteristics caused by contact error can be solved.

REFERENCES:
patent: 5888627 (1999-03-01), Nakatani
patent: 5967804 (1999-10-01), Yoshizawa et al.
patent: 6271483 (2001-08-01), Horiuchi et al.
patent: 6459039 (2002-10-01), Bezama et al.
patent: 6580035 (2003-06-01), Chung
patent: 11-284107 (1999-10-01), None

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