US 6,270,356 B1 · IC socket

Abstract

A small and thin IC socket allowing BGA/LGA IC package to be connected to a printed circuit board is disclosed. The IC socket includes a socket body having a plurality of main through-holes formed between the top and bottom surfaces thereof, corresponding to respective ones of the terminals of the IC. In each of the main through-holes, a pair of an upper contact member and a lower contact member which are accommodated and are electrically connected to each other. At least the upper contact member is slidably accommodated and biased to protrude from the top surface of the body. An external connection printed circuit board is fixed to the top surface of the socket body and has a plurality of upper plated through-holes corresponding to respective ones of the main through-holes. The upper contact member protrudes through a corresponding one of the upper through-holes and is electrically connected to a corresponding one of wiring conductors.

Claims11

Dependent claims

An integrated circuit (IC) socket for electrically connecting terminals formed on a bottom surface of a surface-mount IC package to respective ones of predetermined electrodes of a printed circuit board, comprising:

a body member made of an insulating material, the body member having a top surface and a bottom surface thereof, wherein a plurality of-main through-holes are formed between the top surface and the bottom surface so that the main through-holes correspond to respective ones of the terminals of the surface-mount IC package;
a pair of an upper contact member and a lower contact member which are accommodated in each of the main through-holes and are electrically connected to each other so as to electrically connect the terminals of the surface-mount IC package to respective ones of the predetermined electrodes of the printed circuit board, wherein at least the upper contact member is slideably accommodated and biased to protrude from the top surface of the body member;
and
a circuit board member which enables input/output of electrical signals between the IC socket and an external system fixed to the top surface of the body member, the circuit board member having a plurality of upper through-holes corresponding to respective ones of the main through-holes, and further having a plurality of conductors which are electrically connected to the main through holes, wherein the upper contact member protrudes through a corresponding one of the upper through-holes by a predetermined length.

1 more element

An integrated circuit (IC) socket for connecting input/output terminals of one of a BGA (Ball-Grid-Array) IC package and an LGA (Land-Grid-Array) which is accommodated inside the IC socket to respective ones of predetermined IC terminal connection electrodes on a mounting printed circuit board, comprising:

a socket base made of an insulating material to be disposed in an IC terminals connection region that is located at a predetermined position on a surface of the mounting printed circuit board;
socket fixing means for fixing the socket base to the mounting printed circuit board;
an external connection printed circuit board that is fixed to a top surface of the socket base;
and
IC fixing means for fixing a BGA IC package that is placed at a predetermined position on the external connection printed circuit board by pressing the BGA IC package from above,
wherein the socket base comprises:
upper contact pins that are provided at positions corresponding to respective terminal positions of the BGA-type IC placed above the socket base, and that are biased individually inside the socket base and project, by a predetermined length, from the top surface of the socket base and pass through through-holes of the external connection printed circuit board;
and
lower contact pins that are electrically connected to the respective upper contact pins, and that are biased individually inside the socket base and reach a bottom surface of the socket base at positions corresponding to IC terminal connection electrodes provided on the mounting printed circuit board, and
the external connection printed circuit board has the through-holes in which the respective upper contact pins are inserted and surface wiring portions that are insulated from each other, are electrically connected to the respective upper contact pins, and are provided on a surface of the external connection printed circuit board so as to extend to an outer periphery.

7 more elements

Dependencies are inferred from the claim text.

IC socket

Life of this patent

IC socket

Life of this patent

Abstract

Claims11