CN100550266C - A kind of field transmitting display apparatus grid plate based on metal substrate and its production and application - Google Patents
A kind of field transmitting display apparatus grid plate based on metal substrate and its production and application Download PDFInfo
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- CN100550266C CN100550266C CNB2007100288324A CN200710028832A CN100550266C CN 100550266 C CN100550266 C CN 100550266C CN B2007100288324 A CNB2007100288324 A CN B2007100288324A CN 200710028832 A CN200710028832 A CN 200710028832A CN 100550266 C CN100550266 C CN 100550266C
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Abstract
The invention discloses a kind of field transmitting display apparatus grid plate based on metal substrate and its production and application.The present invention adopts metal material as grid substrate, and combination film and thick-film technique prepare the FED grid board.This method mainly comprises following processing step: at first, make grid hole array on metal substrate, and substrate surface is carried out surface finish handle; On substrate, prepare thin dielectric film and insulating thick film layer then respectively; At last, utilize preparation gate metal electrode strip on insulating barrier.Grid board based on metal substrate of the present invention is applicable to large tracts of land high-resolution Field Emission Display.
Description
Technical field
The present invention relates to a kind of preparation method of the field transmitting display apparatus grid plate based on metal substrate, belong to flat-panel monitor manufacturing technology field.
Background technology
(Field Emission Display FED) is the flat-panel monitor that a kind of display performance and CRT compare favourably to Field Emission Display.The FED of separate structure assembles then because each assembly of device can separate machined, and rate of finished products height, cost are low, satisfies the requirement of commercialization and is subjected to adopting of many companies and research unit.At present, the grid board of separate structure FED adopts glass or ceramic material as substrate usually, processes direct preparation metal electrode behind the grid hole in the above.Yet, adopt glass or ceramic material to be as the shortcoming of FED grid substrate, glass or ceramic material are frangible, difficult processing, this causes the processing cost of this type of material very high, and is difficult to be applied on large tracts of land, the high-resolution FED display device.Therefore prepare a kind of processing cost low, can be used for large tracts of land, high-resolution FED grid board is the key of separate structure FED industrialization.
Summary of the invention
The purpose of this invention is to provide a kind of FED grid board based on metal substrate and preparation method thereof.
Feature of the present invention is to adopt metal material as grid substrate, utilizes technologies such as plasma-reinforced chemical deposition, silk screen printing, evaporation coating and photoetching, makes the grid board that can be applicable to separate structure FED.Specific as follows:
First aspect of the present invention is a kind of separate structure FED grid board based on metal substrate, it is characterized in that: described grid board is substrate with the metallic plate, have the grid hole array that connects substrate on the substrate, all cover insulating barrier in the upper and lower surface of metal substrate and the hole wall of grid hole, preparation has metal gate electrode on the upper and lower surface insulation layer of metal substrate.
Described metal gate electrode is a strip shaped electric poles.
Described metal gate electrode is arranged at by the grid hole, be arranged in parallel with the length or the Width of grid hole array.
Further, above-mentioned insulating barrier is made up of the film-insulated transition zone and the outer field insulating thick film layer of internal layer; The thickness of film-insulated transition zone is 0.2～2 μ m, and material is silicon dioxide, silicon nitride or aluminium oxide.Thin dielectric film the adhesive force that can improve between gate insulator and metal substrate is set.
Second aspect of the present invention is a kind of preparation method of the separate structure FED grid board based on metal substrate, and its preparation technology's flow process is as follows:
(1) on metal substrate, makes grid hole array;
(2) polishing metal substrate makes smooth surface and makes the pattern of grid hole edge camber transition;
(3) method of utilizing silk screen printing prepares the insulating thick film layer at two surfaces up and down and the grid hole wall of substrate;
(4) on the upper and lower surface insulation layer of metal substrate, prepare metal gate electrode.
Above-mentioned method before preparation insulating thick film layer, deposits thin film insulation transition zone earlier on substrate, the thickness of this transition zone is 0.2～2 μ m, and material is silicon dioxide, silicon nitride or aluminium oxide.
Adopt the mode of silk screen printing to print the insulating thick film layer at two faces of substrate and grid hole wall: the thickness of insulating thick film layer is 10 microns.
Metal gate electrode can adopt photoetching process at the surface preparation metal gate electrode figure of insulating barrier and form.
Metal gate electrode also can adopt physical vaporous deposition to prepare on insulating barrier; The deposition process of metal gate electrode can be alternate manners such as electron-beam vapor deposition method, resistance heating evaporation method or magnetron sputtering method; The metal gate electrode material that is deposited can be aluminium, chromium.
The 3rd aspect of the present invention is the above-mentioned application of separate structure FED grid board on field emission display based on metal substrate.
The present invention adopts metal material as the substrate material, has solved material brittle effectively, the problem that difficult processing, processing cost are very high.The above-mentioned separate structure FED grid board based on metal substrate can be applicable to be specially adapted to large tracts of land, high-resolution display on the separate structure FED device of different area, different resolution.
Description of drawings
Fig. 1 is based on preparation technology's flow process of the discrete FED grid board of metal substrate.
Fig. 2 is based on preparation technology's flow diagram of the discrete FED grid board of metal substrate.
The schematic diagram of a kind of discrete FED grid board based on metal substrate of Fig. 3.72 * 32 grid hole arrays 302 on this substrate 301, have been made.
The whole photo of grid board after Fig. 4 a finishes.
The local electromicroscopic photograph that amplifies of grid board after Fig. 4 b finishes.
The voltage endurance curve of the gate insulator of Fig. 5 grid board.
Fig. 6 adopts the structural representation of separate gate substrate manufacture FED.Wherein, 601 is phosphor screen, and 602 is slider, and 603 is metal substrate, and 604 is insulating barrier, and 605 is slider, and 606 is the carbon nano-tube cold cathode, and 607 is the gate electrode bar, and 608 is cathode substrate.
Fig. 7 shows situation based on the surface sweeping of the FED that the separate gate plate of metal substrate is made.
Embodiment
In order to be illustrated more clearly in preparation method, specify manufacture craft flow process and related key issue processing mode thereof below based on the discrete FED grid board of metal substrate.
The manufacture craft flow process as shown in Figure 1.Concrete process schematic representation as shown in Figure 2.The parent material of metal gate pole plate 1 is a metal sheet, available stainless steel or other metal, and thickness can be 50 microns to 2 millimeters scopes.
Shown in the b of Fig. 2, adopt the method for photoetching corrosion or machining on metallic plate, to make grid hole 2.After making grid hole, substrate is carried out polishing, improve the evenness on the surface of substrate, and the sharp projection at removal grid hole edge, make the limit, hole form arc pattern 3 (shown in the c of Fig. 2), the Electric Field Distribution with the insulating barrier inside of improving subsequent preparation improves withstand voltage.
Substrate is through after cleaning, on two surfaces of substrate all deposit film insulation transition zone 4 as transition zone (shown in the d of Fig. 2).Film-insulated buffer layer material is silicon dioxide, silicon nitride or aluminium oxide etc.Thickness is 0.2 micron to 2 microns.The preparation method can adopt the method for chemical vapour deposition (CVD) (PECVD), physical evaporation or spin coating.In the preparation process of film-insulated transition zone, the thickness of insulating layer of two faces of metal substrate need keep equating or be close.
Shown in the e of Fig. 2, adopt the mode of silk screen printing to print insulating thick film layer 5 in substrate upper and lower surfaces and grid hole wall.According to the withstand voltage requirement of device to grid board, the thickness of insulating thick film layer can be at 10 microns, and for the suffered stress that produces from insulating barrier in balancing substrate two sides, the insulating thick film layer thickness of two faces of metal substrate need keep equating or be close.
After the insulating barrier preparation is finished, on insulating barrier, prepare gate metal electrode strip 6 (shown in the e of accompanying drawing 2) by photoetching technique.The gate metal electrode strip adopts physical vapour deposition (PVD), prepares as the mode of thermal evaporation, magnetron sputtering or electron beam evaporation.The electrode strip figure can be used lift-off technology (lift-off) commonly used in the photoetching and make, or direct etching behind the employing litho pattern.According to the needs of device architecture, the gate electrode bar can be made in the single face or the two sides of substrate.
Above-mentioned separate structure FED grid board based on metal substrate can be assembled with negative electrode panel and the anode plate of FED, produces the FED device.
Embodiment:
This example has provided the preparation method of metal gate pole plate of FED device of 2 inches separate structure, and the resolution of grid board is 72 * 32 (72 * 32 grid hole arrays), and its specification as shown in Figure 3.The size of each grid hole is about 200 microns * 600 microns.
It is grid substrate that present embodiment is chosen No. 304 stainless steels, and substrate thickness is 150 μ m.The technological process and the schematic diagram that utilize Fig. 1 and 2 to provide are made grid board.At first on stainless steel metal substrate 1, process the array of grid hole 2 with the method for chemical corrosion.Adopt electrochemical polish to make stainless smooth surface then and make the pattern 3 of the curved transition of grid bore edges, shown in the c of Fig. 2.
After the grid substrate process acetone that processes, the alcohol wash, deposit the SiO that thickness is about 0.5 μ m at the upper and lower surface and the grid hole hole wall of substrate with plasma enhanced chemical vapor deposition (PECVD)
2 Film 4 is as film-insulated transition zone.
With the method for silk screen printing two surface preparation insulating thick film layers 5, and carry out sintering in grid substrate.In the present embodiment, the main component of insulating thick film layer is aluminium oxide or silica.The thickness of prepared insulating thick film layer is about 20～30 μ m.Insulating thick film layer 5 is the upper and lower surface and the grid hole hole wall of covered substrate simultaneously.
Last applying electronic beam evaporation evaporation metal aluminium electrode, and on insulating barrier, prepare gate electrode figure 6 with photoetching process, thickness of electrode is about 250nm.Metal gate electrode is arranged on the next door of grid hole, and is parallel with the length direction or the Width of grid hole array.
Prepared grid board profile pattern as shown in Figure 4.Fig. 4 (a) is whole photo, and Fig. 4 (b) is the local electron scanning micrograph that amplifies.The grid board insulating barrier that adopts the present invention to make has voltage endurance preferably.3 * 10
-3The voltage endurance of the gate insulator of test preparation in the vacuum of Pa, the result shows that insulating barrier can bear the above direct voltage of 1200V as shown in Figure 5.
Adopt this grid substrate to be assembled into Field Emission Display with anode phosphor screen and cathode base.Fig. 6 is the structure chart that adopts the FED of metal substrate grid board.Fig. 7 is the display image that this FED device obtains when single file scans.The above results shows utilizes the grid board of the inventive method preparation can be used for large tracts of land high-resolution FED device.
Claims (10)
1, a kind of separate structure FED grid board based on metal substrate, it is characterized in that: described grid board is substrate with the metallic plate, have the grid hole array that connects substrate on the substrate, all cover insulating barrier in the upper and lower surface of metal substrate and the hole wall of grid hole, preparation has metal gate electrode on metal substrate upper surface or the lower surface insulating barrier.
2, by the described separate structure FED grid board based on metal substrate of claim 1, it is characterized in that: described metal gate electrode is a strip shaped electric poles.
3, by the described separate structure FED grid board based on metal substrate of claim 2, it is characterized in that: described metal gate electrode is arranged at by the grid hole, be arranged in parallel with the length or the Width of grid hole array.
4, by the described separate structure FED grid board based on metal substrate of claim 1, it is characterized in that: described insulating barrier is made up of the film-insulated transition zone and the outer field insulating thick film layer of internal layer; The thickness of film-insulated transition zone is 0.2～2 μ m, and material is silicon dioxide, silicon nitride or aluminium oxide.
5, a kind of preparation method of the separate structure FED grid board based on metal substrate, its preparation technology's flow process is as follows:
(1) on metal substrate, makes grid hole array;
(2) polishing metal substrate makes smooth surface and makes the pattern of grid hole edge camber transition;
(3) method of utilizing silk screen printing prepares the insulating thick film layer at two surfaces up and down and the grid hole wall of substrate;
(4) preparing metal gate electrode on the metal substrate or on the lower surface insulating barrier.
6, the preparation method of FED grid board as claimed in claim 5, it is characterized in that: before preparation insulating thick film layer, deposit thin film insulation transition zone earlier on substrate, the thickness of this transition zone is 0.2～2 μ m, and material is silicon dioxide, silicon nitride or aluminium oxide.
7, the preparation method of FED grid board as claimed in claim 5 is characterized in that: the thickness of described insulating thick film layer is 10 microns.
8, the preparation method of FED grid board as claimed in claim 5 is characterized in that: adopt the surface preparation metal gate electrode figure of photoetching process at insulating barrier.
9, the preparation method of FED grid board as claimed in claim 5 is characterized in that: adopt physical vaporous deposition to prepare metal gate electrode on insulating barrier; Described sedimentation is electron-beam vapor deposition method, resistance heating evaporation method or magnetron sputtering method; The metal gate electrode material that is deposited is aluminium, chromium.
10, each described separate structure FED grid board application on field emission display of claim 1 to 4 based on metal substrate.
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| CNB2007100288324A CN100550266C (en) | 2007-06-26 | 2007-06-26 | A kind of field transmitting display apparatus grid plate based on metal substrate and its production and application |
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| CNB2007100288324A CN100550266C (en) | 2007-06-26 | 2007-06-26 | A kind of field transmitting display apparatus grid plate based on metal substrate and its production and application |
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| CN100550266C true CN100550266C (en) | 2009-10-14 |
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| CN101908457B (en) * | 2010-08-27 | 2012-05-23 | 清华大学 | Metal grid mesh, field emission device and field emission display |
| TWI421894B (en) * | 2010-09-02 | 2014-01-01 | Hon Hai Prec Ind Co Ltd | Metal mesh, field emission device and field emission display |
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