Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – With provision to conduct electricity from panel circuit to...
Reexamination Certificate
2000-04-14
2001-09-25
Paumen, Gary F. (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
06293806
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an electrical connector for electrically interconnecting a daughter board and a circuit board, and particularly to an electrical connector having improved terminals for electrically connecting to a circuit board by a variety of methods.
FIG. 6
is essentially a duplication of FIG. 1 of U.S. Pat. No. 5,395,252, wherein an electrical connector
200
comprises an insulative housing
70
and a plurality of S-shaped terminals
80
(only one being shown) received in the housing
70
. A pair of contact ends
86
at opposite ends of each terminal
80
extend beyond the housing
70
for contacting a corresponding contact pad
96
of a daughter board
92
and a corresponding contact pad
96
of a circuit board
94
. After assembling the daughter board
92
and the circuit board
94
to the connector
200
, the two contact ends
86
are respectively compressed by the contact pads
96
thereby electrically connecting each terminal
80
to the daughter board
92
and the circuit board
94
. The free contact ends
86
are arc-shaped so that they are not suitable to be soldered to the printed circuit board
94
by Surface Mounting Technology (SMT). Referring to
FIG. 7
, another type of terminal
60
is shown. The terminal
60
is electrically connected to a circuit board (not shown) by soldering a flat mounting end
64
of the terminal
60
to the circuit board using SMT. One contact end
62
of the terminal
60
forms a bump
622
for contacting a contact pad
66
of a daughter board (not shown). The solder may disintegrate allowing and thus the mounting end
64
of the terminal
60
to disengage from the circuit board when the contact pad
66
of the daughter board is pressed down and pushes against the bump
622
. There is no terminal which can be reliably connected to such a contact pad of a circuit board both by compression contact and by SMT. Hence, an improved electrical connector is required to solve the problems of the prior art.
BRIEF SUMMARY OF THE INVENTION
A first object of the present invention is to provide a connector having an improved terminal for electrically connecting to a circuit board wherein the terminal can contact a pad of the circuit board by direct contact, by using surface mounting technology and by using a solder ball.
A second object of the present invention is to provide a connector having an improved terminal, said terminal being prevented from disengaging from the circuit board during compression.
An electrical connector for electrically interconnecting a daughter board to a circuit board having contact pads comprises an insulative housing and a plurality of terminals received in the housing. The housing has a top face and an opposite bottom face. The housing defines a plurality of receiving areas recessed from the top face and has a number of receiving holes positioned in the receiving areas and extending through the housing from the top face to the bottom face. Each terminal comprises a pair of U-shaped mounting beams, a base portion extending between corresponding ends of the mounting beams, a support portion extending between corresponding opposite ends of the mounting beams and an arcuate contact beam extending from the base portion and having a free end located on the support portion for electrically connecting with a corresponding contact pad of the daughter board. The two mounting beams are received into a corresponding receiving hole of the housing for electrically connecting with a corresponding contact pad of the circuit board. The base portion and the support portion are received in the receiving area.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description of the present embodiment when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 5395252 (1995-03-01), McHugh et al.
patent: 5984693 (1999-11-01), McHugh et al.
patent: 6019611 (2000-02-01), McHugh et al.
Chung Wei Te
Hon Hai - Precision Ind. Co., Ltd.
Paumen Gary F.
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