CN201112711Y - Electric connector terminal - Google Patents
Electric connector terminal Download PDFInfo
- Publication number
- CN201112711Y CN201112711Y CNU2007200447612U CN200720044761U CN201112711Y CN 201112711 Y CN201112711 Y CN 201112711Y CN U2007200447612 U CNU2007200447612 U CN U2007200447612U CN 200720044761 U CN200720044761 U CN 200720044761U CN 201112711 Y CN201112711 Y CN 201112711Y
- Authority
- CN
- China
- Prior art keywords
- electric connector
- connector terminal
- depressed part
- hole
- circuit board
- 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 - Lifetime
Links
Abstract
An electric connector terminal comprises a clamping part stored inside an insulating body of the electric connector terminal, and a contact part and a welding part, which are connected onto a chip module and a circuit board respectively. The contact part is positioned in the upper part of the electric connector terminal, and can be contacted with the relevant contact of the chip module to transmit electrical signals. The welding part is positioned at the bottom of the terminal and welded to the circuit board by surface mount technology (SMT). Before the electric connector terminal is welded on the circuit board, the bottom surface of the welding part thereof is pre-implanted with solder balls, wherein the bottom surface of the welding part is provided with a depressed part which is an arc-shaped inner side wall for storing and positioning the solder balls, and at least one through hole is provided between the inner side wall of the depressed part and the upper surface of the welding part. The through hole is provided between the inner side wall of the depressed part and the upper surface of the welding part, so that the gases produced by a soldering flux are exhausted via the through hole, thereby efficiently reducing cavity formation in solder balls after implantation, avoiding solder cracks and improving electrical conductivity and heat conductivity.
Description
[technical field]
The utility model is relevant a kind of electric connector terminal, refers in particular to a kind of electric connector terminal that is used to accept the connector of chip module.
[background technology]
Become stronger day by day as the processing speed and the function of central processing unit integrated circuit (IC) chip such as (CPU) at present, therefore the chip electric connection of externally carrying out signal input (I/O) is named a person for a particular job more and more, it is compact that yet its volume after being encapsulated but requires, event is as all own PGA (Pin Grid Array) that adopts of the encapsulation of the integrated circuit (IC) chip of central processing unit equal altitudes densification design, BGA (Ball Grid Array), even LGA packaged types such as (Land GridArray), but no matter which kind of packaged type is integrated circuit (IC) chip adopt, all must utilize electric connector and circuit board to electrically connect, therefore, in order to make electric connector cooperate the packaged type of integrated circuit (IC) chip, and steadiness and the processing procedure efficient of considering mutual electric connection between electric connector and circuit board, so generally an end of each electric connector terminal connects corresponding tin ball in electric connector, utilizing surface adhering method (SMT) that electric connector is welded in way on the circuit board again, is for producing the method for often using that electrically connects now between electric connector and circuit board.
Brought forward is described, can utilize the surface adhering method to link to each other in order to make between electric connector terminal and circuit board, and electric connector terminal must connect a tin ball earlier.As shown in Figure 1, a kind of electric connector terminal 1 ', it comprises contact site 10 ', weld part 11 ' and is contained in the interior holding parts 12 ' of electric connector insulating body (end diagram).Wherein contact site 10 ' is positioned at electric connector terminal 1 ' top and can contacts transmission of electric signals with the corresponding contacts of chip module (not shown), and weld part 11 ' then is positioned at electric connector terminal 1 ' bottom and adopts the surface adhering technology to weld mutually with circuit board (not shown).The lower surface 110 ' of weld part 11 ' is provided with the depressed part 111 ' that inwardly is the spherical arc shape recess, by depressed part 111 ' with the location tin ball (not shown), and the tin ball also can contact with the weld part 11 ' of electric connector terminal 1 ', carry out reflow afterwards, the tin ball melts and is planted on the electric connector terminal 1 ' that is connected on correspondence, and can be for the surface adhering processing procedure of follow-up electric connector (not shown) with circuit board.
Yet, for being planted, the tin ball is connected on the electric connector terminal 1 ', must be through the tin stove to carry out the operation of reflow, during reflow at first up with electric connector terminal 1 ' weld part 11 ', then its lower surface 110 ' is coated with one deck scolder, because the existence that weld part 11 ' lower surface 110 ' is gone up depressed part 111 ', the part scolder will accumulate in this depressed part 111 ', like this, the tin ball is melted by heat in the process of reflow, will coat the lower surface 110 ' of whole electric connector terminal 1 ' weld part 11 ', part collapses in the depressed part 111 ' of lower surface 110 ' simultaneously.The scolder that accumulates in like this in the depressed part 111 ' can be covered fully by the tin ball, cause the scolder of gaseous state to evaporate in the tin ball, and permanent set is in the tin ball.
[utility model content]
The purpose of this utility model is to provide a kind of can effectively reduce the novel electric connector terminal that produces tin ball cavity in planting ball heating process.
The purpose of this utility model is achieved in that a kind of electric connector terminal, can be welded on the circuit board and the electrical communication chip module, it comprise holding parts and be connected to chip module and circuit board on contact site and weld part, wherein the lower surface of weld part is provided with depressed part, be placed with the tin ball in the depressed part, wherein have at least one through hole between the upper surface of the medial surface of depressed part and weld part.The medial surface of described depressed part can be spherical arc shape.The axis of described through hole can be by depressed part the centre of sphere or perpendicular to the upper surface of weld part.
Compared with prior art, the beneficial effects of the utility model are: the through hole that is provided with between the upper surface by weld part and the medial surface of depressed part, the gas that scaling powder is produced is overflowed from through hole smoothly, thereby effectively avoided the corresponding gas that makes of depression profile can not overflow smoothly and cause in the tin spheroid of a part of gas entering part fusing and form the cavity, can prevent from the environmental testing of back, to produce the solder crack phenomenon and improve circuit and conduct electricity reliability and thermal conductivity with the tin ball shape.
[description of drawings]
Fig. 1 is the stereogram of electric connector terminal in the background technology.
Fig. 2 is the stereogram of the utility model electric connector terminal.
[embodiment]
As shown in Figure 2, be a preferred embodiment of the present utility model.This electric connector terminal 1 mainly comprises the holding parts 12 that is contained in a fixation in the electric connector insulating body (not shown), the contact site 10 that connects chip module (not shown) and the weld part 11 of connecting circuit plate (not shown).Wherein contact site 10 extends in the side 120 of holding parts 12, comprise kink 101 and terminal extended bend 102 on this kink 101, the sheet structure that weld part 11 vertically is bent to form for holding parts 12 bottoms, the two sides 120 of holding parts 12 are provided with some hangnails 121, so that electric connector terminal 1 is immobilizated in the insulating body.Weld part 11 is in an end vertical extent of holding parts 12 and go out, and to be soldered on the circuit board, its lower surface 110 is provided with the depressed part 111 that caves inward, and the medial surface of depressed part is a spherical arc shape; Have a through hole 113 between the medial surface of its upper surface 112 and depressed part 111, and the axis normal of this through hole is in upper surface 112 and pass the center of depressed part 111.
Through hole 113 by being provided with between the medial surface of upper surface 112 and depressed part 111 makes the scaling powder that accumulates in the depressed part 111, can evaporate into the external world by through hole 113 passages, can not covered by the tin bag, also just can not have the scolder that condenses in the tin ball.
It is to be noted; electric connector terminal of the present utility model not only is confined to above-described concrete structure; as long as the weld part lower surface has depressed part, and between the medial surface of weld part upper surface and depressed part, be provided with at least one through hole, all belong to the scope of protecting of the present utility model.
Claims (7)
1. electric connector terminal, can be welded on the circuit board and the electrical communication chip module, it comprise holding parts and be connected to chip module and circuit board on contact site and weld part, wherein the lower surface of weld part is provided with depressed part, be placed with the tin ball in the depressed part, it is characterized in that: have at least one through hole between the medial surface of described depressed part and the upper surface of weld part.
2. electric connector terminal as claimed in claim 1 is characterized in that: the medial surface of described depressed part is a spherical arc shape.
3. electric connector terminal as claimed in claim 2 is characterized in that: the axis of described through hole is by the center of depressed part.
4. electric connector terminal as claimed in claim 2 is characterized in that: the axis normal of described through hole is in the upper surface of weld part.
5. electric connector terminal as claimed in claim 1 is characterized in that: described contact site extends upward in the side of holding parts.
6. electric connector terminal as claimed in claim 1 is characterized in that: the two sides of described holding parts are provided with some hangnails.
7. electric connector terminal as claimed in claim 1 is characterized in that: described weld part is in an end vertical extent of holding parts and go out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200447612U CN201112711Y (en) | 2007-10-26 | 2007-10-26 | Electric connector terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200447612U CN201112711Y (en) | 2007-10-26 | 2007-10-26 | Electric connector terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201112711Y true CN201112711Y (en) | 2008-09-10 |
Family
ID=39964458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200447612U Expired - Lifetime CN201112711Y (en) | 2007-10-26 | 2007-10-26 | Electric connector terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201112711Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979654A (en) * | 2015-06-04 | 2015-10-14 | 凡甲电子(苏州)有限公司 | Electric connector and conductive terminal thereof |
-
2007
- 2007-10-26 CN CNU2007200447612U patent/CN201112711Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979654A (en) * | 2015-06-04 | 2015-10-14 | 凡甲电子(苏州)有限公司 | Electric connector and conductive terminal thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080910 |
|
| CX01 | Expiry of patent term |