JPS6240368Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a socket for an IC package (referred to as an IC socket), in which a thin, flat IC package is mounted on a socket base, and the corner of the IC package is regulated in position. This invention relates to an IC socket that ensures one-to-one correspondence and identical contact between IC terminals on a package and contacts on a socket board.

Generally, in the above-mentioned type of IC socket, the IC
In order to set the mounting position of the package, an IC housing space is defined by molding on the board surface of the socket base, and the corners forming the IC housing space are used to restrict the position of the corners of the IC package, so that the IC socket base and A mechanism is used to ensure the relative position of the IC package cage.

In this case, a protrusion or the like may be provided at the corner of the IC housing space to assist in positioning.

Therefore, in the case of the IC socket that regulates the external shape of the IC package and determines its position, the only difference is the external shape of the IC package, especially the shape and position of the corners of the IC package; for example, the pitch of the IC terminals, etc. are exactly the same. However, it is uneconomical because existing IC sockets cannot be used or multiple dedicated sockets must be prepared.

In addition, in cases such as IC measurement sockets where the IC package cage must be frequently taken in and out of the IC storage space, the corner of the IC package may repeatedly hit the corner of the IC storage space, damaging the corner. causing defects and resulting in IC
This also causes a situation where the positioning effect on the package is lost and the package becomes unusable in a short period of time.

Therefore, the present invention makes it possible to solve the above-mentioned problems, and as detailed below, a corner block that fits the corner shape of the IC package is provided separately from the socket base. By fitting this into a predetermined position on the socket base to define the corner part of the IC housing space, the shape of the corner block can be selected according to the corner shape of the IC package to be applied. In addition, by selecting the material of the corner block, it is possible to form a corner portion that is resistant to damage caused by attaching and detaching the IC package.

The drawings show an embodiment of the above invention,
In the figure, reference numeral 1 indicates a socket base forming an IC socket, and reference numeral 2 indicates a corner block that is fitted into the socket base 1 to define an IC accommodation space. The corner block 2 is made of a material with high surface hardness different from that of the socket base 1, for example ceramic, or the base material is made of the same material as the socket base 1 and subjected to surface treatment such as thermal spraying to increase the surface hardness. Use things, etc.

Also, the shape of the corner of block 2 is adapted to the corner shape of the IC package, as shown in the figure.
It consists of a set of four blocks that fit into the four corners of the IC package.

For example, numeral 3 is a leadless type IC package that is applied to the above-mentioned IC socket, and as shown in FIG. In this case, the shape of the corner of the corresponding pair of corner blocks 2 is set as a right-angled corner 4', and the shape of the corner of the other pair of corner blocks 2 is set as a non-right-angled corner 5'. . FIGS. 1 and 3 show examples of corner blocks 2 having different corner shapes.

As shown in FIG. 2, corner block fitting holes 6 are provided at the four corners of the IC mounting side board surface of the socket base 1 that define the IC accommodation space, and each of the corner blocks 2 is fitted into these holes.

Prepare the socket base with the corner block fitting hole 6 as described above in advance, and attach it to the IC to be applied.
Select a corner block 2 with a corner shape corresponding to the corner shape of the package 3, and attach the socket base 1.
It can be fitted into a predetermined position (fitting hole 6) and used.

As an embodiment, the corner block 2 is removably fitted into the fitting hole 6 provided in the socket base 1,
We present cases where exchange is possible.

As another example, only the original corner shape can be selected, and it is fitted in a non-removable manner (for example, bonded with adhesive).
Including cases where

As described above, the corner block 2 is fitted onto the IC mounting side panel surface of the socket base 1, and an IC accommodation space 7 that restricts each corner of the IC package 3 is defined.

Groups of contacts 9 are disposed on two or four sides of the IC housing space 7, that is, between each corner block 2, in contact with a group of IC terminals 8 (conductive foil). 10 in the diagram
11 is an IC holding cover pivotably attached to one end of the socket base 1 and capable of opening and closing onto the IC storage space 7; 11 is an IC holding cover pivotably attached to the other end of the same cover 10, which engages with an end portion of the cover 10 to keep it closed. It is a lock lever.

According to the present invention, when preparing a plurality of types of corner blocks 2 and the socket base 1 into which the corner blocks are to be fitted, the shape of the corner block 2 is selected and fitted to suit the IC package to be used immediately. An IC socket having an IC accommodation space 7 can be provided.

There is no need to prepare multiple types of IC sockets that differ only in the shape of the corner portions of the IC accommodation space 7, and it is sufficient to prepare only one type of socket base 1 and multiple types of corner blocks 2, which is not only extremely economical, but also extremely economical. , it is possible to make the corner block 2 removable, and by making it removable, you can easily replace the corner block 2 with a different corner shape.
It is possible to form an IC socket that fits the IC package.

In addition, the base of the socket base 2 is made of a material with good moldability and low cost, and only the corner block 2 can be used by selecting an appropriate material.

In other words, if a material with high surface hardness is used for the corner block 2 as explained in the embodiment, even when an IC package such as an IC measurement socket is frequently attached and detached, the corner portion of the IC storage space can be easily removed in a short period of time. This eliminates chipping and abrasion, making it possible to extend the life of the IC socket, and during this period, the positioning function of the IC package can be maintained with high accuracy, making highly reliable contact possible.

The present invention can also be applied to an IC socket of an IC package in which the IC lead protrudes laterally. Also, the corner block 2 may be configured with two or three corner blocks so as to restrict the position of two or three corners on the diagonal of the IC package.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an IC socket showing an embodiment of the present invention, Fig. 2 is a perspective view of the IC socket before the corner block is fitted, and Fig. 3 is a positioning state of the IC package using the corner block. FIG. 1...Socket base, 2...Corner block,
3...IC package cage, 6...corner block fitting hole, 7...IC accommodation space, 8...IC terminal,
9...Contact.

Claims (1)

[Scope of utility model registration request] The IC package is mounted in the IC housing space of the socket base, and the position of the corner of the IC package is controlled by the corner part that defines the IC housing space, so that the contacts on the socket base correspond to the terminals of the IC package. In the IC socket,
A corner block fitting hole is provided in the corner part of the socket base that defines the IC accommodation space, and the other
A corner block for regulating the position of the corner of the IC package is constructed separately from the socket base, the corner block is provided with a corner shape that matches the corner shape of the IC package, and the corner block is fitted into the corner block. At the corner part that fits into the mounting hole and fits the square shape of the IC package above,
An IC socket characterized by having a configuration that defines a corner portion of an IC accommodation space.