TWI545843B - Electronic connector - Google Patents

Description

Electrical connector

This invention relates to an electrical connector, and more particularly to an electrical connector suitable for use in contact contacts (e.g., planar contacts or bump contacts).

Electrical connectors are typically used to electrically connect two electronic devices to achieve signal transmission or power supply. In the field of semi-conductive chip packaging technology, a Land Grid Array (LGA) is a high-density contact type applied to a line carrier, which arrays a plurality of planar contacts on the bottom surface of the line carrier. The planar contacts can be electrically connected to the integrated circuit chip mounted on the top surface of the line carrier via internal lines of the line carrier.

In order to mount an LGA-type line carrier to a circuit board, it is conventional to employ a special type of electrical connector that is provided with a plurality of upwardly curved resilient terminals on the base for respectively carrying downward movements. These planar pads of the line carrier, thus achieving an electrical connection between the line carrier and the electrical connector. In order to ensure contact between the resilient terminals and the planar contacts, the resilient terminals must be mechanically machined to bend upward to provide the desired shape of the spring force and arcuate at the ends of the resilient terminals to contact the planar pads.

The invention provides an electrical connector for electrically contacting a contact.

An electrical connector of the present invention is adapted to contact a contact. The electrical connector includes a base, a resilient terminal and a contact protrusion. The base has a recess. The resilient terminal is attached to the base and extends to the recess. The elastic terminal has a fixed end and a free end, the fixed end is connected to the base, and the free end is located in the groove and curved. The contact protrusion is connected to the elastic terminal. When the contact moves toward the groove, the contact can push the contact protrusion such that the elastic terminal is bent toward the bottom of the groove such that the free end abuts the bottom of the groove.

An electrical connector of the present invention is adapted to contact a contact. The electrical connector includes a base and a resilient terminal. The base has a recess. The resilient terminal is attached to the base and extends to the recess. The elastic terminal has a fixed end and a free end, the fixed end is connected to the base, and the free end is located in the groove and curved. When the contact moves toward the groove, the contact can push the resilient terminal toward the bottom of the groove such that the free end abuts the bottom of the groove.

Based on the above, in the electrical connector of the present invention, a groove is formed in the base and the elastic terminal is extended to the groove. Therefore, when the elastic terminal is pushed up by the contact (for example, the bump contact), the elastic terminal can be bent toward the bottom of the groove, so that the elastic terminal and the corresponding connection can be ensured by the elastic force generated by the elastic terminal after the deformation. Contact between points. In addition, the electrical connector may further have a contact protrusion disposed on the elastic terminal for contacting the contact (for example, a planar contact or a bump contact). In addition, the free end of the elastic terminal can be curved and elastic, thereby increasing the service life of the elastic terminal.

The above described features and advantages of the invention will be apparent from the following description.

50, 60‧‧‧ line carrier

52‧‧‧Flat joints

62‧‧‧Bump contacts

100, 200‧‧‧ electrical connectors

110, 210‧‧‧ Pedestal

112, 212‧‧‧ grooves

114a, 214a‧‧‧ core layer

114b, 214b‧‧‧ dielectric layer

114b-1, 214b-1‧‧‧ openings

114c, 214c‧‧‧ conductive column

114d, 214d‧‧‧ overlay

120, 220‧‧‧Flexible terminals

120a, 220a‧‧‧ fixed end

120b, 220b‧‧‧ free end

130‧‧‧Contact convex

140, 240‧‧‧ conductive layer

150, 250‧‧ ‧ protective layer

1 is a partial plan view of an electrical connector in accordance with an embodiment of the present invention.

2 is a cross-sectional view of the plurality of electrical connectors of FIG. 1 taken along line I-I.

Figure 3A is a cross-sectional view of the electrical connector of Figure 2 prior to contacting a planar contact.

Figure 3B is a cross-sectional view of the electrical connector of Figure 2 after contact with the planar contacts.

4 is a partial plan view of an electrical connector in accordance with another embodiment of the present invention.

Figure 5 is a cross-sectional view of the plurality of electrical connectors of Figure 4 taken along line II-II.

Figure 6A is a cross-sectional view of the electrical connector of Figure 5 prior to contacting the bump contacts.

Figure 6B is a cross-sectional view of the electrical connector of Figure 5 after contacting the bump contacts.

Figure 7A is a cross-sectional view of an electrical connector prior to contacting a bump contact, in accordance with another embodiment of the present invention.

Figure 7B is a cross-sectional view of the electrical connector of Figure 7A after contact with the bump contacts.

Figure 8A is a cross-sectional view of an electrical connector prior to contacting a bump contact, in accordance with another embodiment of the present invention.

Figure 8B is a cross-sectional view of the electrical connector of Figure 8A after contact with the bump contacts.

1 is a partial plan view of an electrical connector in accordance with an embodiment of the present invention; Figure 2 is a cross-sectional view of the plurality of electrical connectors of Figure 1 taken along line I-I. Referring to Figures 1 and 2, the electrical connector 100 of the present embodiment is adapted to contact one or more planar contacts (i.e., the planar contacts 52 of the line carrier 50 of Figure 3A). The electrical connector 100 includes a base 110, one or more resilient terminals 120, and one or more contact protrusions 130. The base 110 has one or more recesses 112. Each resilient terminal 120 is coupled to the base 110 and extends to a corresponding recess 112. Each of the elastic terminals 120 has elasticity and electrical conductivity. Each of the contact protrusions 130 is disposed on the corresponding elastic terminal 120. In the present embodiment, each of the elastic terminals 120 may extend horizontally to the corresponding groove 112.

3A is a cross-sectional view of the electrical connector of FIG. 2 prior to contacting a planar contact, and FIG. 3B is a cross-sectional view of the electrical connector of FIG. 2 after contact with a planar contact. Referring to FIG. 3A and FIG. 3B, when the planar contacts 52 of the line carrier 50 are moved toward the grooves 112, the planar contacts 52 can respectively push the contact protrusions 130 such that each of the elastic terminals 120 faces the corresponding The bottom of the groove 112 is curved, so that the contact between the elastic terminal 120 and the corresponding planar contact 52 can be ensured by the elastic force generated by the elastic terminal 120 after deformation.

Referring to FIG. 1 and FIG. 2 , in the embodiment, the base 110 can be a printed circuit board, and the material of the elastic terminal 120 can include copper. In particular, the pedestal 110 and the resilient terminal 120 can be fabricated by conventional printed circuit board fabrication techniques. Therefore, the pedestal 110 can include a core layer 114a, a dielectric layer 114b, one or more conductive pillars 114c, and a cover layer 114d. The opening 114b-1 of the dielectric layer 114b and the core layer 114a form a recess 112. . A copper layer (not labeled) disposed on the dielectric layer 114b may be patterned by etching and etching the mask to form the elastic terminal 120, or may be molded. The stamped metal foil is then pressed (applied) to the dielectric layer 114b to form the elastic terminal 120, so that the thickness of the elastic terminal 120 can be as small as 0.05 mm and can be in the range of 0.01 mm to 0.2 mm. The thickness and length of the resilient terminal 120 can be adjusted in accordance with the required spring force and contact area.

A fixed end 120a of the resilient terminal 120 is coupled to the base 110, and the conductive post 114c is connectable to the fixed end 120a of the resilient terminal 120. The cover layer 114d can cover the dielectric layer 114b and the fixed end 120a of the elastic terminal 120. The resilient terminal 120 further has a free end 120b located in the recess 112 and the contact projection 130 is located at the free end 120b. The contact protrusion 130 is higher than the cover 114d with respect to the groove 112. It should be noted that the present invention is not limited to fabrication of the susceptor 110 and the elastic terminal 120 by printed circuit board manufacturing techniques, and may be fabricated in other manners.

Referring to FIG. 1 and FIG. 2 , in the embodiment, the electrical connector 100 further has a conductive layer 140 (for example, a nickel layer) disposed on the elastic terminal 120 and the corresponding contact protrusion 130 . When the planar contact 52 of FIG. 3A or FIG. 3B and the contact protrusion 130 are in contact with each other, the planar contact 52 can be electrically connected to the elastic terminal 120 by the conductive layer 140 on the contact protrusion 130. The contact protrusion 130 may be made of an elastic material to have elasticity to ensure good contact between the planar contact 52 and the contact protrusion 130. In addition, a protective layer 150 (for example, a gold layer) may be disposed on the conductive layer 140 at a region where the contact protrusion 130 is in contact with the planar contact 52 to improve durability. In another embodiment, when the material of the contact protrusion 130 is electrically conductive and the planar contact 52 of FIG. 3A or FIG. 3B can be electrically connected to the elastic terminal 120, the conductive layer 140 can be omitted.

The above embodiment is applied to the contact of the elastic terminal with the planar contact. In the present invention, a similar concept can be applied to the contact of the elastic terminal with the bump contact, and another embodiment will be described below.

4 is a partial plan view of an electrical connector in accordance with another embodiment of the present invention, and FIG. 5 is a cross-sectional view of the plurality of electrical connectors of FIG. 4 taken along line II-II. Referring to FIG. 4 and FIG. 5, the electrical connector 200 of the present embodiment is adapted to contact one or more bump contacts (ie, the bump contacts 62 of the line carrier 60 of FIG. 6A), wherein the bump contacts The shape is, for example, a spherical shape, a column shape, or a tapered shape. The electrical connector 200 includes a base 210 and one or more resilient terminals 220. The base 210 has one or more recesses 212. Each resilient terminal 220 is coupled to the base 210 and extends to a corresponding recess 212. The elastic terminal 220 has elasticity and electrical conductivity. In the present embodiment, each of the elastic terminals 220 extends horizontally to the corresponding groove 212.

Figure 6A is a cross-sectional view of the electrical connector of Figure 5 prior to contacting the bump contacts, and Figure 6B is a cross-sectional view of the electrical connector of Figure 5 after contacting the bump contacts. Referring to FIGS. 6A and 6B, when the bump contacts 62 of the line carrier 60 are moved toward the recesses 212, the bump contacts 62 can respectively push the elastic terminals 220 such that each of the elastic terminals 220 faces. The bottom of the corresponding groove 212 is curved, so that the contact between the elastic terminal 220 and the corresponding bump contact 62 can be ensured by the elastic force generated by the elastic terminal 220 after deformation.

Referring to FIG. 4 and FIG. 5 , in the embodiment, the susceptor 210 can be a printed circuit board, and the material of the elastic terminal 220 can include copper. In particular, the pedestal 210 and the resilient terminal 220 can be fabricated by conventional printed circuit board fabrication techniques. therefore, The susceptor 210 can include a core layer 214a, a dielectric layer 214b, one or more conductive pillars 214c, and a cover layer 214d. The opening 214b-1 of the dielectric layer 214b and the core layer 214a form a recess 212. A copper layer (not labeled) disposed on the dielectric layer 214b may be patterned by etching and etching the mask to form the elastic terminal 220, or the metal foil may be stamped with a mold to press (paste) the dielectric layer 214b. To form the elastic terminal 220, the thickness of the elastic terminal 220 can be as small as 0.05 mm and can be in the range of 0.01 mm to 0.2 mm. The thickness and length of the resilient terminal 220 can be adjusted in accordance with the desired spring force and contact area.

A fixed end 220a of the resilient terminal 220 is coupled to the base 210, and the conductive post 214c is connectable to the fixed end 220a of the resilient terminal 220. The cover layer 214d can cover the dielectric layer 214b and the fixed end 220a of the elastic terminal 220. The resilient terminal 220 further has a free end 220b that is located in the recess 212. In addition, in the embodiment, the electrical connector 200 further has a conductive layer 240 (for example, a nickel layer) and a protective layer 250 (for example, a gold layer) disposed on the elastic terminal 220 to improve durability. The conductive layer 240 facilitates adhesion of the protective layer 250 to the resilient terminal 220. In another embodiment not shown, there may be only the protective layer 250 without the conductive layer 240. It should be noted that the present invention is not limited to the fabrication of the susceptor 210 and the elastic terminal 220 by the printed circuit board manufacturing technology, and may be fabricated in other manners.

Figure 7A is a cross-sectional view of an electrical connector prior to contacting a bump contact of another embodiment of the present invention, and Figure 7B is a cross-sectional view of the electrical connector of Figure 7A after contact with the bump contact. Referring to FIG. 7A and FIG. 7B, the free end 120b of the elastic terminal 120 of the present embodiment is more curved than the embodiment of FIG. 3A and FIG. 3B. Such as U-shaped or V-shaped, or other elastic shapes. Thus, as the planar contact 52 moves toward the recess 112, the planar contact 52 can push the resilient terminal 120 toward the bottom of the recess 112 such that the free end 120b abuts the bottom of the recess 112. As shown in Figure 7B. In the present embodiment, the curved free end 120b itself may have elasticity, thereby increasing the service life of the elastic terminal 120.

Figure 8A is a cross-sectional view of an electrical connector prior to contacting a bump contact, and Figure 8B is a cross-sectional view of the electrical connector of Figure 8A after contact with the bump contact, in accordance with another embodiment of the present invention. Referring to FIGS. 8A and 8B, the free end 220b of the resilient terminal 220 of the present embodiment is more curved, such as U-shaped or V-shaped, or other resilient shape, as compared to the embodiment of FIGS. 6A and 6B. Therefore, when the bump contact 62 moves toward the groove 212, the bump contact 62 can push the elastic terminal 220 to bend toward the bottom of the groove 212 such that the free end 220b abuts against the bottom of the groove 212. As shown in Figure 7B. In the present embodiment, the curved free end 220b itself may have elasticity, thereby increasing the service life of the resilient terminal 220.

In summary, in the electrical connector of the present invention, a groove is formed in the base and the elastic terminal is extended to the groove. Therefore, when the elastic terminal is pushed up by the contact (for example, the bump contact), the elastic terminal can be bent toward the bottom of the groove, so that the elastic terminal and the corresponding connection can be ensured by the elastic force generated by the elastic terminal after the deformation. Contact between points. In addition, the electrical connector may further have a contact protrusion disposed on the elastic terminal for contacting the contact (for example, a planar contact or a bump contact). In addition, the free end of the elastic terminal can be curved and elastic, thereby increasing the service life of the elastic terminal.

Although the present invention has been disclosed above by way of example, it is not intended to limit the present invention. The scope of the present invention is defined by the scope of the appended claims, which are defined by the scope of the appended claims, without departing from the spirit and scope of the invention. quasi.

50‧‧‧Line carrier

52‧‧‧Flat joints

100‧‧‧Electrical connector

110‧‧‧Base

112‧‧‧ Groove

120‧‧‧Flexible terminal

120a‧‧‧Fixed end

120b‧‧‧Free end

130‧‧‧Contact convex

Claims (10)

An electrical connector adapted to contact a contact, the electrical connector comprising: a base having a recess; a resilient terminal connected to the base and extending to the recess, wherein the resilient terminal has a fixed And a free end, the fixed end is connected to the base, the free end is located in the groove and is curved; a contact protrusion is connected to the elastic terminal and is located at the free end, wherein when the contact is oriented When the groove moves, the contact can push the elastic terminal to bend toward the bottom of the groove, so that the free end abuts the bottom of the groove; a conductive layer is disposed on the elastic terminal and the contact protrusion And a protective layer disposed on the conductive layer and located in a region where the contact protrusion contacts the planar contact. The electrical connector of claim 1, wherein the free end is U-shaped or V-shaped. The electrical connector of claim 1, wherein the base further comprises a cover layer, and the contact protrusion is higher than the cover layer with respect to the groove, the contact is a planar contact, when When the planar contact moves toward the groove, the planar contact can push the contact protrusion such that the resilient terminal is bent toward the bottom of the groove. The electrical connector of claim 1, wherein the base is a printed circuit board, and the material of the elastic terminal comprises copper. The electrical connector of claim 1, wherein the contact protrusion has electrical conductivity. The electrical connector of claim 1, wherein the contact protrusion has elasticity. An electrical connector adapted to contact a contact, the electrical connector comprising: a base having a recess; a resilient terminal connected to the base and extending to the recess, wherein the resilient terminal has a fixed And a free end, the fixed end is connected to the base, the free end is located in the groove and curved, and when the contact moves toward the groove, the contact can push the elastic terminal toward the The bottom of the groove is bent such that the free end abuts the bottom of the groove; a conductive layer is disposed on the elastic terminal; and a protective layer is disposed on the conductive layer, and at least at the free end The area of point contact. The electrical connector of claim 7, wherein the free end is U-shaped or V-shaped. The electrical connector of claim 7, wherein the contact is a bump contact, and when the bump contact moves toward the groove, the bump contact can push the elastic terminal toward The bottom of the groove is curved. The electrical connector of claim 7, wherein the base is a printed circuit board, and the material of the elastic terminal comprises copper.