CN204825032U - Arc spot that discharges is abound with vacuum cathode arc source of target surface - Google Patents
Arc spot that discharges is abound with vacuum cathode arc source of target surface Download PDFInfo
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- CN204825032U CN204825032U CN201520554132.9U CN201520554132U CN204825032U CN 204825032 U CN204825032 U CN 204825032U CN 201520554132 U CN201520554132 U CN 201520554132U CN 204825032 U CN204825032 U CN 204825032U
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Abstract
The utility model provides an arc spot that discharges is abound with vacuum cathode arc source of target surface, including a dull and stereotyped target, dull and stereotyped target bottom surface is equipped with the target stand subassembly of monogamy, dull and stereotyped target and target stand for the subassembly fastener closely laminate and be connected, the target stand subassembly is by cooling water course member and magnetic circuit member upper and lower range upon range of component, cooling water course member is for the flat cooling water course including cooling water course metal upper cover sheet metal and cooling water course metal soleplate and be equipped with into, the delivery port, the magnetic circuit component comprises on a target stand bottom plate the vertical range of the homopolar syntropy of a plurality of small circle cylindricality magnets (the same magnetic pole orientation is the same) that the magnetic pole is upper and lower terminal surface respectively. The utility model has the advantages of as follows: the area greatly increased that discharges, it increases the times target current to permit, is favorable to increasing substantially deposition rate, the dispersion arc discharge almost discharge on whole target surface, and it is more even to make the target surface ablate, improves the target utilization ratio, be favorable to target surface heat conduction and water -cooling to take away the heat, be favorable to improving the rete quality.
Description
Technical field
The utility model relates to a kind of vacuum cathode arc source, especially relate to a kind of when can make electric discharge arc spot be abound with the vacuum cathode arc source of target surface.
Background technology
Vacuum cathodic are deposition is one of ion film plating mainstream technology preparing tool and mould hard coating and ornamental protective membrane at present, due to Vacuum cathodic are deposition, to have ionization level high, particle energy is large, film/base bonding force is good, sedimentation velocity is fast, can depositing metallic films, alloy film, also plating synthesizing nitride can be reacted, carbide, oxide compound, carbonitride, the multiple film systems such as DLC, and target position can the advantage such as arbitrary disposition, tool and mould hard coating deposition applications comes into one's own especially, all technically carry out extensive work at exploitation vacuum cathode arc both at home and abroad, wherein core technology is exactly structure and the Magnetic Field Design of cathode arc source, its objective is that improving electric arc sinks speed, reduce macrobead quantity, improve quality of coating and target utilization.
Vacuum cathode arc is under vacuo, and target produces the process that target plasma body is launched in arc discharge.Cathodic discharge district is cluster electric arc spot, cathodic arc spot area is 100 ~ 200um, there are several differential of the arcs (about 10) in an arc spot, each differential of the arc spot is about 10 ~ 30um, to be separated by between the differential of the arc spot distance of 1 ~ self yardstick several, differential of the arc spot only has the life-span of 1 ~ 5us, in lifetime, more stable, change hardly, when differential of the arc spot is at main combustion period or after extinguishing, new differential of the arc spot in arc spot inside or can produce in its edge district. and cathodic arc spot makes hopping at cathode surface; The differential of the arc on cathodic metal target has very high current density-Da 104 ~ 108A/cm
2, there is very high power density (10
16w/m
2), arc spot is strong electron-emitting area; Meanwhile, often about launch ten electronics and also launch an atoms metal, to launch metal vapors up to about 1000m/s speed, the molten metal that evaporative air is at a high speed entrained with in slightly soluble pond is ejected into front space.Namely cathodic arc spot is the emissive source of electronics, metal ion, metal vapors and molten drop.
The visual vacuum cathode arc of people encloses at negative electrode (target) surface presentation one circle the bright line glittered, it is by one or more discontinuous electric arc bright patches, generate-extinguish-be shifted again and generate-extinguish the arc spot track that a series of Fast Process manifests, people's eyes illusion thinks that picture arc spot is in the path of motion continuously by mistake, and it is that a series of electric arc is given birth to, gone out, the process of hop in fact.People's research summary vacuum arc discharge feature and spots moving rule: " voltage minimum " principle of (1) arc-over, i.e. the cathodic arc discharge path that can automatically select arc voltage minimum; (2) magnetic field and arc spot interact, mainly contain two aspects: 1, " setback ": in Low current vacuum arc, under the magnetic field (B) being parallel to cathode surface, the direction of motion of arc spot is perpendicular to B, and contrary with electric current force direction, namely deviate from Ampere's law direction motion (namely moving with Lorentz Force reverse direction); 2, " acute angle principle ": when magnetic field and cathode surface oblique, cathodic arc spot departs from certain angular movement acutangulating direction to magnetic field and cathode plane again perpendicular to B//max direction, namely in reversing motion, also superpose a drift motion, magnetic line of force and the acute angular areas folded by cathode surface are pointed in the direction of drift motion.The transition direction of (see accompanying drawing 1) above spot arc motion and the characteristics of motion become the important evidence of cathode arc source design.
The commercial power arc source of prior art mainly adopts the motion of Magnetic control electric arc spot, the Magnetic Field Design principal mode of its cathode arc source forms arch magnetic field at cathode surface, (as shown in Figure 2) according to reversing motion principle and acute angle rule, the maximum place of corresponding magnetic field parallel component is tended at the cathode surface spots moving that powers on, namely, in the hole, Falling road that tropism is formed to arch form field, below vault correspondence, drive spots moving also the fastest.The arc source of prior art has small circular, planar rectangular, column three kinds of forms, its magnet used has permanent magnet, has electro-magnet, also has permanent magnet to be combined with electro-magnet, all Magnetic Field Design are all form arch form magnetic line of force, allow it pass Ba Mian And and allow arch be in the front of target surface.
Arch form magnetic line of force and target surface are as forming Tunnel, and the electric arc spot controlled all concentrates in hole, arch Falling road and moves, and the probability that arc spot appears at below vault is the highest.Target surface can be seen like this and present very dazzling tiny flicker arc spot line, target surface ablation is also concentrated on this movement locus.Someone adopts variation electro-magnet magneticstrength and permanent magnet combination, or adopt two Optimizing designs of variable magnetic field Strong degree, the relative variability of two groups of magnetic line of force arches, synthesize an arch constantly changed, drive arc spot expands transverse movement scope with vault transversal displacement, allows target surface ablated area expand trend evenly.
The arc source discharge characteristic of prior art belongs to discrete electric arc discharge, and arc spot all limits to concentrate in tiny Hu Banxian district and carries out strong electric discharge; Relatively whole target area, very little very little at the area with arc spot electric discharge in a flash, its shortcoming is: (1), even if adopt combination field expand spots moving scope but improve limited, ablated area is still more concentrated, and target utilization is low; (2) although arc macular area current density is very high, total machining area is limited, and total discharging current is restricted, thus sedimentation rate is restricted; (3) simultaneously, Ban Hu district area is little, power concentration, and Heating temperature is high, and cause arc spot place micro-molten bath area relatively large, liquation is more, when metallic vapor fiercely evaporates, still can be entrained with more and larger drop impelling to space.
Utility model content
Technical problem to be solved in the utility model, just be to provide the vacuum cathode arc source that a kind of arc spot is abound with target surface, can make the whole cathode target surface of arc discharge cloth Full, machining area increases greatly, allow to increase several times target current, be conducive to increasing substantially sedimentation rate; Adopt dispersion arc-over replace discrete arc discharge mode, arc spot is not limited in some certain tracks, and almost discharges on whole target surface, make target surface ablation evenly, improve target utilization; Reduce the quantity and size of launching drop, be conducive to improving film quality.
Solve the problems of the technologies described above, the utility model adopts following technical scheme:
Arc spot is abound with a vacuum cathode arc source for target surface, comprises a dull and stereotyped target, it is characterized in that: described dull and stereotyped target bottom surface is provided with the backing plate assemblies of a correspondence, and described dull and stereotyped target and backing plate assemblies fit tightly with fastening piece and be connected; Described backing plate assemblies is made up of cooling water channel component and magnetic circuit component stacked on top of one another; Described cooling water channel component be comprise cooling water channel metal top cover thin plate and cooling water channel metal base plate flat cooling water channel and be provided with entery and delivery port; Multiple small cylindrical magnet homopolarities that described magnetic circuit component is respectively upper and lower end face by magnetic pole in the same way (same pole is towards identical) are vertically arranged on a target stand base plate and form.
Described target stand base plate is magnetic conduction armature, and small cylindrical magnet is fixing by own magnetic force and the attracting location of magnetic conduction armature.
The diameter of described small cylindrical magnet is 5-6mm, arrangement mode for arrange arrangement more, spacing with row's adjacent column shape magnet is equal and spacing is 12-18mm, and spacing is between row and row 12-18mm, the half pitch but stagger mutually in the position of adjacent two row's cylindrical magnets.
Described dull and stereotyped target is rectangle or circle.
Described small cylindrical magnet is that NdFeB material is made.
Described cooling water channel metal top cover thin plate, cooling water channel metal base plate are made by red copper.
Compared with prior art, the utility model tool has the following advantages:
(1) the whole cathode target surface of arc discharge Bu Full, machining area increases greatly, and allowing increases several times target current, is conducive to increasing substantially sedimentation rate;
(2) disperse arc-over, arc spot is not limited in some certain tracks, and almost discharges on whole target surface, make target surface ablation evenly, improve target utilization;
(3) discharge on almost whole target surface, machining area increases, and is conducive to target surface heat conduction and water-cooled with walks heat, be conducive to reducing point of discharge target surface temperature, the few point of discharge micro-molten bath area of You Li Yu Minus and liquation amount, reduce the quantity and size of launching drop, be conducive to improving film quality.
Accompanying drawing explanation
" acute angle principle " schematic diagram of Fig. 1 electricity spots moving;
Fig. 2 is the electric spots moving schematic diagram of arch magnetic line of force;
Fig. 3 is structure sectional view of the present utility model;
Fig. 4 is small cylindrical magnet distribution schematic diagram of the present utility model;
Fig. 5 is magnet magnetic line of force schematic diagram of the present utility model;
Fig. 6 is magnetic line of force perspective view on target surface of the present utility model.
In figure: 1-target, 2-cooling water channel metal top cover thin plate, 3-flat cooling water channel, 4-cooling water channel metal base plate, 5-small cylindrical magnet, 6-target stand base plate, 7-backing plate assemblies, 8-magnetic line of force projects.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.
As shown in Figure 3, a kind of arc spot is abound with the vacuum cathode arc source of target surface electric discharge, comprise a rectangular dull and stereotyped target 1, the bottom surface of dull and stereotyped target 1 is provided with a backing plate assemblies 7, dull and stereotyped target 1 and backing plate assemblies 7 fit tightly with fastening piece and are connected, in actual use, electrical isolation is kept between dull and stereotyped target 1 and backing plate assemblies 7; Backing plate assemblies 7 is made up of cooling water channel assembly and magnetic circuit component stacked on top of one another; Cooling water channel assembly be comprise cooling water channel metal top cover thin plate 2 and cooling water channel metal base plate 4 flat cooling water channel 3 and be provided with entery and delivery port, cooling water channel metal top cover thin plate, cooling water channel metal base plate are made by red copper; Multiple small cylindrical magnet 5 homopolarities that magnetic circuit component is respectively upper and lower end face by magnetic pole in the same way (same pole is towards identical) are vertically arranged on a target stand base plate 6 and form; Target stand base plate 6 is magnetic conduction armature, and small cylindrical magnet is fixing by own magnetic force and the attracting location of magnetic conduction armature; The diameter of small cylindrical magnet is 5 ~ 6mm, arrangement mode for arrange arrangement more, spacing with row's adjacent column shape magnet is equal and spacing is 12-18mm, and spacing is between row and row 12-18mm, the half pitch but stagger mutually in the position of adjacent two row's cylindrical magnets.
As shown in Figure 3,4, water coolant is passed in use to water-in, cooling water channel metal top cover thin plate is very thin, be subject to cooling water pressure and push it against the dull and stereotyped back side of target, drain interbedded air, i.e. cooling water channel metal top cover thin plate and target back side gross area abutting contact, with transmission method heat transfer, there is best heat-conducting effect, the water coolant of elevated pressures flows through the stenosed section of flat cooling water channel, greatly improve flow velocity, be conducive to the heat that with walks target generation, this is for allowing that increasing flame current creates conditions.Then the power supply of cathode arc source is connected, electric arc target is in negative pole current potential, start the arcing device (not marking) that ignites, the ignite positive potential striking pin of arcing device is allowed to clash into cathode arc target surface, make its instantaneous short circuit thus the electric arc that ignites, pull open striking pin immediately, cathode arc source can carry out self-holding arc discharge.As shown in Figure 5,6, because below electric arc target surface, solid matter small column magnet, the upper magnetic line of each small column magnet poles end face forms a ring-type arch form pattern, so on electric arc target surface the magnetic line of force projection 8 of corresponding each small column magnet as the chrysanthemum, the ring-type arch form magnetic line of force Mi Pai Full cloth of numerous chrysanthemum shape is on target surface, the arc spot of arc discharge is subject to the control of ring-type arch type magnetic field, because magnetic field levels component is enough large, electric arc spot does rapid transition, rotary motion around each magnet axis.Now target current can be increased, occur simultaneously mutually because each ring-type arch type magnetic field gathers, spots moving that adjacent magnets controls can be driven to alter row mutually, the discrete discharge mode of electric arc finally causing former each magnet to control is transformed into the electric arc dispersion discharge mode that each magnet jointly controls, non-ly concentrate on limited spots moving bright line region and carry out arc discharge, but all carry out arc discharge everywhere at whole electric arc target surface, the whole cathode target surface of arc discharge Bu Full, machining area increases greatly, allows increase several times target current and be conducive to increasing substantially sedimentation rate simultaneously; Distributing arc-over, makes arc spot not be limited in some certain tracks, and almost discharges on whole target surface, make target surface ablation evenly, improve target utilization; Electric arc discharges on almost whole target surface, machining area increases, be conducive to target surface dispersion hot zone and improve water cooling effect, be conducive to water coolant with and walk heat, be conducive to the target surface temperature reducing point of discharge, the few point of discharge micro-molten bath area of You Li Yu Minus and liquation amount, reduce the quantity and size of launching drop, be conducive to improving film quality.Practice confirms: the target current that the cathode arc source of rectangular planes disperses the target current score of discharge mode to stand up power mode can increase to more than 2 times, such as: for the plane cathode arc source that specification is 200mmx1600mm, the target stream of originally discrete discharge mode is 150A, and disperse the target current of discharge mode can increase to 400A, sedimentation rate improves 1 to 2 times, also has coating macroscopic particles refinement and great Fu Minus is few, quality of coating significantly improves, target material surface ablation evenly, greatly improve target utilization.
Claims (6)
1. arc spot is abound with a vacuum cathode arc source for target surface, comprises a dull and stereotyped target, it is characterized in that: described dull and stereotyped target bottom surface is provided with the backing plate assemblies of a correspondence, and described dull and stereotyped target and backing plate assemblies fit tightly with fastening piece and be connected; Described backing plate assemblies is made up of cooling water channel component and magnetic circuit component stacked on top of one another; Described cooling water channel component be comprise cooling water channel metal top cover thin plate and cooling water channel metal base plate flat cooling water channel and be provided with entery and delivery port; Multiple small cylindrical magnet homopolarities that described magnetic circuit component is respectively upper and lower end face by magnetic pole are vertically arranged in the same way on a target stand base plate and form.
2. arc spot according to claim 1 is abound with the vacuum cathode arc source of target surface, it is characterized in that: described target stand base plate is magnetic conduction armature, and small cylindrical magnet is fixing by own magnetic force and the attracting location of magnetic conduction armature.
3. arc spot according to claim 2 is abound with the vacuum cathode arc source of target surface, it is characterized in that: the diameter of described small cylindrical magnet is 5-6mm, arrangement mode for arrange arrangement more, spacing with row's adjacent column shape magnet is equal and spacing is 12-18mm, spacing is between row and row 12-18mm, the half pitch but stagger mutually in the position of adjacent two row's cylindrical magnets.
4. arc spot according to claim 1 is abound with the vacuum cathode arc source of target surface, it is characterized in that: described dull and stereotyped target is rectangle or circle.
5. arc spot according to claim 1 is abound with the vacuum cathode arc source of target surface, it is characterized in that: described small cylindrical magnet is that NdFeB material is made.
6. arc spot according to claim 1 is abound with the vacuum cathode arc source of target surface, it is characterized in that: described cooling water channel metal top cover thin plate, cooling water channel metal base plate are made by red copper.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520554132.9U CN204825032U (en) | 2015-07-28 | 2015-07-28 | Arc spot that discharges is abound with vacuum cathode arc source of target surface |
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| CN201520554132.9U CN204825032U (en) | 2015-07-28 | 2015-07-28 | Arc spot that discharges is abound with vacuum cathode arc source of target surface |
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| CN204825032U true CN204825032U (en) | 2015-12-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105039915A (en) * | 2015-07-28 | 2015-11-11 | 东莞市汇成真空科技有限公司 | Vacuum cathode electric arc source with target surface besprinkled with discharging arc spots |
| CN107400862A (en) * | 2017-09-20 | 2017-11-28 | 武汉华星光电技术有限公司 | Target fixing device and target fixing means |
| CN108588650A (en) * | 2018-04-26 | 2018-09-28 | 航天材料及工艺研究所 | A kind of method of vacuum cathode arc arc source device and depositing coating |
-
2015
- 2015-07-28 CN CN201520554132.9U patent/CN204825032U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105039915A (en) * | 2015-07-28 | 2015-11-11 | 东莞市汇成真空科技有限公司 | Vacuum cathode electric arc source with target surface besprinkled with discharging arc spots |
| CN105039915B (en) * | 2015-07-28 | 2018-01-05 | 东莞市汇成真空科技有限公司 | A kind of arc spot that discharges is abound with the vacuum cathode arc source of target surface |
| CN107400862A (en) * | 2017-09-20 | 2017-11-28 | 武汉华星光电技术有限公司 | Target fixing device and target fixing means |
| CN107400862B (en) * | 2017-09-20 | 2020-05-05 | 武汉华星光电技术有限公司 | Target fixing device and target fixing method |
| CN108588650A (en) * | 2018-04-26 | 2018-09-28 | 航天材料及工艺研究所 | A kind of method of vacuum cathode arc arc source device and depositing coating |
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Address after: No.2, Longyuan Road, Yanwu, Dalingshan Town, Dongguan City, Guangdong Province 523000 Patentee after: Guangdong Huicheng Vacuum Technology Co.,Ltd. Address before: 523838 Guangdong Province, Dongguan City Dalingshan Town Village fourth industrial zone. Patentee before: DONGGUAN HUICHENG VACUUM TECHNOLOGY Co.,Ltd. |