CN100373711C - Terminal and its electro-plating method - Google Patents
Terminal and its electro-plating method Download PDFInfo
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- CN100373711C CN100373711C CNB2006100326247A CN200610032624A CN100373711C CN 100373711 C CN100373711 C CN 100373711C CN B2006100326247 A CNB2006100326247 A CN B2006100326247A CN 200610032624 A CN200610032624 A CN 200610032624A CN 100373711 C CN100373711 C CN 100373711C
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Abstract
The present invention relates to a terminal which is mainly used for inserting and plugging type electric connector terminals and comprises base materials and each coating electroplated on the base materials, wherein the coating is provided with at least one gold coating and a nickel coating plated on the gold coating. The present invention also relates to an electroplating method for the terminal, which mainly comprises the following steps: providing base materials; carrying out degreasing treatment for the terminal; acid-washing the terminal; electroplating on the base materials, wherein the electroplating step comprises gold plating and a nickel coating plating on the gold coating. Compared with the prior art, the present invention has the advantages that a nickel coating is plated on the gold coating, good electric conductive performance of the terminal is ensured, the corrosion resistance and the abrasion resistance of the terminal are also simultaneously improved, and the service life of the terminal can be effectively ensured.
Description
[technical field]
The present invention relates to a kind of terminal and electro-plating method thereof.
[background technology]
In the general electric connector, have good electrical conductivity when terminal supportor is contacted with electric connector terminal, need at this contact area plating.In practical operation, need prior to the substrate surface plated with nickel, and then plate one deck gold.Be to have disclosed method gold-plated after first nickel plating on the terminal in No. the 5th, 307,562, the United States Patent (USP) of " terminal manufacturing method (Method For Making Contact) " as the denomination of invention of on May 3rd, 1994 bulletin.In addition, the denomination of invention of on September 17th, 2002 bulletin is also to have disclosed gold-plated terminal after the nickel plating of terminal substrate surface elder generation in No. the 6th, 451,449, the United States Patent (USP) of " terminal material and terminal (Terminal Material And Terminal) ".In the above patent, all be on the basis of nickel coating, to have plated one deck gold, increase the conductivity or the non-oxidizability of terminal.
Though the terminal that this electro-plating method is made can guarantee terminal supportor and terminal and have good electrical conductivity, can not guarantee the resistance to wear and the corrosion resistance of the contact portion of terminal, particularly for the terminal of test type socket connector.Because test type socket connector need be repeatedly used, thus need in the use to guarantee better wear resistance and corrosion resistance, thus be necessary to propose a kind of new terminal and electro-plating method thereof, to guarantee the resistance to wear and the corrosion resistance of terminal.
[summary of the invention]
Purpose of the present invention is for providing the terminal of a kind of tool excellent abrasive resistance and corrosion resistance.
Another object of the present invention is for providing a kind of electro-plating method that improves terminal resistance to wear and corrosion resistance.
Terminal of the present invention is mainly used in the plug-type connector terminals, comprises base material and electroplates each coating on base material, and described coating is provided with at least one gold plate and is plated in nickel coating on the gold plate, and this nickel coating is as the outermost layer of terminal.The electro-plating method of terminal of the present invention mainly comprises: the step that base material is provided; Terminal is carried out the step of ungrease treatment; Terminal is carried out the step of pickling; Step at the enterprising electroplating of base material; The step of this plating comprises gold-plated step and plates the step of one deck nickel coating that on gold plate this nickel coating is as the outermost layer of terminal.
Compared with prior art, the present invention has following advantage: nickel plating coating on gold plate, and this nickel coating is as the outermost layer of terminal, when guaranteeing that terminal has good electrical conductivity, also improve the corrosion resistance and the resistance to wear of terminal, can effectively guarantee the useful life of terminal.
[description of drawings]
Fig. 1 is the schematic diagram of terminal of the present invention;
Fig. 2 is the coating schematic diagram in termination contact of the present invention district;
Fig. 3 is that flow chart is made in the plating of terminal of the present invention.
[embodiment]
See also Fig. 1 and Fig. 2, electric connector terminal 10 of the present invention is mainly used in the plug-type electric connector, and wherein the contact zone 11 of terminal 10 often contacts with other electronic building brick (not shown) plug, so contact zone 11 needs good anti-corrosion and resistance to wear.
Common corrosion resistance and resistance to wear and conductivity in order to strengthen terminal 10, need one or more layers metal of plating on terminal 10, and the base material 20 of terminal 10 contact zones 11 is generally bronze or phosphor-copper, also can be other copper alloy or other alloy, for contact impedance, enhancing corrosion resistance and the sliding that reduces terminal, before the plated with gold coating 40, on the whole surface of terminal 10, plate first nickel coating 30 earlier, in case not-go-end 10 is oxidized, influence its electric conductivity.On the contact zone 11 of terminal 10, plate one deck gold plate 40 more then, can improve the corrosion resistance and the conductivity of terminal, and gold is that precious metal and material are softer, through quick-wearing very after the plug repeatedly, can cause impedance to rise, in order to overcome the problems referred to above, need to plate second nickel coating 50 again at the skin of gold plate 40, and this nickel coating 50 is as the outermost layer of terminal, because nickel is hard and can bear repeatedly plug, can improve the corrosion resistant mill property of terminal.The thickness of wherein above-mentioned second nickel coating 50 is 13～50 times of gold plate 40 thickness, and the thickness of nickel coating is 0.60～1.1um, and the thickness of gold plate is 0.02～0.08um.
Please consult Fig. 3 simultaneously, for to nickel plating gold nickel three floor coating in the termination contact district, need through following steps: step 61, blowing is about to base material 20 and is ready to; Step 62, dirt on the terminal base material is removed in degreasing; Step 63, pickling is cleaned the removal oxide layer to base material; Step 64, nickel plating plates first nickel coating 30 on the surface of whole terminal; Step 65, gold-plated, in termination contact district 11, plate one deck gold plate 40 again, and the thickness of gold plate 40 is 0.02～0.08um; Step 66, second nickel coating 50 is plated in nickel plating again on gold plate 40, and the thickness of this second nickel coating is 0.60～1.1um, and the thickness of second nickel coating 50 is 13～50 times of gold plate 40 thickness, and second nickel coating 50 is as the outermost layer of terminal; Step 67 is carried out rewinding.
Terminal of the present invention and electro-plating method thereof be nickel plating coating on gold plate, when guaranteeing that terminal has good electrical conductivity, has also improved the corrosion resistance and the resistance to wear of terminal, can effectively guarantee the useful life of terminal.
The present invention also can not need to plate first nickel coating on base material, and direct plated with gold coating, and on this gold plate the method for plated with nickel coating, can guarantee that equally terminal is when having satisfactory electrical conductivity, also can improve the corrosion resistance and the resistance to wear of terminal, and can effectively guarantee the useful life of terminal.
25 ℃ of temperature, under the humidity 65%RH condition, use the Manual pressure test machine that the sampling terminal is carried out the durability test report, its test result is as shown in table 1:
The report of table 1 terminal durability test
(unit: m Ω)
As can be seen from the above table, gold-plated after in the ban at the bottom of the nickel plating, before plug, the resistance value of terminal is 9.02m Ω; Through 1500 times repeatedly the plug after, the resistance value of terminal is upgraded to 11.47m Ω; Again through 1500 plugs repeatedly (promptly being equivalent to) altogether through 3000 plugs, its impedance is upgraded to 28.47m Ω once more, from these data as can be seen, terminal is through repeatedly plug, its resistance value obviously raises, and fluctuation range is very big, influences the normal use of terminal, so this terminal corrosion resistance and resistance to wear are all relatively poor, useful life is also shorter.And nickel plating at the gold-plated end earlier, and be somebody's turn to do the outermost layer of back nickel plating as terminal, before plug, the resistance value of terminal is 8.75m Ω; Through 1500 times repeatedly the plug after, the resistance value of terminal is 9.46m Ω, with respect to the plug before resistance value, its fluctuation range is less; Again through 1500 plugs repeatedly (promptly being equivalent to) altogether through 3000 plugs, its resistance value also slightly raises, be 12.87m Ω, but resistance value with respect to " gold-plated after at the bottom of the first nickel plating ", " nickel plating at the gold-plated end " is less through the change in impedance value after plugging repeatedly, and simultaneously, also the impedance of " gold-plated after at the bottom of the first nickel plating " is little in the impedance of the terminal of " nickel plating at the gold-plated end " when 0 plug, improve the corrosion resistance and the resistance to wear of terminal, can effectively guarantee the useful life of terminal.Please see the experimental data of " gold-plated nickel plating again after at the bottom of the nickel plating " again, it is before plug, and the resistance value of terminal is 6.53m Ω; Through 1500 times repeatedly the plug after, the resistance value of terminal is 6.59m Ω, with respect to the plug before resistance value, its fluctuation range is very little; The resistance value that plugs it through 3000 times is 9.63m Ω, from experimental data, can find out, " gold-plated nickel plating again after at the bottom of the first nickel plating " its through repeatedly the plug, the change in impedance value of terminal is also less, and the impedance of terminal when 0 plug also obviously reduces than " gold-plated after at the bottom of the first nickel plating ", so when guaranteeing that terminal has good electrical conductivity, also improved the corrosion resistance and the resistance to wear of terminal, can effectively guarantee the useful life of terminal.
Claims (10)
1. terminal comprises base material and electroplates each coating on base material, it is characterized in that: described coating is provided with at least one gold plate and is plated in nickel coating on the gold plate, and this nickel coating is as the outermost layer of terminal.
2. terminal as claimed in claim 1 is characterized in that: each coating is plated on the zone that contacts with other electron component on the terminal successively.
3. terminal as claimed in claim 1 is characterized in that: the thickness of nickel coating is 13～50 times of gold plate thickness.
4. terminal as claimed in claim 1 is characterized in that: the thickness of nickel coating is 0.60～1.1um, and the thickness of gold plate is 0.02～0.08um.
5. terminal as claimed in claim 1 is characterized in that: also be provided with another nickel coating between base material and the gold plate.
6. the electro-plating method of a terminal comprises: the step that base material is provided; Terminal is carried out the step of ungrease treatment; Terminal is carried out the step of pickling; Step at the enterprising electroplating of base material; It is characterized in that: the step of this plating comprises gold-plated step and plate the step of one deck nickel coating on gold plate, and this nickel coating is as the outermost layer of terminal.
7. as the electro-plating method of terminal as described in the claim 6, it is characterized in that: each coating is plated on the zone that contacts with other electronic building brick on the terminal successively.
8. as the electro-plating method of terminal as described in the claim 6, it is characterized in that: the thickness of nickel coating is 13～50 times of gold plate thickness.
9. as the electro-plating method of terminal as described in the claim 6, it is characterized in that: the thickness of nickel coating is 0.60～1.1um, and the thickness of gold plate is 0.02～0.08um.
10. as the electro-plating method of terminal as described in the claim 6, it is characterized in that: before gold-plated step, also comprise the step of another nickel coating of plating on base material earlier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100326247A CN100373711C (en) | 2006-01-04 | 2006-01-04 | Terminal and its electro-plating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100326247A CN100373711C (en) | 2006-01-04 | 2006-01-04 | Terminal and its electro-plating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808795A CN1808795A (en) | 2006-07-26 |
| CN100373711C true CN100373711C (en) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100326247A Expired - Fee Related CN100373711C (en) | 2006-01-04 | 2006-01-04 | Terminal and its electro-plating method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856694B (en) * | 2011-07-01 | 2015-02-25 | 富士康(昆山)电脑接插件有限公司 | Electric connector terminal |
| CN106048680B (en) * | 2016-07-22 | 2018-05-22 | 东莞普瑞得五金塑胶制品有限公司 | Special coating for resisting corrosion of mobile phone quick charging interface when being electrified |
| CN108461947A (en) * | 2018-04-18 | 2018-08-28 | 奕东电子(常熟)有限公司 | A kind of oxidation resistant IC card seat terminal of rub resistance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4666796A (en) * | 1984-09-26 | 1987-05-19 | Allied Corporation | Plated parts and their production |
| US4895771A (en) * | 1988-06-14 | 1990-01-23 | Ab Electronic Components Limited | Electrical contact surface coating |
| CN1591989A (en) * | 2003-08-30 | 2005-03-09 | 富士康(昆山)电脑接插件有限公司 | Terminal and its electroplating method |
-
2006
- 2006-01-04 CN CNB2006100326247A patent/CN100373711C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4666796A (en) * | 1984-09-26 | 1987-05-19 | Allied Corporation | Plated parts and their production |
| US4895771A (en) * | 1988-06-14 | 1990-01-23 | Ab Electronic Components Limited | Electrical contact surface coating |
| CN1591989A (en) * | 2003-08-30 | 2005-03-09 | 富士康(昆山)电脑接插件有限公司 | Terminal and its electroplating method |
Non-Patent Citations (1)
| Title |
|---|
| 铍青铜接插件电镀耐磨金. 胡培荣，顾志平，丁家铭，杨晓东.苏州大学学报，第13卷第4期. 1997 * |
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| Publication number | Publication date |
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| CN1808795A (en) | 2006-07-26 |
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