The online joint coating device of indium oxide tin glass with medium frequency reactive sputtering silicon-dioxide
Technical field
The utility model relates to vacuum coating technology, specifically, is the on-line coating device of a kind of tin indium oxide (ITO) transparent conducting glass.
Background technology
Tin indium oxide (ITO) transparent conducting glass is by ITO (Indium Tin Oxide, tin indium oxide) film, silicon-dioxide (SiO
2) film and ultrathin substrate glass composition.The ITO film is used for liquid-crystal display (LCD) as transparent conductive electrode.SiO
2Film is plated between ITO film and the substrate glass, as the blocking layer, prevents that the alkalimetal ion in the glass is diffused in the ITO film, influences its conductivity.
Industrial production ITO conductive glass generally adopts magnetron sputtering method, though the technology of magnetron sputtering method is ripe relatively, and domestic existing many ITO transparent conducting glass manufacturer.But still there are the following problems: 1, also there is technical difficulty in ultrathin substrate glass production aspect, can not produce, entirely by import; 2, can not be coated with SiO
2Film, or adopt radio-frequency sputtering technology, plated film efficient is low.SiO has been plated in the direct import of most of producers
2The substrate glass of film perhaps prepares SiO with radio-frequency sputtering on the import suite of equipment
2Film, cost improves greatly.And prepare SiO with traditional radio frequency
2There is following deficiency again in film: 1, need to use expensive import SiO
2Target, and sputtering yield is low; 2, radio-frequency sputtering power utilization ratio is low and heating is serious; 3, power supply and matching box price height, easy break-down.Radio-frequency sputtering still is not big area high rate deposition SiO
2The ideal scheme of film.
Use the two target response sputters of intermediate frequency and prepare SiO
2The technology of film has the high characteristics of sedimentation rate, but prepares SiO at reaction magnetocontrol sputtering
2Process in, in order to sputter Si atom and O from the Si target
2Chemical combination need charge into many O
2, O
2/ Ar is about 10%~20%, and in preparation ITO membrane process, only need pour minor amounts of oxygen (O
2), O
2/ A
2Be about 1%-5%.Like this, prepare SiO in the realization response sputter
2When film and the plating of ITO film connection, just run into reactive sputtering SiO
2The reactant gases oxygen of coating chamber might float to the ITO coating chamber, thereby causes the problem to the ITO technogenic influence.
How to reduce SiO
2The production cost of film, and be not only China with the online plating of ITO film, and be the bottleneck difficult problem that faces of ITO industry in the world.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, reduces silicon-dioxide (SiO
2) production cost of film, realization response sputter silicon-dioxide (SiO
2) the online plating of film and tin indium oxide (ITO) film.
Realize the technical scheme of above-mentioned purpose: a kind of online joint coating device of indium oxide tin glass with medium frequency reactive sputtering silicon-dioxide, be docile and obedient preface and be connected with front end transition vacuum chamber, intermediate frequency reaction magnetocontrol sputtering SiO
2Coating chamber, gas barrier device, ITO coating chamber and rear end transition vacuum chamber, front and back ends transition vacuum chamber and ITO coating chamber are connected to off-gas pump respectively, the gas barrier device is made up of insulated chamber and off-gas pump, and insulated chamber connects off-gas pump, and the front end of insulated chamber connects intermediate frequency reaction magnetocontrol sputtering SiO
2Coating chamber, the rear end of insulated chamber connects the ITO coating chamber.
The gas barrier device is made up of two insulated chambers that communicate, molecular pump and diffusion pump, connects intermediate frequency reaction magnetocontrol sputtering SiO
2The insulated chamber of coating chamber is connected to molecular pump, and the insulated chamber that links to each other with the ITO coating chamber connects diffusion pump, and the ITO coating chamber connects molecular pump.
Intermediate frequency reaction magnetocontrol sputtering SiO
2Be provided with the two target reaction magnetocontrol sputterings of intermediate frequency in the coating chamber and prepare SiO
2Film device, the two target reaction magnetocontrol sputterings of intermediate frequency prepare SiO
2Film device comprises two targets, reactant gases steam line, working gas steam line, intermediate frequency power supply, piezo electric valve controller and piezo electric valve, two targets are contained in the shielding case, the indoor reactant gases steam line of vacuum plating is positioned on the symmetrical center line of two targets, two output terminals of intermediate frequency power supply are respectively received on the target, the control line of intermediate frequency power supply connects the piezo electric valve controller, the piezo electric valve on the output control reactant gases steam line of piezo electric valve controller.
Adopt technique scheme, the utility model otherwise effective technique effect is: 1, pass through at silicon-dioxide (SiO
2) two insulated chambers are set between coating chamber and tin indium oxide (ITO) coating chamber, and bleed by molecular pump and diffusion pump, reduce dexterously even isolated the SiO that is communicated with
2The influencing each other of different atmosphere between coating chamber and the ITO coating chamber keeps the working order that requires separately as much as possible, realized silicon-dioxide (SiO
2) the online plating of film and tin indium oxide (ITO) film.2, the two target reaction magnetocontrol sputterings of intermediate frequency are prepared SiO
2Film device is used for the ito glass production unit, utilizes the two target reaction magnetocontrol sputterings of intermediate frequency to prepare SiO
2Film has low etc. the advantage of speed height, cost, has improved the output and the quality of product, has reduced production cost.
Description of drawings
Fig. 1 is a kind of online plating dress of indium oxide tin glass with medium frequency reactive sputtering silicon-dioxide
The structural representation of putting.
Fig. 2 is that the two target reaction magnetocontrol sputterings of a kind of intermediate frequency prepare SiO
2The film device structural representation.
Embodiment
See figures.1.and.2, a kind of online joint coating device of indium oxide tin glass with medium frequency reactive sputtering silicon-dioxide comprises transition vacuum chamber (1,9), SiO
2Coating chamber 3, gas barrier device 4, ITO coating chamber 10, three diffusion pump (2,6,8) and two molecular pumps (5,7), wherein, transition vacuum chamber 1 connects diffusion pump 2 and bleeds, at SiO
2The two target reaction magnetocontrol sputterings of intermediate frequency shown in Figure 2 are set in the coating chamber 3 prepare SiO
2Film device, gas barrier device 4 is made up of insulated chamber (11,12), molecular pump 5 and diffusion pump 6, and insulated chamber 12 connects diffusion pump 5 and bleeds, and insulated chamber 11 connects diffusion pump 6 and bleeds, and what confession ITO coating chamber 10 was bled is molecular pump 7, transition vacuum chamber 9 connects diffusion pump 8 and bleeds.
The two target reaction magnetocontrol sputterings of the intermediate frequency that is provided with in the vacuum film coating chamber 3 prepare SiO
2Film device, comprise two targets 20, intermediate frequency power supply 13, piezo electric valve controller 14, piezo electric valve 15, reactant gases (oxygen) steam line 16, working gas (argon) steam line 17, shielding case 18 and substrate frame 19, reactant gases steam line 26 in vacuum film coating chamber 21 is positioned on the symmetrical center line of two targets 20, oxygen blows on the substrate on the substrate frame 19 uniformly and stably, two targets 20 are contained in the same shielding case 8, two output terminals of intermediate frequency power supply 13 (PEII type) respectively connect a target 20, the control line of intermediate frequency power supply 13 connects piezo electric valve controller 14 (PCU-01 process control unit), the opening degree of piezo electric valve 5 on piezo electric valve controller 14 control reactant gases (oxygen) steam lines 16.Working process: the substrate frame that is loaded with substrate glass enters coating chamber 3 by former process through transition chamber 1, in coating chamber 3, prepares SiO through the two target reaction magnetocontrol sputterings of intermediate frequency
2Film device plates the thick SiO of 20-30nm at its glass substrate surface
2Film.When accidental cause influences the working order of target 20, the voltage and current of target 20 changes, this variation detects and is sent to piezo electric valve controller 14 by intermediate frequency power supply 13, piezo electric valve controller 14 is through amplifying and phase identification, adjust the operating voltage of piezo electric valve 15, change oxygen flow, make target 2 return to original working order, realize closed-loop control.SiO
2Behind the plated film, enter ITO coating chamber 10, in ITO coating chamber 10, be coated with SiO through gas barrier chamber 4
2Above the substrate glass of film, plate the ITO nesa coating of one deck 25nm left and right thickness again, enter following chamber through transition chamber 9 at last.
The utility model has been isolated SiO by gas barrier chamber 4
2The influencing each other of different process atmosphere between coating chamber 3 and the ITO coating chamber 10, the two target reaction magnetocontrol sputterings of intermediate frequency prepare SiO
2Film has low etc. the advantage of speed height, cost, has improved the output and the quality of product, has reduced production cost.