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US4616895A Expired / Lapsed US ⏱️ 0.0 years remaining

Integrated circuit socket

Assignee: Fujitsu Ltd
•
Filing: 1985-09-09
•
Granted: 1986-10-14
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Expires: 2005-09-09
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Abstract

Abstract An integrated circuit (IC) socket comprising: a box-shaped housing of dielectric material open at the upper side thereof and having a recess for receiving a leadless chip carrier type of IC device; a plurality of contacts for contacting the electrodes of the IC device within the recess, each of the contacts comprising a springy conductive member and being disposed in the bottom of the housing so as to contact the electrodes formed in the bottom surface of the IC device; and two pairs of pressing members arranged at opposite corners for holding the IC device within the recess, each member comprising a springy member and a projection formed at the top end of the springy member for pressing the IC device. The projections on the pressing members are semicircular-shaped to permit easy insertion and removal, and to maintain downward pressure.

Inventors

  • 👤 Tsutomu Yoshizaki
  • 👤 Toshimasa Ishii

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 12:43
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/02; H05K7/10; H05K7/1053; H05K7/1061; H05K7/1069

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 262 words
An IC socket for an IC device such as a quadrilateral-shaped leadless chip carrier having a bottom surface, and a plurality of electrodes formed on the bottom surface, said IC socket comprising: a box-shaped housing of dielectric material opening at an upper side thereof and having a quadrilateral-shaped recess for receiving said IC device and a bottom; a plurality of contacts for contacting with said electrodes of said IC device within said recess, each of said contacts comprising a springy conductive member and being disposed in the bottom of said housing so as to contact with the electrodes formed on the bottom surface of said IC device; and two pairs of pressing members for holding said IC device within said recess, each pressing member being formed as one body integral with said housing and comprising a springy member extending vertically in said recess with an inwardly projecting rounded projection formed at a top end of said springy member for pressing said IC device, said two pairs of pressing members being arranged at the sides of said socket at two diagonally opposed corners of said recess in such a manner that a pressing member of each pair engages with a different side edge of said IC device, at each of two diagonally opposed corners, while the other two diagonally opposed corners of said recess and the sides adjacent thereto are not provided with any pressing members whereby the edges of said IC device thereat are accessible for withdrawal of said IC device from said upper side against force exerted by said pressing members.
Claim 2
Dependent Claim 262 words
An IC socket for an IC device such as a quadrilateral-shaped leadless chip carrier having a bottom surface, and a plurality of electrodes formed on the bottom surface, said IC socket comprising: a box-shaped housing of dielectric material opening at an upper side thereof and having a quadrilateral-shaped recess for receiving said IC device and a bottom; a plurality of contacts for contacting with said electrodes of said IC device within said recess, each of said contacts comprising a springy conductive member and being disposed in the bottom of said housing so as to contact with the electrodes formed on the bottom surface of said IC device; and two pairs of pressing members for holding said IC device within said recess, each pressing member being formed as one body integral with said housing and comprising a springy member extending vertically in said recess with an inwardly projecting rounded projection formed at a top end of said springy member for pressing said IC device, said two pairs of pressing members being arranged at the sides of said socket at two diagonally opposed corners of said recess in such a manner that a pressing member of each pair engages with a different side edge of said IC device, at each of two diagonally opposed corners, while the other two diagonally opposed corners of said recess and the sides adjacent thereto are not provided with any pressing members whereby the edges of said IC device thereat are accessible for withdrawal of said IC device from said upper side against force exerted by said pressing members.
Claim 3
Dependent Claim 25 words
An IC socket as set forth in claim 1, in which said housing has a partition of dielectric material disposed between every two adjacent contacts.
Claim 4
Dependent Claim 21 words
An IC socket as set forth in claim 1, in which said housing has an opening formed at the bottom thereof.
Claim 5
Dependent Claim 32 words
An IC socket as set forth in claim 1, in which the end of each contact constitutes a lead terminal which projects downward out of said housing from the bottom face thereof.
Claim 6
Dependent Claim 46 words
An IC socket as set forth in claim 1, in which the end of each contact constitutes a lead terminal which is folded at the lower face of said housing so as to be disposed on the lower face of said housing and contact said housing.
Claim 7
Dependent Claim 62 words
An IC socket as set forth in claim 1 wherein said rounded projection of said pressing members is semicircular in shape providing rounded corners at both the upper and lower edges thereof whereby insertion and withdrawal of said IC device may be accomplished solely by pressure on said IC device, and said rounded projection presses said inserted IC device against said contacts.

References Cited (Backward Citations)

US3892312A Cited
US3951495A Cited
US4018494A Cited
US4070081A Cited
FR2392575A1 Cited
EP0030763A2 Cited
US4330163A Cited
US4331373A Cited
US4401352A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-10-13 1990-04-14 1990-10-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-10-13 1994-04-14 1994-10-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-10-13 1998-04-14 1998-10-14 $7700.00 Window Closed / Lapsed

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