CA1081813A - Electrical connector for connecting ic packages to a p.c.b. - Google Patents
Electrical connector for connecting ic packages to a p.c.b.Info
- Publication number
- CA1081813A CA1081813A CA269,811A CA269811A CA1081813A CA 1081813 A CA1081813 A CA 1081813A CA 269811 A CA269811 A CA 269811A CA 1081813 A CA1081813 A CA 1081813A
- Authority
- CA
- Canada
- Prior art keywords
- electrical connector
- housing
- corner posts
- substrate
- pair
- 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.)
- Expired
Links
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
An electrical connector, for use in mounting two planar substrates on a printed circuit board or the like, comprising a hollow housing of electrically insulating material and shaped to receive and support the substrates therein in individual, spaced parallel planes, the housing carrying a plurality of electrical terminals each having a post portion projecting from the housing for reception in a hole in a printed circuit board or the like, and two independently flexible contact fingers extending in the opposite direction to the post portion, and each providing a contact surface located so as to engage an edge of one of the substrates.
Description
81~3~3 This invention relates to an electrical connector for use in mounting substrates on a printed circuit board or the like.
Electronic integrated circuit packages are available in a number of forms, one such being a planar substrate of, for example, ceramic material, carrying components and circuitry in integrated form and connected to contact pads on the edges of the substrate.
Often it is necessary to mount a plurality of such substrates on a printed circuit board, with the contact pads of the substrate electrically connected to conductive tracks on the printed circuit board, and in order to save space it is often necessary to mount two substrates one above the other in parallel planes above the printed circuit board.
According to this invention there is provided an electrical connector, for use in mounting two planar sub-strates on a printed circuit board or the like, comprising a hollow housing of electrically insulating material having walls defining means to receive and support the substrates therein in superposed, spaced parallel planes, and to permit airflow through the housing, the housing carrying a plurality of electrical terminals each having a post portion projecting from the housing for reception in a hole in a printed circuit board or the like, and two independently flexible contact fingers extending in the opposite direction to the post portion, and each providing a contact surface located in an individual one of said planes such as to engage a contact on an edge of a substrate when located in that plane.
Connectors according to this invention can be economical to manufacture, simple to use, and reliable in use. Further
Electronic integrated circuit packages are available in a number of forms, one such being a planar substrate of, for example, ceramic material, carrying components and circuitry in integrated form and connected to contact pads on the edges of the substrate.
Often it is necessary to mount a plurality of such substrates on a printed circuit board, with the contact pads of the substrate electrically connected to conductive tracks on the printed circuit board, and in order to save space it is often necessary to mount two substrates one above the other in parallel planes above the printed circuit board.
According to this invention there is provided an electrical connector, for use in mounting two planar sub-strates on a printed circuit board or the like, comprising a hollow housing of electrically insulating material having walls defining means to receive and support the substrates therein in superposed, spaced parallel planes, and to permit airflow through the housing, the housing carrying a plurality of electrical terminals each having a post portion projecting from the housing for reception in a hole in a printed circuit board or the like, and two independently flexible contact fingers extending in the opposite direction to the post portion, and each providing a contact surface located in an individual one of said planes such as to engage a contact on an edge of a substrate when located in that plane.
Connectors according to this invention can be economical to manufacture, simple to use, and reliable in use. Further
-2-:'' ~ 3 since the two substrates are held in spaced parallel planes - there can be good a-r circulation around the substrates permitting adequate cooling thereof. Since the two contact fingers of each terminal are independently flexible each can at all times provide the necessary contact force with a contact pad of an associated substrate mounted in the connector, that is even when there is only one substrate ` mounted in the connector.
An electrical connector according to this invention will now be described by way of example with reference to the drawings in which:-Figure l is a perspective view of the connector together with two substrates for mounting therein;
Figure 2 is a sectional view on the line II - II
in Figure l;
Figure 3 is a sectional view on the line III - III
in Figure l; and Figure 4 is a sectional view on the line I~ - IV in Figure l.
As shown, the connector comprises a hollow housing 1 of electrically insulating material, and ghaped to receive and support two planar substrates 2 therein, each substrate 2 having a plurality of contact pads 3 spaced around its edges.
The housing 1 is a substantially square in horizontal cross-section, and has four corner posts 4 and 5, joined by slotted side walls 6, each wall 6 having therein six slots 7 extending parallel to the corner posts 4 and 5. The walls 6 are of only about half the height of the corner posts 4 and 5, except betweenthe first and second slots 7 from each . `
1(~81813 :
end of each wall 6, to allow for air flow through the housing 1.
The housing 1 has a bottom wall 8 (Figures 2, 3 and 4) with upstanding projections 9 which in use of the conn-ector serve to support a substrate 2 as shown in Figures2 and 3, the projections 9 being aligned with the full-height portions of the walls 6.
The corner posts 4 are recessed at their free ends, the recesses 10 being shaped to receive and support a corner of a substrate 2 as shown in Figure 2. Also as clearly shown in Figure 2 the corner posts 4 are cut away at their middle portions llsuch that the posts 4 are resilient and the upper surface of a substrate 2 resting on the projections 9 is engaged by a downwardly facing surface 12 on the corner posts 4.
The corner posts 5 have chamfered free ends, provid-ing inwardly sloping surfaces 12 clearly seen in Figure 3, and are also cut away at their middle portions 13 such that the corner posts 5 are resilient. As substrates 2 are intro-duced into the housing 1 they engage the sloping surfaces 12of the corner posts 5 such that the posts 5 are resiliently bent outwardly to permit entry of the substrates 2, the posts 5 then returning to their original posi~ions with a downwardly facing surface 14 (Figure 3) engaging the upper surface of the upper substrate 2.
The housing 1 is thus able to receive and support two substrates 2 in individual spaced parallel planes.
Each of the slots 7 in the walls 6 of the housing 1 contains an electrical terminal 15, best seen in Figure 4.
Each terrninal 15 has a post portion 16 which projects through : .
.. : ~
108181;3 an individual aperture 17 in the bottom wall 8 of the housing 1 for reception in a hole in a printed circuit board (not shown). As shown in Figure 4 terminals 15 of two sizes can be used such that the posts 16 lie in two staggered rows. Each terminal 15 also has two independ-ently flexible contact fingers 18 and 19 extending in the opposite direction to the post portion 16 and each providing a contact surface 20 or 21 located in an individual one of the planes of the substrates 2 when in the housing 1 such as to engage an individual one of the contact pads 3 on one of the substrates 2. The contact finger 19 is relatively long and is thus sufficiently resilient while being straight, whereas the contact finger 18 is relatively short and is therefore reversely bent at 22 to impart sufficient resilience thereto.
Thus, with two substrates 2 mounted in the housing 1 as shown in Figures 2 to 4, the contact pads 3 on all four edges of each substrate 2 will be engaged by individual contact surfaces 20 or 21 of a terminal 15 and the substrates 2 can be electrically connected to conductors on a printed circuit board by plugging the post portions 16 of the terminals 15 into holes in the printed circuit board.
Each terminal 15 is retained in its slot 7 by a pimple 23 at the inner end of the post portion 16 engaging in a recess in the bottom wall 8 of the housing 1.
Each of the corner posts 4 and 5 of the housing 1 has a hole 24 in its free end, which hole 24 receive a peg 25 at a corner of a cover 26 which is applied to the housing 1 after the substrates 2 have been mounted therein in order to protect the substrates and also give rigidity to the .~
1~818~3 connector assembly. -~
A partlcularly advantageous feature of the connector described above is that the terminals 15 can be stamped and formed from sheet metal and are thus cheap and easy to manu~acture while still giving high contact forces in use.
: ' , .
An electrical connector according to this invention will now be described by way of example with reference to the drawings in which:-Figure l is a perspective view of the connector together with two substrates for mounting therein;
Figure 2 is a sectional view on the line II - II
in Figure l;
Figure 3 is a sectional view on the line III - III
in Figure l; and Figure 4 is a sectional view on the line I~ - IV in Figure l.
As shown, the connector comprises a hollow housing 1 of electrically insulating material, and ghaped to receive and support two planar substrates 2 therein, each substrate 2 having a plurality of contact pads 3 spaced around its edges.
The housing 1 is a substantially square in horizontal cross-section, and has four corner posts 4 and 5, joined by slotted side walls 6, each wall 6 having therein six slots 7 extending parallel to the corner posts 4 and 5. The walls 6 are of only about half the height of the corner posts 4 and 5, except betweenthe first and second slots 7 from each . `
1(~81813 :
end of each wall 6, to allow for air flow through the housing 1.
The housing 1 has a bottom wall 8 (Figures 2, 3 and 4) with upstanding projections 9 which in use of the conn-ector serve to support a substrate 2 as shown in Figures2 and 3, the projections 9 being aligned with the full-height portions of the walls 6.
The corner posts 4 are recessed at their free ends, the recesses 10 being shaped to receive and support a corner of a substrate 2 as shown in Figure 2. Also as clearly shown in Figure 2 the corner posts 4 are cut away at their middle portions llsuch that the posts 4 are resilient and the upper surface of a substrate 2 resting on the projections 9 is engaged by a downwardly facing surface 12 on the corner posts 4.
The corner posts 5 have chamfered free ends, provid-ing inwardly sloping surfaces 12 clearly seen in Figure 3, and are also cut away at their middle portions 13 such that the corner posts 5 are resilient. As substrates 2 are intro-duced into the housing 1 they engage the sloping surfaces 12of the corner posts 5 such that the posts 5 are resiliently bent outwardly to permit entry of the substrates 2, the posts 5 then returning to their original posi~ions with a downwardly facing surface 14 (Figure 3) engaging the upper surface of the upper substrate 2.
The housing 1 is thus able to receive and support two substrates 2 in individual spaced parallel planes.
Each of the slots 7 in the walls 6 of the housing 1 contains an electrical terminal 15, best seen in Figure 4.
Each terrninal 15 has a post portion 16 which projects through : .
.. : ~
108181;3 an individual aperture 17 in the bottom wall 8 of the housing 1 for reception in a hole in a printed circuit board (not shown). As shown in Figure 4 terminals 15 of two sizes can be used such that the posts 16 lie in two staggered rows. Each terminal 15 also has two independ-ently flexible contact fingers 18 and 19 extending in the opposite direction to the post portion 16 and each providing a contact surface 20 or 21 located in an individual one of the planes of the substrates 2 when in the housing 1 such as to engage an individual one of the contact pads 3 on one of the substrates 2. The contact finger 19 is relatively long and is thus sufficiently resilient while being straight, whereas the contact finger 18 is relatively short and is therefore reversely bent at 22 to impart sufficient resilience thereto.
Thus, with two substrates 2 mounted in the housing 1 as shown in Figures 2 to 4, the contact pads 3 on all four edges of each substrate 2 will be engaged by individual contact surfaces 20 or 21 of a terminal 15 and the substrates 2 can be electrically connected to conductors on a printed circuit board by plugging the post portions 16 of the terminals 15 into holes in the printed circuit board.
Each terminal 15 is retained in its slot 7 by a pimple 23 at the inner end of the post portion 16 engaging in a recess in the bottom wall 8 of the housing 1.
Each of the corner posts 4 and 5 of the housing 1 has a hole 24 in its free end, which hole 24 receive a peg 25 at a corner of a cover 26 which is applied to the housing 1 after the substrates 2 have been mounted therein in order to protect the substrates and also give rigidity to the .~
1~818~3 connector assembly. -~
A partlcularly advantageous feature of the connector described above is that the terminals 15 can be stamped and formed from sheet metal and are thus cheap and easy to manu~acture while still giving high contact forces in use.
: ' , .
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE AS FOLLOWS:
1. An electrical connector, for use in mounting two planar substrates on a printed circuit board or the like, com-prising a hollow housing of electrically insulating material having walls defining means to receive and support the sub-strates therein in superposed spaced parallel planes and to permit airflow through the housing, the housing carrying a plurality of electrical terminals each having a post portion projecting from the housing for reception in a hole in a printed circuit board or the like, and two independently flexible con-tact fingers extending in the opposite direction to the post portion, and each providing a contact surface located in an individual one of said planes such as to engage a contact on an edge of a substrate when located in that plane.
2. An electrical connector as claimed in Claim 1, in which the housing is substantially square in horizontal cross-section and has four resilient corner posts joined by slotted side walls, the slots in the side walls extending parallel to the corner posts and each slot containing one of the terminals.
3. An electrical connector as claimed in Claim 2, in which the side walls are of only about half the height of the corner posts.
4. An electrical connector as claimed in Claim 2, in which the housing has a bottom wall having upstanding projections which in use serve to support a substrate in the lower one of said planes.
5. An electrical connector as claimed in Claim 4, in which one pair of diagonally opposed corner posts are recessed at their free ends, the recesses being shaped to receive a corner of a sub-strate to support the substrate in the upper one of said planes.
6. An electrical connector as claimed in Claim 5, in which said one pair of corner posts have downwardly facing surfaces arranged to engage the upper surface of a substrate supported on the projections on the bottom wall of the housing.
7. An electrical connector as claimed in Claim 6, in which the other pair of diagonally opposed corner posts have downwardly facing surfaces which engage the upper surface of a substrate supported by said one pair of corner posts.
8. An electrical connector as claimed in Claim 7, in which said other pair of corner posts have chamfered free ends providing inwardly sloping surfaces.
9. An electrical connector as claimed in Claim 1, in which each terminal is stamped and formed from sheet metal with the post portion and the contact fingers all lying in a common plane.
10. An electrical connector as claimed in Claim 9, in which one of the contact fingers includes a reversely bent portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,811A CA1081813A (en) | 1977-01-17 | 1977-01-17 | Electrical connector for connecting ic packages to a p.c.b. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,811A CA1081813A (en) | 1977-01-17 | 1977-01-17 | Electrical connector for connecting ic packages to a p.c.b. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1081813A true CA1081813A (en) | 1980-07-15 |
Family
ID=4107736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA269,811A Expired CA1081813A (en) | 1977-01-17 | 1977-01-17 | Electrical connector for connecting ic packages to a p.c.b. |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1081813A (en) |
-
1977
- 1977-01-17 CA CA269,811A patent/CA1081813A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |