Terminals of socket connector

Details Terminals of socket connector Terminals of socket connector

2002-09-23

2003-05-13

TA, Tho D. (Department: 2833)

Electrical connectors

Preformed panel circuit arrangement, e.g., pcb, icm, dip,...

With provision to conduct electricity from panel circuit to...

Reexamination Certificate

active

06561819

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a socket connector, and particularly to a socket connector for electrically connecting a central process unit (CPU) to a printed circuit board (PCB).
2. Description of Related Art
Referring to
FIGS. 6-8
, U.S. Pat. No. 6,186,797 discloses a socket connector
9
for electrically connecting a land grid array (LGA) CPU
8
to a PCB
7
. The socket connector
9
includes an insulative housing
91
and a plurality of terminals
92
. The insulative housing
91
defines a plurality of terminal slots
911
for receiving the respective terminals
92
. Each of the terminals
92
includes a retention portion
921
, a pair of spring arms
922
extending from opposite ends of the retention portion
921
and a pair of mating portions
923
located at free ends of the spring arms
922
.
Referring to
FIG. 9
, the LGA CPU
8
and the PCB
7
are arranged at two opposite sides of the socket connector
9
and the spring arms
922
of the terminals
92
are in a free state. Referring to
FIG. 10
, as the LGA CPU
8
and the PCB
7
move closer toward the socket connector
9
, the mating portions
923
of the terminals
92
contact with corresponding first contacting pads
81
of the LGA CPU
8
and corresponding second pads
71
of the PCB
7
. The spring arms
922
deflect resiliently in the terminal slots
911
. The mating portions
923
press against corresponding pads
81
(
71
) due to the resilient force of the spring arms
922
thereby establishing an electrical connection between the LGA CPU
8
and the PCB
7
. However, because the spring arms
922
extend from two opposite sides of the retention portion
921
, the effective length of an individual spring arm
922
is limited as to be unable to provide sufficient resiliency when mating.
Hence, an improved socket connector is required to overcome the disadvantage of the conventional socket connector. U.S. Pat. No. 6,447,304 having the same assignee with the invention, discloses some approach.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a socket connector having terminals with good resiliency.
In order to achieve the object set forth, a socket connector for electrically connecting with a CPU and a PCB includes an insulative housing and a plurality of terminals slantly received in the insulative housing. The insulative housing defines a plurality of slant terminal slots and a plurality of slant position slots communicating with corresponding terminal slots. Each terminal includes a retention portion received in a corresponding position slot, a mating portion extending from a top end of the retention portion and a soldering portion extending from a bottom end of the retention portion for contacting with a corresponding contacting pad of the PCB. The mating portion includes a spring arm and a contacting portion at a top end of the spring arm for contacting with a corresponding soldering pad of the CPU. The contacting portion is much farther from the retention portion than the soldering portion is. Therefore, the length of spring arm is relatively long so that the resiliency of the spring arm is improved.


REFERENCES:
patent: 5324205 (1994-06-01), Ahmad et al.
patent: 6447304 (2002-09-01), Korsunsky et al.

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