WO2004095898A2 - An electronic assembly having angled spring portions - Google Patents

An electronic assembly having angled spring portions Download PDF

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Publication number
WO2004095898A2
WO2004095898A2 PCT/US2004/006879 US2004006879W WO2004095898A2 WO 2004095898 A2 WO2004095898 A2 WO 2004095898A2 US 2004006879 W US2004006879 W US 2004006879W WO 2004095898 A2 WO2004095898 A2 WO 2004095898A2
Authority
WO
WIPO (PCT)
Prior art keywords
terminals
array
electronic assembly
socket
extending
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2004/006879
Other languages
French (fr)
Other versions
WO2004095898A3 (en
Inventor
Brian Deford
Donald Tran
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel Corp filed Critical Intel Corp
Priority to EP04718075A priority Critical patent/EP1611644B1/en
Priority to HK06100391.9A priority patent/HK1077931B/en
Priority to AT04718075T priority patent/ATE450908T1/en
Priority to DE602004024379T priority patent/DE602004024379D1/en
Publication of WO2004095898A2 publication Critical patent/WO2004095898A2/en
Publication of WO2004095898A3 publication Critical patent/WO2004095898A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2435—Contacts for co-operating by abutting resilient; resiliently-mounted with opposite contact points, e.g. C beam
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/52—Fixed connections for rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0256—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections for soldering or welding connectors to a printed circuit board

Definitions

  • This invention relates to an electronic assembly of the kind that may have
  • Integrated circuits are usually manufactured in and on wafers that are
  • a die may then be mounted to a
  • package substrate for purposes of providing rigidity to the entire package and for
  • a socket may be mounted to a circuit board, which may be shaped and
  • the socket typically have matching substrate and socket contact terminals through
  • the socket may have a plurality of socket springs.
  • the substrate contact
  • terminals may come into contact with free ends of the socket springs and then
  • Such cantilever portions are usually aligned with rows or columns of an
  • portions of the springs thus limit the number of electric signals that can be routed
  • Figure 1 is a top plan view of portions of an electronic assembly including
  • socket solder balls socket springs, and substrate contact terminals
  • Figure 2 is a side view in a direction 2 in Figure 1 further illustrating
  • Figure 3 is a top plan view on 3-3 in Figure 2 illustrating a layout of the
  • Figure 4 is a top plan view of an outline of the entire electronic assembly
  • Figure 5 is a side view of the electronic assembly illustrated in Figure 4. DETAILED DESCRIPTION OF THE INVENTION
  • each socket spring 18 has a respective
  • Each socket solder ball 16 secured thereto.
  • Each socket solder ball 16 is attached to a
  • Each socket spring 18 has a respective spacer portion 26 extending in a z-
  • a free end 30 of a respective cantilever portion 28 can be moved in a z-
  • the substrate contact terminals 22 are located on a lower surface of the substrate contact terminals 22 .
  • Each substrate contact terminal 22 is brought into contact
  • Center points of the socket solder balls 16 are in an array having rows
  • socket solder balls 16 are located are spaced from one another by a
  • y-direction is due to design constraints for routing traces on a printed circuit
  • Center points of the substrate contact terminals 22 are also in an array of
  • terminals 22 are located are spaced from one another by a distance of 1.17 mm.
  • terminals 22 is thus exactly the same as the spacing between the rows and
  • center points of the socket solder balls 16 are, however, offset relative to the array
  • the cantilever portions 28 are oriented at an angle of 30.44°, measured
  • 29.33° is due to manufacturing constraints.
  • the actual angle is preferably not
  • a line 32 can be drawn from a center point of the socket solder ball 16A to
  • a line 34 can be drawn from
  • the line 32 crosses through the line 34 and would cross through its center point if
  • the cantilever portions 28 can be made relatively long while still
  • the center point of the socket solder ball 16A is spaced from a
  • the socket body 12 has a generally square
  • socket solder balls 16 form an array
  • FIGS 4 and 5 illustrate the electronic assembly in more detail.
  • microelectronic die typically a semiconductor microelectronic die 38, is mounted
  • the package substrate 20 is then positioned on the package substrate 20.
  • socket body 12 is positioned over the package substrate 20 to retain the package
  • An integrated circuit in the microelectronic die 38 is connected to contacts
  • socket body 12 is electrically connected to a second electronic device in the form

Landscapes

  • Connecting Device With Holders (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Testing Of Individual Semiconductor Devices (AREA)
  • Measuring Leads Or Probes (AREA)
  • Multi-Conductor Connections (AREA)
  • Springs (AREA)

Abstract

An electronic assembly is provided, having a plurality of spring elements interconnecting corresponding terminals of first and second arrays of terminals on first and second electronic devices. The arrays have rows and columns extending in x- and y-directions, respectively. Each spring element has a cantilever portion extending diagonally in the x- and y-directions between corresponding terminals of the first and second arrays.

Description

AN ELECTRONIC ASSEMBLY HAVING ANGLED SPRING PORTIONS
BACKGROUND OF THE INVENTION
1). Field of the Invention
[0001] This invention relates to an electronic assembly of the kind that may have
a socket with spring contacts for making contact with terminals on a
semiconductor package substrate.
2). Discussion of Related Art
[0002] Integrated circuits are usually manufactured in and on wafers that are
subsequently singulated into individual dies. A die may then be mounted to a
package substrate for purposes of providing rigidity to the entire package and for
purposes of routing of signals to a side of the package of the substrate opposing
the die.
[0003] A socket may be mounted to a circuit board, which may be shaped and
dimensioned to receive the semiconductor package. The package substrate and
the socket typically have matching substrate and socket contact terminals through
which signals can be provided between the package substrate and the socket.
[0004] The socket may have a plurality of socket springs. The substrate contact
terminals may come into contact with free ends of the socket springs and then
bend cantilever portions of the springs by movement of the substrate contact
terminals toward a body of the socket. Forces created by the springs ensure good contact between the free ends of the springs and the socket contact terminals.
[0005] Such cantilever portions are usually aligned with rows or columns of an
array of contact terminals to which they are attached. By aligning the cantilever
portions in such a manner, the number of contact terminals in a particular row or
column is limited by the lengths of the cantilever portions. The cantilever
portions of the springs thus limit the number of electric signals that can be routed
over a given surface area.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] The invention is described by way of example with reference to the
accompanying drawings, wherein:
[0007] Figure 1 is a top plan view of portions of an electronic assembly including
socket solder balls, socket springs, and substrate contact terminals;
[0008] Figure 2 is a side view in a direction 2 in Figure 1 further illustrating
additional components of the electronic assembly;
[0009] Figure 3 is a top plan view on 3-3 in Figure 2 illustrating a layout of the
socket solder balls on a socket body of the electronic assembly;
[0010] Figure 4 is a top plan view of an outline of the entire electronic assembly;
and
[0011] Figure 5 is a side view of the electronic assembly illustrated in Figure 4. DETAILED DESCRIPTION OF THE INVENTION
[0012] Figures 1 and 2 of the accompanying drawings illustrate components of
an electronic assembly 10, according to an embodiment of the invention, including
a printed circuit board 11, a socket body 12, printed circuit board contact
terminals 14, socket solder balls 16, socket springs 18, a package substrate 20, and
substrate contact terminals 22.
[0013] Referring specifically to Figure 2, the socket springs 18 are all held within
the socket body 12. A base portion 24 of each socket spring 18 has a respective
socket solder ball 16 secured thereto. Each socket solder ball 16 is attached to a
respective one of the printed circuit board contact terminals 14.
[0014] Each socket spring 18 has a respective spacer portion 26 extending in a z-
direction from the base portion 24 thereof, and a respective cantilever portion 28
extending diagonally at an angle relative to the z-direction from an upper end of
the respective spacer portion 26 thereof. The spacer portions 26 are held within
openings in the socket body 12, and the cantilever portions 28 are above the socket
body 12. A free end 30 of a respective cantilever portion 28 can be moved in a z-
direction against a bending spring force of the cantilever portion 28.
[0015] The substrate contact terminals 22 are located on a lower surface of the
package substrate 20. Each substrate contact terminal 22 is brought into contact
with a respective free end 30 of a respective socket spring 18. The package
substrate 20 is subsequently moved closer to the socket body 12. Movement of the
package substrate 20 toward the socket body 12 bends the cantilever portions 28, which creates a spring force between a respective free end 30 and a respective
substrate contact terminal 22. The spring force ensures good contact between the
respective free end 30 and the respective substrate contact terminal 22.
[0016] As illustrated in Figure 1, center points of the socket solder balls 16,
cantilever portions 28, and center points of the substrate contact terminals 22 are
dimensioned, spaced, and oriented in a manner that allows for a denser routing of
signals over a given surface while still allowing sufficient flexibility of the
cantilever portions 28.
[0017] Center points of the socket solder balls 16 are in an array having rows
extending in an x-direction and columns extending in a y-direction. The columns
in which the socket solder balls 16 are located are spaced from one another by a
distance of 1.09 mm. The rows in which the socket solder balls 16 are located are
spaced from one another by a larger distance of 1.17 mm. The larger pitch in the
y-direction is due to design constraints for routing traces on a printed circuit
board 11 to which the socket body 12 is mounted.
[0018] Center points of the substrate contact terminals 22 are also in an array of
rows extending in an x-direction and columns extending in a y-direction. The
columns in which the substrate contact terminals 22 are located are spaced from
one another by a distance of 1.09 mm. The rows in which the substrate contact
terminals 22 are located are spaced from one another by a distance of 1.17 mm.
The spacing of the rows and columns of center points of the substrate contact
terminals 22 is thus exactly the same as the spacing between the rows and
columns of center points of the socket solder balls 16. The array formed by center points of the substrate contact terminals 22 is, however, offset relative to the array
formed by center points of the socket solder balls 16 by a distance of 0.57 mm in
the x-direction and 0.97 mm in the y-direction.
[0019] The cantilever portions 28 are oriented at an angle of 30.44°, measured
clockwise relative to the y-direction. The ideal angle can be represented by the
formula:
A = TAN1 (pitch in x-direction/ (pitch in y-direction x 2)) = TAN1 (1.09/(0.97 x 2)) = 29.33°
[0020] The difference between the actual angle of 30.44° and the ideal angle of
29.33° is due to manufacturing constraints. The actual angle is preferably not
more than 5° more or less from the ideal angle.
[0021] A line 32 can be drawn from a center point of the socket solder ball 16A to
a center point of the substrate contact terminal 22A. A line 34 can be drawn from
a center point of a socket solder ball 16B, in the same column but in an adjacent
row to the socket solder ball 16A, to a center point of a socket solder ball 16C in
the same row but in a column adjacent the socket solder ball 16B. An extension of
the line 32 crosses through the line 34 and would cross through its center point if
the angle were 29.33°.
[0022] By orienting all the cantilever portions 28 at the stated angle relative to
the y-direction, the cantilever portions 28 can be made relatively long while still
positioning a relatively large number of the solder balls 16 over a given area. In
the given example, the center point of the socket solder ball 16A is spaced from a
center point of the substrate contact terminal 22 A by a distance of 1.125 mm, although the rows are spaced from one another by only 1.17 mm, and the columns
are spaced from one another by only 1.09 mm.
[0023] As illustrated in Figure 3, the socket body 12 has a generally square
outline. As further illustrated in Figure 3, the socket solder balls 16 form an array
near four edges of the socket body 12, while a central region of the socket body 12
is free of socket solder balls 16. The 1.09 mm spacing between columns and 1.17
mm spacing between rows is maintained over the entire array of socket solder
balls 16.
[0024] Figures 4 and 5 illustrate the electronic assembly in more detail. A
microelectronic die, typically a semiconductor microelectronic die 38, is mounted
on the package substrate 20. The package substrate 20 is then positioned on the
free ends of the socket springs 18 and moved toward the socket body 12 to bend
the cantilever portions 28 of the socket springs 18. A clamp 40.secured to the
socket body 12 is positioned over the package substrate 20 to retain the package
substrate 20 and the socket body 12 in position in a z-direction relative to one
another, so as to maintain the bend shape of the socket springs 18.
[0025] An integrated circuit in the microelectronic die 38 is connected to contacts
on the package substrate 20, and through vias in the package substrate 20 to the
substrate contact terminals 22. Electric interconnections provided by the printed
circuit board contact terminals 14, socket solder balls 16, socket springs 18,
substrate contact terminals 22, and vias in the package substrate 20 allow for
signals to be transmitted between traces on the board 11 and the integrated circuit
in the microelectronic die 28. [0026] In the exemplary embodiment, a first electronic device in the form of the
socket body 12 is electrically connected to a second electronic device in the form
of the package substrate 20. Another embodiment may make use of the principles
of the invention to connect other electronic devices to one another.
[0027] While certain exemplary embodiments have been described and shown in
the accompanying drawings, it is to be understood that such embodiments are
merely illustrative and not restrictive of the current invention, and that this
invention is not restricted to the specific constructions and arrangements shown
and described since modifications may occur to those ordinarily skilled in the art.

Claims

CLAIMSWhat is claimed:
1. An electronic assembly, comprising:
first and second electronic devices;
first and second arrays of terminals in rows, extending in an x-direction, and
columns, extending in a y-direction, on facing sides of the first and second
electronic devices respectively, terminals of the second array being offset in the x-
and y-directions relative to terminals of the first array; and
a plurality of spring elements interconnecting corresponding terminals of the
first and second arrays, each having a cantilever portion extending diagonally in
the x- and y-directions between corresponding terminals of the first and second
arrays.
2. The electronic assembly of claim 1, wherein the terminals have a larger pitch
in the y-direction than in the x-direction.
3. The electronic assembly of claim 2, wherein each portion extends from a first
terminal of the first array in a direction between second and third terminals of the
first array, the first and second terminals being in the same column and adjacent
rows, and the second and third terminals being in the same row and adjacent
columns.
4. The electronic assembly of claim 3, wherein the portion extends at an angle
which is less than 5° from an angle A relative to the y-direction, wherein:
A = TAN1 (pitch in x-direction/ (pitch in y-direction x 2)).
5. The electronic assembly of claim 1, further comprising:
a circuit board, the first electronic device being a socket body on the circuit
board.
6. The electronic assembly of claim 5, wherein the spring contacts are secured
to the terminals of the first array and bent by movement of the second electronic
device toward the first electronic device.
7. The electronic assembly of claim 5, wherein the second electronic device is a
semiconductor package comprising a package substrate, having the second array
of terminals thereon, and a microelectronic die mounted to the package substrate.
8. The electronic assembly of claim 1, wherein each spring element has a spacer
portion extending from a respective terminal of the first array away from the first
electronic device, the cantilever portion of the respective spring element contact
extending from the respective spacer portion.
9. The electronic assembly of claim 8, wherein the cantilever portion is bent by
the second electronic device.
10. An electronic assembly, comprising:
a circuit board;
a socket body on the circuit board;
a first array of terminals on the socket body;
a package substrate;
a second array of terminals on a side of the package substrate facing the
socket body, the terminals of the first and second arrays being located in rows,
extending in an x-direction, and columns, extending in a y-direction, terminals of
the second array being offset in the x- and y-directions relative to terminals of the
first array;
a plurality of spring elements secured to the first array of terminals and
interconnecting corresponding terminals of the first and second arrays, each
having a cantilever portion extending diagonally in the x- and y-directions
between corresponding terminals of the first and second arrays; and
a microelectronic die mounted to the package substrate.
11. The electronic assembly of claim 10, wherein the terminals have a larger
pitch in the y-direction than in the x-direction.
12. The electronic assembly of claim 11, wherein each cantilever portion extends
from a first terminal of the first array in a direction between second and third
terminals of the first array, the first and second terminals being in the same column and adjacent rows and the second and third terminals being in the same
row and adjacent columns.
13. The electronic assembly of claim 12, wherein the cantilever portion extends
at an angle which is less than 5° from an angle A relative to the y-direction,
wherein:
A = TAN1 (pitch in x-direction/ (pitch in y-direction x 2)).
14. A socket, comprising:
a socket body;
an array of terminals on the socket body, in rows extending in an x-direction
and columns extending in a y-direction; and
a plurality of spring elements secured to respective ones of the terminals,
each spring element having a cantilever portion extending diagonally in the x-
and y-directions from the respective terminal to which the respective spring
element is secured.
15. The socket of claim 14, wherein the terminals have a larger pitch in the y-
direction than in the x-direction.
16. The socket of claim 15, wherein each portion extends from a terminal of the
array in a direction between second and third terminals of the array, the second
terminals being in the same column and adjacent rows and the second and third terminals being in the same row and adjacent columns.
17. The socket of claim 16, wherein the portion extends at an angle which is less
than 5° from an angle A relative to the y-direction, wherein:
A = TAN1 (pitch in x-direction/ (pitch in y-direction x 2)).
PCT/US2004/006879 2003-04-09 2004-03-05 An electronic assembly having angled spring portions Ceased WO2004095898A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04718075A EP1611644B1 (en) 2003-04-09 2004-03-05 An electronic assembly having angled spring portions
HK06100391.9A HK1077931B (en) 2003-04-09 2004-03-05 An electronic assembly having angled spring portions
AT04718075T ATE450908T1 (en) 2003-04-09 2004-03-05 ELECTRONIC ASSEMBLY WITH ANGLED SPRING PARTS
DE602004024379T DE602004024379D1 (en) 2003-04-09 2004-03-05 ELECTRONIC ASSEMBLY WITH ANGLED SPRING

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/410,733 US7121838B2 (en) 2003-04-09 2003-04-09 Electronic assembly having angled spring portions
US10/410,733 2003-04-09

Publications (2)

Publication Number Publication Date
WO2004095898A2 true WO2004095898A2 (en) 2004-11-04
WO2004095898A3 WO2004095898A3 (en) 2005-05-26

Family

ID=33130832

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/006879 Ceased WO2004095898A2 (en) 2003-04-09 2004-03-05 An electronic assembly having angled spring portions

Country Status (7)

Country Link
US (1) US7121838B2 (en)
EP (1) EP1611644B1 (en)
CN (1) CN100533865C (en)
AT (1) ATE450908T1 (en)
DE (1) DE602004024379D1 (en)
TW (1) TWI242311B (en)
WO (1) WO2004095898A2 (en)

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US20050112959A1 (en) * 2003-11-20 2005-05-26 Kuang-Chih Lai Large elastic momentum conduction member of IC device socket
TWM373059U (en) * 2009-05-18 2010-01-21 Hon Hai Prec Ind Co Ltd Electrical connector
CN202009091U (en) * 2010-12-07 2011-10-12 富士康(昆山)电脑接插件有限公司 Electric connector
US9076698B2 (en) * 2012-10-23 2015-07-07 Intel Corporation Flexible package-to-socket interposer
US8961193B2 (en) 2012-12-12 2015-02-24 Intel Corporation Chip socket including a circular contact pattern
JP7523748B2 (en) * 2020-09-23 2024-07-29 株式会社リコー Substrate unit, detachable unit, and image forming apparatus

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Also Published As

Publication number Publication date
TWI242311B (en) 2005-10-21
ATE450908T1 (en) 2009-12-15
US7121838B2 (en) 2006-10-17
CN100533865C (en) 2009-08-26
TW200507354A (en) 2005-02-16
US20040203261A1 (en) 2004-10-14
EP1611644A2 (en) 2006-01-04
WO2004095898A3 (en) 2005-05-26
EP1611644B1 (en) 2009-12-02
CN1802777A (en) 2006-07-12
HK1077931A1 (en) 2006-02-24
DE602004024379D1 (en) 2010-01-14

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