IC socket

Details IC socket IC socket

1999-12-17

2001-10-09

Metjahic, Safet (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S754090, C439S068000

Reexamination Certificate

active

06300784

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an IC socket for use in an electrical test of an IC, and particularly to an IC socket, which is capable of testing a high frequency characteristic of the IC.
2. Description of the Related Art
Conventionally, various IC sockets have been invented to test a high frequency characteristic of an IC. For example, in an IC socket
50
shown in
FIG. 17
, a contact pin
54
is brought into contact with a terminal
52
a
of an IC
52
mounted on a substrate
51
and a wiring
53
formed on a substrate
51
in such a manner that the contact pin
54
mounts over the terminal
52
a
and the wiring
53
. Then, the terminal
52
a
of IC
52
and the wiring
53
are electrically connected to each other through the contact pin
54
so as to test the frequency characteristic of IC
52
. The contact pin
54
is rotatably attached to a tip of an arc spring member
56
whose one end is fixed to a cover
55
. Then, the contact pin
54
is pressed to the terminal
52
a
of IC
52
and the wiring
53
by the spring force of the spring member
56
, which elastically deforms between the descending cover
55
and the contact pin
54
.
The above-structured IC socket
50
can establish an electric connection between the terminal
52
a
of IC
52
and the wiring
53
through the small contact pin
54
, and shorten the connection distance between the terminal
52
a
of IC
52
and the wiring
53
, allowing inductance components to be reduced (Unexamined Japanese Patent Publication Hei No. 9-74156).
However, the IC socket
50
only presses the contact pin
54
to the terminal
52
a
of IC
52
and the wiring
53
and it is not structured such that the surface of the terminal
52
a
is rubbed by the contact pin
54
. As a result, such a possibility was pointed out that a natural oxide film, which covers the surface of the terminal
52
a
, was not be surely peeled.
As shown in
FIG. 18
, there is proposed an IC socket
58
set forth below (Unexamined Japanese Patent Publication Hei No. 9-74156). Namely, substantially the central portion of an arc-shape contact pin
57
, which is elastically deformable, is fixed to the cover
55
, and both end portions
57
a
and
57
b
of contact pin
57
are pressed to the terminal
52
a
of IC
52
and the wiring
53
, respectively. This allows the natural oxide film, which covers the surface of the terminal
52
a
, to be rubbed and makes it possible to establish an electric connection between the terminal
52
a
of IC
52
and the wiring
53
through the contact pin
57
. However, in such a structure in which contact pin
57
as such is elastically deformed, since rigidity of the contact pin
57
must be retained, the downsizing of IC socket can be sufficiently improved. As a result, such a problem was pointed out that inductance components were not fully reduced.
SUMMARY OF THE INVENTION
It is an object of the present invention is to provide an IC socket, which can rub a surface of an IC terminal with a contact pin and which can reduce inductance components.
The invention of the first aspect is an IC socket, which comprises a contact pin, which has contact portions coming in contact with a terminal of an IC mounted on an IC support portion and a wiring formed on a substrate in such a manner that the contact pin mounts over the terminal and the wiring, and which electrically connects the terminal of IC to the wiring, and a press member for pressing the contact pin to the terminal and the wiring. Then, the contact pin has a first inclined side and a second inclined side crossing each other. Also, the press member has an actuating portion, which comes in contact with the first inclined side, and an elastic member, which comes in contact with the second inclined side. Then, the contact pin is supported by a contact pin support member attached to the press member such that the contact pin can move on the terminal and the wiring by deforming the elastic member by an inclined surface component force, which acts on the first inclined side, when the contact pin is pressed onto the terminal and wiring by the actuating portion.
The invention of the second aspect is that, in the invention of the first aspect, the elastic member is a metal-made elastic member, which is attached to the press member in a one-side beam form, and an insulating member is fixed to an contact portion with the contact pin.
The invention of the third aspect is that, in the invention of the first aspect, the contact pin support member is engaged with an engaging portion, which is formed at a lower side of a contact portion between the terminal of the contact pin and the wiring.
The invention of the fourth aspect is that, in the invention of the first aspect, the contact pin support member is fitted to a hole, which is formed on the contact pin, to generate a space.
The invention of the fifth aspect is an IC socket, which comprises a contact pin, which has contact portions coming in contact with a terminal of an IC mounted on an IC support portion and a wiring formed on a substrate in such a manner that the contact pin mounts over the terminal and the wiring, and which electrically connects the terminal of IC to the wiring, and a press member for pressing the contact pin to the terminal and the wiring. Then, the contact pin has a first inclined side and a second inclined side crossing each other. Also, the press member has an actuating portion, which comes in contact with the first inclined side and an elastic member, which comes in contact with the second inclined side. Then, the contact pin has a step portion, which is supported by the actuating portion of the press member, such that the contact pin can move on the terminal and the wiring by deforming the elastic member by an inclined surface component force, which acts on the first inclined side, when the contact pin is pressed onto the terminal and wiring by the actuating portion.
The invention of the sixth aspect is an IC socket, which comprises a contact pin, which has contact portions coming in contact with a terminal of an IC mounted on an IC support portion and a wiring formed on a substrate in such a manner that the contact pin mounts over the terminal and the wiring, and which electrically connects the terminal of IC to the wiring, and a press member for pressing the contact pin to the terminal and the wiring. Also, the contact pin has a first inclined side and a second inclined side crossing each other, the press member has an actuating portion, which comes in contact with the first inclined side and an elastic member, which comes in contact with the second inclined side. Then, the contact pin is urged to the actuating portion and the elastic member by elastic support means, which is attached to a socket main body, such that the contact pin can move on the terminal and the wiring by deforming the elastic member by an inclined surface component force, which acts on the first inclined side, when the contact pin is pressed onto the terminal and wiring by the actuating portion.
The invention of the seventh aspect is an IC socket, which comprises a contact pin, which has contact portions coming in contact with a terminal of an IC mounted on an IC support portion and a wiring formed on a substrate in such a manner that the contact pin mounts over the terminal and the wiring, and which electrically connects the terminal of IC to the wiring, a press lever for pressing the contact pin to the terminal and the wiring, an operation lever for locking the press lever at a predetermined position where the contact pin comes in contact with the terminal and the wiring, a socket main body for rotatably supporting the press lever and the operation lever, a first spring for always rotating and urging the press lever in a direction where a contact state among the contact pin, the terminal and the wiring is released, and a second spring for always rotating and urging the operation lever in a direction, which is opposite to the urging direction of the first spring. Then, a first cam is

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