CN103510084A - Preoxidation method of kovar leads for metal housings - Google Patents
Preoxidation method of kovar leads for metal housings Download PDFInfo
- Publication number
- CN103510084A CN103510084A CN201310454407.7A CN201310454407A CN103510084A CN 103510084 A CN103510084 A CN 103510084A CN 201310454407 A CN201310454407 A CN 201310454407A CN 103510084 A CN103510084 A CN 103510084A
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- China
- Prior art keywords
- preoxidation
- wire
- metal
- lead
- oxidation
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- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002184 metal Substances 0.000 title claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 20
- 229910000833 kovar Inorganic materials 0.000 title abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 30
- 230000003647 oxidation Effects 0.000 claims abstract description 28
- 239000000126 substance Substances 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000001311 chemical methods and process Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 abstract description 8
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 13
- 239000011521 glass Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000012212 insulator Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 229910052752 metalloid Inorganic materials 0.000 description 4
- 150000002738 metalloids Chemical class 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000004320 controlled atmosphere Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000012611 container material Substances 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Joining Of Glass To Other Materials (AREA)
Abstract
The invention discloses a preoxidation method of kovar leads for metal housings. In the method, a solution chemical oxidation method is used as a preoxidation process of the kovar leads for the metal housings. The chemical oxidation method is used for preparing an oxidant-containing chemical solution to perform preoxidation on the kovar leads. Compared with the air oxidation and controllable nitrogen-base atmosphere oxidation method used at home and abroad in the prior art, the method has the advantages of simple operation, good consistency in preoxidation and the like.
Description
Technical field
The present invention relates to the encapsulation field of a kind of electronics and O-E Products, particularly a kind of metal-packaged shell use can be cut down the method for pre-oxidizing of lead-in wire, be by the chemical oxidation solution that contains oxygenant for to the method that can cut down lead-in wire and carry out preoxidation for metal shell, belong to metal-packaged shell and manufacture field.
Background technology
In the manufacturing processed of metal-packaged shell; need to sinter the glass insulator of metal lead wire and metal casing body special use into a shell integral body; can cut down the lead-in wire effect that inside and outside is electrically connected to of flaking in shell, the insulator of sintering vitreous plays the gentle privacy protection of electrical isolation.Can cut down is the metal alloy that a kind of main content is iron, nickel, cobalt, also referred to as 4J29 alloy, is a kind of more special expanding metal alloy of determining, because its coefficient of expansion and glass insulator approaches, so often adopt kovar alloy to manufacture metal-packaged shell.Because the glass of pure metallic surface and melting can not produce immersional wetting, so that firmly combination can not be produced, so will first carry out preoxidation to metal in needs metal and glass-sealed occasion, just glass sintering can be carried out.So can cut down lead-in wire, will be oxidized in advance, the outside surface that makes to cut down lead-in wire produces the zone of oxidation that one deck is fine and close, complete, continuous, have suitable thickness, has good tack, the resistance to air loss of sealing-in and sealing strength after guarantee and glass insulator sintering.In kovar alloy, contain the metallic iron over half, that play sealing-in effect is mainly the Fe that preoxidation generates
3o
4can produce firmly sealing-in with glass.Pre-oxidation process is mainly also how to make the iron that can cut down wire surface be oxidized to Z 250 to be used for and glass generation sealing-in effect.
From metal-packaged shell invention, come out to come, can cut down the pre-oxidation process that goes between and also make constant progress always, from atmospheric oxidation,, H
2mixed gas, conventional gas ratio is N
2--1%H
20--0.4%H
2, 1000 ℃ of sealing temperatures, 10 minutes time, oxidated layer thickness 2～10 μ m.Use controlled nitrogen-based atmosphere oxidation style oxidized metal lead-in wire effect relatively good, but it is very high to the requirement of equipment, output investment ratio is larger, for small business, drops into and has certain difficulty.And using air oxidation process and steam oxidation method to carry out preoxidation, the resistance to air loss of the thickness of zone of oxidation, density and product and sealing strength all can not get reliable assurance.And above-mentioned oxidation style is to be placed in stove in being deposited in container again and to be oxidized numerous lead-in wires is unordered when implementing, in oxidising process, can not stir lead-in wire, therefore the lead-in wire place of contacting with each other all can hide mutually, so that these zone of oxidation that hide point will be thinner than the zone of oxidation of normal surface, if this covering point, just in time in glass insulator junction, just likely reduces resistance to air loss and sealing strength.
Summary of the invention
Goal of the invention: the object of the invention is for the deficiencies in the prior art, provide the chemical solution that a kind of use contains oxygenant can cut down to metal shell the method that lead-in wire carries out preoxidation, making metal shell through the method preoxidation can cut down lead-in wire can produce and infiltrate completely and firmly be combined with the glass insulator of melting, to meet the requirement of military metal shell resistance to air loss, insulativity, physical strength aspect.
Technical scheme: the invention discloses a kind of chemical solution with preparation and can cut down to metal shell the method that lead-in wire carries out preoxidation.For the weak point of air oxidation process, steam oxidation method, controlled atmosphere oxidation style in metal-packaged shell manufacturing process, chemical oxidization method conventional in electroplating technology is introduced to metal-packaged shell manufacturing process.With the method preparation of preparation chemical solution, be used for carrying out cutting down the chemical oxidation solution of lead-in wire preoxidation, during oxidation, can cut down lead-in wire and be placed in solution, owing to containing oxygenant in solution, so at room temperature oxidizing reaction can spontaneously be carried out, in reaction process, carry out suitable stirring and stir, when reaction proceeds to termination reaction when suitable, just can obtain the consistent zone of oxidation of preoxidation layer.
Comprise the following steps:
Step 1, the container that is ready to hold and carry out preoxidation, container material quality can be that glass, plastics etc. can not produce with solution the material of chemical reaction;
Step 2, adds water, oxygenant and other reagent by proportioning;
Step 3, adds the cut down lead-in wire of respective numbers;
Step 4, at solution, with can cut down wire surface and start to produce chemical reaction and be the oxidizing reaction of wire surface time, stirred solution stir lead-in wire, makes the lead-in wire of stacking frequently change point of contact frequently;
Step 5, when chemical reaction proceeds to the time of technique defined, termination reaction, pours solution into another container.The well-oxygenated lead-in wire that cuts down is cleaned up and dry for standby;
This method for pre-oxidizing is mainly used in cutting down the preoxidation of lead-in wire, and the lead-in wire after preoxidation goes for the manufacture of TO metalloid shell, cavity metalloid shell, flat-type metal shell and other metal-packaged shell that can go between with present method preoxidation.
Beneficial effect: use the chemical solution that contains oxygenant to be oxidized metallic surface, the technique that electroplating industry is conventional, but due to the singularity of metal-packaged shell, what in metal-packaged shell manufacturing, continue to use is the nitrogen-based atmosphere oxidation style of air oxidation process, steam oxidation method and controlled atmosphere always.Solution chemistry oxidizing process is introduced to metal shell and manufacture field, can bring following beneficial effect: facility investment is few; Energy consumption is few; Schedule of operation is simple; Preoxidation layer high conformity.
Use method of the present invention, because can save the oxidized still of controlled atmosphere, saved facility investment; Preoxidation operation can at room temperature be carried out in addition, no longer need under the high temperature of 1000 ℃, carry out, and there is no energy consumption; Can cut down lead-in wire and in solution, carry out pre-oxidation, the time can accurately control to second, so can cut down lead-in wire preoxidation high conformity.
Embodiment
The invention discloses the chemical oxidation method that a kind of metal-packaged shell can cut down lead-in wire preoxidation, comprise the following steps:
Step 1, the container that is ready to hold and carry out preoxidation, container material quality can be that glass, plastics etc. can not produce with solution the material of chemical reaction;
Step 2, adds water, oxygenant and other reagent by proportioning, by standby after solution stirring filtration clarification;
Step 3, weighs in the balance and gets the cut down lead-in wire that needs preoxidation quantity, and clean up;
Step 4, puts into the cut down lead-in wire cleaning up in the container that holds preoxidation solution;
Step 5, when solution, to start to produce bubble be wire surface while starting oxidizing reaction with cutting down wire surface, stirred solution stir lead-in wire, changes point of contact frequently frequently, allows the covered place of point of contact cover by oxidized layer;
Step 6, when proceeding to the time of technique defined at chemical reaction, outwell solution and add clear water, chemical reaction stops;
Step 7, the well-oxygenated lead-in wire that cuts down is cleaned up and dry for standby.
Cut down lead-in wire by aforesaid method preoxidation can directly apply to the sintering process of metal-packaged shell, and present method is applicable to the manufacture of the metal shell of TO metalloid shell, cavity metalloid shell, flat-type metal shell and other available present method preoxidation lead-in wire.
The invention provides thinking and method that a kind of preoxidation metal-packaged shell can cut down lead-in wire; method and the approach of this technical scheme of specific implementation are a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. one kind is used solution chemistry method for oxidation as the method that can cut down lead-in wire pre-oxidation process for metal shell, while it is characterized in that cutting down lead-in wire preoxidation, can cutting down lead-in wire outside surface with metal, contact what work be chemical solution liquid medium, rather than the gaseous media such as the air atmosphere of routine use, nitrogen-based atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310454407.7A CN103510084A (en) | 2013-09-24 | 2013-09-24 | Preoxidation method of kovar leads for metal housings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310454407.7A CN103510084A (en) | 2013-09-24 | 2013-09-24 | Preoxidation method of kovar leads for metal housings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103510084A true CN103510084A (en) | 2014-01-15 |
Family
ID=49893497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310454407.7A Pending CN103510084A (en) | 2013-09-24 | 2013-09-24 | Preoxidation method of kovar leads for metal housings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103510084A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111850538A (en) * | 2020-08-03 | 2020-10-30 | 广东格斯泰气密元件有限公司 | Method for improving sealing strength of glass and metal |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56169352A (en) * | 1980-05-30 | 1981-12-26 | Fuji Electric Co Ltd | Manufacture of glass molded semiconductor device |
| JPH01225787A (en) * | 1988-03-03 | 1989-09-08 | Mitsubishi Electric Corp | Cleaning solution for oxide film formed on kovar alloy by heat treatment |
| CN101117276A (en) * | 2007-07-19 | 2008-02-06 | 北京科技大学 | An Integrated Metal-Glass Sealing Method |
| CN102277602A (en) * | 2011-07-13 | 2011-12-14 | 中国振华集团群英无线电器材厂 | Early stage metal treating method for metal-glass sealing technology |
| CN102418124A (en) * | 2011-11-25 | 2012-04-18 | 中国电子科技集团公司第十八研究所 | Method for silvering kovar alloy interconnection piece |
| US20130025745A1 (en) * | 2011-07-27 | 2013-01-31 | Texas Instruments Incorporated | Mask-Less Selective Plating of Leadframes |
| CN102943290A (en) * | 2012-11-26 | 2013-02-27 | 中国电子科技集团公司第十三研究所 | Method for electroplating of nickel-cobalt alloy on electronic packaging casing |
-
2013
- 2013-09-24 CN CN201310454407.7A patent/CN103510084A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56169352A (en) * | 1980-05-30 | 1981-12-26 | Fuji Electric Co Ltd | Manufacture of glass molded semiconductor device |
| JPH01225787A (en) * | 1988-03-03 | 1989-09-08 | Mitsubishi Electric Corp | Cleaning solution for oxide film formed on kovar alloy by heat treatment |
| CN101117276A (en) * | 2007-07-19 | 2008-02-06 | 北京科技大学 | An Integrated Metal-Glass Sealing Method |
| CN102277602A (en) * | 2011-07-13 | 2011-12-14 | 中国振华集团群英无线电器材厂 | Early stage metal treating method for metal-glass sealing technology |
| US20130025745A1 (en) * | 2011-07-27 | 2013-01-31 | Texas Instruments Incorporated | Mask-Less Selective Plating of Leadframes |
| CN102418124A (en) * | 2011-11-25 | 2012-04-18 | 中国电子科技集团公司第十八研究所 | Method for silvering kovar alloy interconnection piece |
| CN102943290A (en) * | 2012-11-26 | 2013-02-27 | 中国电子科技集团公司第十三研究所 | Method for electroplating of nickel-cobalt alloy on electronic packaging casing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111850538A (en) * | 2020-08-03 | 2020-10-30 | 广东格斯泰气密元件有限公司 | Method for improving sealing strength of glass and metal |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140115 |