CN102880340A - Single-layer externally hanging touch panel and manufacturing method thereof and liquid crystal display - Google Patents
Single-layer externally hanging touch panel and manufacturing method thereof and liquid crystal display Download PDFInfo
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- CN102880340A CN102880340A CN2012103110381A CN201210311038A CN102880340A CN 102880340 A CN102880340 A CN 102880340A CN 2012103110381 A CN2012103110381 A CN 2012103110381A CN 201210311038 A CN201210311038 A CN 201210311038A CN 102880340 A CN102880340 A CN 102880340A
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Abstract
The invention discloses a single-layer externally hanging touch panel and a manufacturing method thereof, and a liquid crystal display. The method comprises the following steps: forming a black matrix pattern (BM Pattern), which is positioned in a non-visual region of a screen on the surface of a substrate; forming a first film on the surface, on which the BM Pattern is formed, of the substrate, wherein the first film is made of transparent material and the baking temperature of the transparent material is lower than the lowest volatilization temperature of the material forming the BM Pattern; forming an isolating film and a spattering metal layer on the surface of the first film sequentially, wherein the isolating film is made of transparent conductive material and the transparent conductive material is not volatized at high temperature of the spattering metal layer; and etching the metal layer and the isolating film to form a metal pattern and an isolating pad respectively. The first film, the isolating film and the spattering metal layer are formed sequentially, so that a chamber of spattering equipment and the touch panel are not polluted.
Description
Technical field
The present invention relates to field of touch screen manufacturing, relate in particular to a kind of individual layer external hanging type touch-screen and preparation method thereof, liquid crystal display.
Background technology
At present, the touch screen technology development has developed into the common technology in touch-control field and the field of liquid crystal display rapidly gradually.Touch-screen can be divided into following three types according to structure: external hanging type touch-screen Add On Mode Touch Panel, externally embedded type touch-screen On Cell Touch Panel and embedded touch-screen In Cell Touch Panel, because the external hanging type touch screen performance is higher, cost is lower, therefore current in field of liquid crystal display, mostly adopt the external hanging type touch-screen.
Initial external hanging type touch-screen has the two-layer substrate structure, is respectively the outer cover-plate glass Cover Glass of protection screen effect and the touch pad glass Touch Panel Glass that internal layer plays the effect of perception touch point of plaing.Yet along with the develop rapidly of lcd technology, and the consumer is to the continuous demand of thinning display, designs to have the main target that high performance, cost, ultra-thin external hanging type touch-screen becomes all big enterprises gradually.Thereupon just produced individual layer external hanging type touch-screen Add On One Glass Touch Panel technology; its essence is that each function element that will be used for the effect of perception touch point is produced on cover-plate glass; so that whole touch-screen only comprises one deck cover-plate glass structure; this layer cover-plate glass both played the effect of protection screen, played again the effect of perception touch point.
Be illustrated in figure 1 as the structure of the individual layer external hanging type touch-screen of prior art making, comprise: cover-plate glass 101, BM Pattern (Black Matrix Pattern, black matrix pattern) 102, metal routing 103, metal bridge 104, insulation course 105, interrupted type ITO Trace (Indium-Tin Oxide Trace, the indium tin oxide cabling) 106, continuous type ITO Trace 107, the via hole (not shown in figure 1), protective seam PVX 109, pierced pattern 110, FPC (Flexible Printed Circuit, flexible printed circuit board) 111, the poor position 112 of first paragraph, the poor position 113 of second segment; Wherein, the whole screen area of individual layer external hanging type touch-screen is divided into viewing area (hereinafter to be referred as the screen viewing area) and non-viewing area (hereinafter to be referred as the non-viewing area of screen), the screen viewing area is used for showing, for transparent, and the non-viewing area of screen is not used in demonstration, for nontransparent; Cover-plate glass 101 is covered with whole screen area; BM Pattern 102 is the frame type pattern, be formed at the non-viewing area of screen on the cover-plate glass 101, be used for blocking the light of the non-viewing area of screen, the position, boundary that is positioned at screen viewing area and the non-viewing area of screen among the BM Pattern 102 has the poor position 112 of first paragraph of a slope shape; Metal routing 103 is formed on the BM Pattern 102, is used to interrupted type ITO Trace106 and continuous type ITO Trace107 that data-signal is provided; Metal bridge 104 is formed on the cover-plate glass 101, and is positioned at the screen viewing area, is made with metal routing 103; Insulation course 105 is formed on BM Pattern 102, metal routing 103, the metal bridge 104, often adopts the materials such as silicon nitride, silicon dioxide to make; The position that insulation course 105 is positioned at the screen viewing area has via hole, and the position, boundary that is positioned at screen viewing area and the non-viewing area of screen has the poor position 113 of second segment of a slope shape; Interrupted type ITO Trace 106 is along the first direction setting, ITO line segment by a plurality of separation consists of, each ITO line segment all contacts with metal bridge 104 by via hole, to realize the conducting of the interrupted type ITO Trace 106 of whole piece, interrupted type ITO Trace 106 extends to non-viewing area along the surface at the poor position 113 of second segment by the viewing area, and is connected with metal routing 103 in the non-viewing area; Continuous type ITO Trace 107 is along the second direction setting, consisted of by a whole piece ITO cabling, and continuous type ITO Trace 107 also extends to non-viewing area along the surface at the poor position 113 of second segment by the viewing area, is connected with metal routing 103 in the non-viewing area; Interrupted type ITO Trace 106 and continuous type ITO Trace 107 are arranged in a crossed manner, but each other insulation, interrupted type ITO Trace 106 and continuous type ITO Trace 107 1 are used from the transmission of data to determine the touch point; Protective seam 109 is formed on interrupted type ITO Trace 106, continuous type ITO Trace 107 and the insulation course 105, itself has certain hardness, plays the effect of the whole individual layer external hanging type touch-screen of protection; Have pierced pattern 110 on the protective seam 109, be used for exposing sub-fraction metal routing 103, so that metal routing 103 is connected on the flexible printed circuit board 111, provided the purpose of various data-signals as metal routing 103 by flexible printed circuit board 111 take realization.
Yet at present in technical field of liquid crystal display, the technological process of making individual layer external hanging type touch-screen has a lot of defectives, take making individual layer external hanging type touch-screen as shown in Figure 1 as the example explanation, has following defective:
1, by after the photoetching process formation BM Pattern 102, when continuation is made metal bridge 104 and metal routing 103 at the cover-plate glass 101 that is formed with BM Pattern 102, need the sputter layer of metal, because BM Pattern 102 adopts BM material (a kind of resin material that contains black colorant) to make, and the metal level of sputter is the high temperature material, high temperature can cause the volatilization of BM material, and then the BM material of volatilization can pollute chamber and the touch-screen itself of metal sputtering equipment;
2, BM Pattern 102 by photoetching process formation, the poor position 112 of first paragraph that has a slope shape at the position that is positioned at screen viewing area and the non-viewing area of screen, accordingly, the poor position 113 of second segment that also has slope shape on the insulation course 105, can form on the surface at the poor position 113 of this second segment interrupted type ITO Trace106 and continuous type ITO Trace107 in the subsequent technique, if the poor position of first paragraph 112 steepness that photoetching forms are excessive, then the steepness at the corresponding poor position 113 of second segment also can be larger, be easy to cause the interrupted type ITO Trace106 and the continuous type ITO Trace107 that form along its surface to produce broken string, and then cause corresponding data-transformation facility to be affected;
3, when the cover-plate glass 101 that is formed with BM Pattern 102 is made insulation course 105 by sputter one deck silicon nitride or earth silicon material, because silicon nitride or the earth silicon material temperature used are higher, also can cause the volatilization of BM material, and then cause the chamber of sputtering equipment and touch-screen itself to be polluted.Above various defective has brought more difficulty for the technological process of making individual layer external hanging type touch-screen in the present technical field of liquid crystal display.
Summary of the invention
The embodiment of the invention provides a kind of individual layer external hanging type touch-screen and preparation method thereof, liquid crystal display, makes the multiple difficulty that runs in the technological process of individual layer external hanging type touch-screen in order to overcome present field of liquid crystal display.
The present invention includes:
A kind of method for making of individual layer external hanging type touch-screen comprises:
Form the black matrix pattern BM Pattern that is positioned at the non-viewing area of screen at substrate surface;
Form the first rete at the substrate surface that is formed with BM Pattern, described the first rete adopts transparent material, and the baking temperature of this transparent material is lower than the minimum temperature that causes the material volatilization that consists of described BM Pattern;
Surface at described the first rete forms barrier film and metal level successively, and described barrier film adopts transparent conductive material, and described transparent conductive material is non-volatile under the high temperature of the described metal level of sputter;
Described metal level and barrier film are carried out etching processing, form respectively metal pattern and isolating pad.
A kind of individual layer external hanging type touch-screen comprises: substrate, black matrix pattern BM Pattern, the first rete, isolating pad, metal pattern; Wherein,
Described BM Pattern is formed on the described substrate surface, and is positioned at the non-viewing area of screen;
Described the first rete is formed on the substrate surface with described BM Pattern, is made of transparent material;
Described isolating pad is formed on described the first rete, is made of transparent conductive material;
Described metal pattern is formed on the described isolating pad.
A kind of liquid crystal display comprises: aforesaid individual layer external hanging type touch-screen.
Individual layer external hanging type touch-screen provided by the invention and preparation method thereof, after substrate forms BM Pattern, not direct splash-proofing sputtering metal layer, but form successively the first rete and barrier film, sputter forms metal level on barrier film again; Because the first rete can be isolated BM Pattern, and the formation of the first rete can not cause the volatilization of BM Pattern material, further, barrier film can be isolated the first rete, and barrier material can not volatilize under the high temperature of splash-proofing sputtering metal layer, therefore, in the technological process of making individual layer external hanging type touch-screen, just can avoid the chamber of sputtering equipment and the problem that touch-screen itself is polluted.
Description of drawings
Fig. 1 is individual layer external hanging type touch screen structure schematic diagram of the prior art;
Fig. 2 is the method for making schematic diagram of individual layer external hanging type touch-screen provided by the invention;
Fig. 3 (1) is the schematic diagram that forms BM Pattern 302 in the embodiment of the invention one;
Fig. 3 (2) is the schematic diagram that forms the first rete 304 in the embodiment of the invention one;
Fig. 3 (3) is the schematic diagram that forms barrier film 306 in the embodiment of the invention one;
Fig. 3 (4) is the schematic diagram that forms metal level 307 in the embodiment of the invention one;
Fig. 3 (5) is the schematic diagram that forms metal routing 308, metal bridge 309, isolating pad 310 in the embodiment of the invention one;
Fig. 3 (6) is the schematic diagram that forms the second rete 311 in the embodiment of the invention one;
Fig. 3 (7) is the schematic diagram that forms via hole 312, the first pierced pattern 313 in the embodiment of the invention one;
Fig. 3 (8) is the schematic diagram that forms interrupted type ITO cabling 314, continuous type ITO cabling 315 in the embodiment of the invention one;
Fig. 3 (9) is the schematic diagram that forms tertiary membrane layer 317 in the embodiment of the invention one;
Fig. 3 (10) is the schematic diagram that forms the second pierced pattern 318 in the embodiment of the invention one;
The schematic diagram of Fig. 3 (11) in the embodiment of the invention one metal routing 308 and flexible print circuit board 319 being coupled together;
The individual layer external hanging type touch screen structure schematic diagram that Fig. 4 provides for the embodiment of the invention two;
The liquid crystal display device structure schematic diagram that Fig. 5 provides for the embodiment of the invention three.
Embodiment
Below in conjunction with the drawings and specific embodiments, the embodiment of individual layer external hanging type touch-screen provided by the invention and preparation method thereof, liquid crystal display is described in further detail.
The invention provides a kind of method for making of individual layer external hanging type touch-screen, as shown in Figure 2, the method comprises the steps:
Step 21 forms the black matrix pattern BM Pattern that is positioned at the non-viewing area of screen at substrate surface;
Step 22 forms the first rete at the substrate surface that is formed with BM Pattern, and described the first rete adopts transparent material, and the baking temperature of this transparent material is lower than the minimum temperature of the material volatilization that causes described BM Pattern;
Step 23 forms barrier film and splash-proofing sputtering metal layer successively on the surface of described the first rete, and described barrier film adopts transparent conductive material, and described transparent conductive material is non-volatile under the high temperature of splash-proofing sputtering metal layer;
Step 24 is carried out etching processing to described metal level and barrier film, forms respectively metal pattern and isolating pad.
Among the present invention, described substrate consists of the medium of each functional unit in the described individual layer external hanging type touch-screen for carrying, and its material can be glass, quartz or resin type material etc.For example, when the individual layer external hanging type touch-screen of producing is used for common flat liquid crystal display, can adopt the substrate of glass or quartz material, when the individual layer external hanging type touch-screen of producing is used for crooked liquid crystal display, just can adopt the substrate of resin type material.Preferably, the substrate among the present invention adopts glass material.
Among the present invention, the whole screen surface of described individual layer external hanging type touch-screen is divided into viewing area and non-viewing area, and wherein the screen viewing area is used for showing, and the non-viewing area of screen is not used in demonstration.In order to adapt to user's visual demand, better, in the concrete manufacturing process, each functional unit that is formed at the screen viewing area has transparent attribute.
Among the present invention, described BM Pattern is used for blocking the light of the non-viewing area of screen, makes the user not observe each ingredient of the non-viewing area of screen.During implementation, can adopt the mode that forms BM Pattern in the prior art to form, for example, apply the resin type material (hereinafter to be referred as the BM material) that contains black colorant in basic surface, then utilize photoetching process, form the BM Pattern that is positioned at the non-viewing area of screen at substrate surface.
Among the present invention, described the first rete adopts transparent material to make, be formed at the whole substrate surface with described BM Pattern, because the first rete can cover in BM Pattern, and its baking temperature is lower than the minimum temperature that causes material (hereinafter to be referred as the BM material) volatilization that consists of described BM Pattern, therefore, in the process that forms the first rete, can not cause the volatilization of BM material, avoided the series of problems that brought by BM material volatilization, the pollution that for example the metal sputtering apparatus cavity is caused, pollution that touch-screen itself is caused etc.;
Further, high temperature for fear of splash-proofing sputtering metal makes the transparent material volatilization that consists of the first rete cause the problem of chamber contamination, the present invention continues to form barrier film at the first rete, because barrier film covers in the first rete, can avoid causing the transparent material that consists of the first rete at high temperature to volatilize, and, because consisting of the material of barrier film can not volatilize under the high temperature of splash-proofing sputtering metal layer, therefore, in the technological process of making individual layer external hanging type touch-screen, just can avoid the chamber of sputtering equipment and the problem that touch-screen itself is polluted.
Among the present invention, described metal pattern plays the function of the transmission of data in the final touch-screen that forms.
For fear of directly when being formed with the substrate surface splash-proofing sputtering metal layer of BM Pattern, because high temperature causes the volatilization of BM material, and then cause the chamber of sputtering equipment and the problem that touch-screen itself is polluted, individual layer external hanging type touch-screen provided by the invention and manufacturing process thereof, after substrate forms BM Pattern, directly do not form metal pattern, but form successively first the first rete and barrier film, form metal pattern at barrier film again, because the first rete can not cause again the volatilization of BM material when hiding BM Pattern, and barrier film can at high temperature not volatilize to prevent from guaranteeing when the first film material from high temperature volatilizing self material hiding the first rete, therefore, when the splash-proofing sputtering metal material forms metal level, just can not cause because of the high temperature of metallics the problem that metal sputtering apparatus cavity and touch-screen itself are polluted.
Better, described the first rete adopts resin type material transparent and insulation.
Concrete, described the first rete employing is transparent, the resin type material of insulation, can either satisfy the transparent demand of touch-screen viewing area, also can not affect the function of described metal pattern the transmission of data.For example, can adopt PC542 (polycarbonate-542) type resin material to make the first rete among the present invention, the baking temperature of this material is 220 ℃, and the volatilization temperature of BM material generally all is higher than 220 ℃, under 220 ℃ baking temperature, PC542 type resin material can keep preferably pattern, and is Transparent color, can satisfy the requirement of the first rete among the present invention.
Preferably, described barrier film adopts indium tin oxide ITO material or indium-zinc oxide IZO material.In subsequent embodiment, all take ITO material commonly used as example.
Concrete, when barrier film adopts the ITO material, and then when forming isolating pad, on the one hand, because ITO is metal material, its surface is dense, can at high temperature not produce volatilization, therefore when the metallics of follow-up sputter high temperature forms metal pattern, can not cause the problem that sputtering equipment chamber and touch-screen itself are polluted; On the other hand, owing to can adopt at normal temperatures the ITO material to form barrier film, can avoid causing the transparent material volatilization of the first rete; On the one hand, the transparent characteristic of ITO also can satisfy the requirement of viewing area again.
Preferably, form described metal pattern, specifically comprise: form the metal routing that is positioned at the non-viewing area of screen and the metal bridge that is positioned at the screen viewing area.
Concrete, form the metal routing that is positioned at the non-viewing area of screen, be to provide data-signal for the electric conduction routing to follow-up formation; The metal bridge that formation is positioned at the screen viewing area is can conducting be used to the interrupted type electric conduction routing that makes follow-up formation.
Preferably, the manufacturing process of described individual layer external hanging type touch-screen also comprises: form the second rete at the first rete that is formed with described metal routing and metal bridge, described the second rete adopts the resin type material; Described the second rete is carried out etching processing, form respectively the via hole that is positioned at the screen viewing area and the first pierced pattern that is positioned at the non-viewing area of screen, to expose described metal bridge and described metal routing; Be formed for determining the electric conduction routing of touch point at described the second rete with via hole and first pierced pattern, described electric conduction routing comprises interrupted type electric conduction routing and the continuous type electric conduction routing of arranged in a crossed manner and mutually insulated; Wherein, described interrupted type electric conduction routing and continuous type electric conduction routing all are connected with described metal routing by described the first pierced pattern, and described interrupted type electric conduction routing contacts with described metal bridge by described via hole.
Concrete, adopt at the first rete on the basis of resin type material, still adopt the resin type material to make the second rete, the temperature required owing to manufacture craft is not high, therefore can avoid high temperature to the harmful effect of the first film material.Making insulation course with materials such as adopting silicon nitride in the existing individual layer external hanging type technology for manufacturing touch screen compares, the present invention adopts the resin type material to make the second rete, can play the effect of isolated electric conduction routing and metal pattern (metal routing and metal bridge), also can play and avoid the high temperature production environment to bring the problem of BM material volatilization.
Concrete, when forming via hole and the first pierced pattern, whether the resin type material that can adopt according to the second rete is the concrete etching technics of Photosensitive material decision, for example, if the second rete adopts the Photosensitive resin material, then can adopt the techniques such as mask exposure and development to form via hole and the first pierced pattern, otherwise, can adopt the mode of dry etching or wet etching (ie in solution corrosion) to form via hole and the first pierced pattern.
Concrete, the first pierced pattern is regional for the hollow out that metal routing is exposed in described the second rete, so that electric conduction routing and the metal routing that forms in the subsequent technique coupled together, reaches the purpose of the transmission of data between metal routing and the electric conduction routing.
Better, the transparent and insulation of the resin type material that described the second rete adopts.
Concrete, described the second rete employing is transparent, the resin type material of insulation, on the one hand, satisfies the transparent requirement of viewing area, on the other hand, does not affect the function of described electric conduction routing conduction.
Better, the thickness of described the second rete is greater than the thickness of described BM Pattern; Or the thickness of described the first rete is greater than the thickness of described BM Pattern; Or the thickness sum of the thickness of described the first rete and the second rete is greater than the thickness of described BM Pattern.
Concrete, owing to having the position, segment difference section of a slope shape among the BM Pattern, accordingly, in the first rete of follow-up formation and the second rete, also all can have a slope shape position, excessive for fear of the steepness that differs from the position because of BM Pattern stage casing, and cause the steepness at slope shape position in the second rete also larger, and then cause in the subsequent technique the easily problem of broken string of the electric conduction routing that forms along the surface at slope shape position in the second rete, can be by following three kinds of modes among the present invention so that in the second rete the steepness at slope shape position less than the steepness at poor position, BM Pattern stage casing, that is: make the thickness of described the first rete greater than the thickness of described BM Pattern, or the thickness of described the second rete is greater than the thickness of described BM Pattern; Or the thickness sum of the thickness of described the first rete and the second rete is greater than the thickness of described BM Pattern.
Better, be formed for determining at described the second rete with via hole and first pierced pattern specifically comprising the electric conduction routing of touch point: form conductive layer at described the second film surface with via hole, described conductive layer and electric conduction routing employing same material; Described conductive layer is carried out etching processing, form interrupted type electric conduction routing and the continuous type electric conduction routing of arranged in a crossed manner and mutually insulated, wherein, be connected with described metal routing by described the first pierced pattern so that described interrupted type electric conduction routing is connected with the continuous type electric conduction routing, and so that described interrupted type electric conduction routing contact with described metal bridge by described via hole.
Concrete, form described electric conduction routing among the present invention, can adopt the mode of the electric conduction routing that is formed for definite touch point in the prior art, for example, surface at the second rete with via hole and first pierced pattern forms conductive layer, then by etching technics, form and mutually intersect and many interrupted type electric conduction routing and the continuous type electric conduction routing of insulation.Similar with the electric conduction routing that is used for definite touch point that forms in the prior art, among the present invention, described interrupted type electric conduction routing is made of the conduction line segment of a plurality of separation, wherein, each conduction line segment contacts with described metal bridge by the via hole on described the second rete, thereby realizes the conducting of whole interrupted type electric conduction routing; The continuity electric conduction routing is made of whole piece conduction line segment; Described interrupted type electric conduction routing and continuous type electric conduction routing all extend to the non-viewing area of screen along the slope shape position on described the second rete by the screen viewing area, because the steepness at the slope shape position on described the second rete is less, surface ratio is more smooth, therefore can not cause described interrupted type electric conduction routing and continuous type electric conduction routing broken string.
Concrete, be connected with described metal routing by described the first pierced pattern so that described interrupted type electric conduction routing is connected with the continuous type electric conduction routing, can realize the purpose of the transmission of data between metal routing and described interrupted type electric conduction routing, the continuous type electric conduction routing.
Better, described electric conduction routing adopts the ITO material.
Concrete, similar with prior art, described electric conduction routing adopts the ITO material of transparent and electrically conductive to make.
Better, the manufacturing process of described individual layer external hanging type touch-screen also comprises: form the tertiary membrane layer with setting hardness at described the second rete that is formed with electric conduction routing, described tertiary membrane layer adopts the resin type material; Described tertiary membrane layer is carried out etching processing, form the second pierced pattern that is positioned at non-viewing area, to expose described metal routing; Described metal routing is connected with described flexible print circuit board.
Concrete, in order to protect each functional unit that forms described individual layer external hanging type touch-screen, on the second rete, form the tertiary membrane layer that covers whole screen area and have setting hardness, among the present invention, can select have the resin type material of setting hardness according to concrete needs and make the tertiary membrane layer; The tertiary membrane layer that adopts the resin type material to make, its manufacture craft does not need higher temperature, therefore, can not cause harmful effect to the second rete.
Concrete, the second pierced pattern is in the described tertiary membrane layer for the hollow out zone that described metal routing is exposed, so that metal routing can be connected with flexible print circuit board the purpose of the transmission of data between realization flexible print circuit board and the metal routing.Wherein, when forming the second pierced pattern, whether the material that can adopt according to described tertiary membrane layer is that the Photosensitive resin material is determined concrete etching technics, for example, if described tertiary membrane layer adopts the Photosensitive resin material, then can adopt the techniques such as mask exposure and development to form the second pierced pattern, otherwise, just can adopt the mode of dry etching or wet etching (ie in solution corrosion) to form the second pierced pattern.
Better, the transparent and insulation of the resin type material that described tertiary membrane layer adopts.
Concrete, described tertiary membrane layer employing is transparent, the resin type material of insulation, can either satisfy the transparent requirement of viewing area, can satisfy again it as the needs of touch-screen outermost layer insulation.For example, the present invention can adopt the Photosensitive resin to make the tertiary membrane layer, only need to carry out mask exposure when forming like this pattern of tertiary membrane layer and developing process gets final product.
It is to be noted, in the manufacturing process of individual layer external hanging type touch-screen provided by the invention, described the first rete, the second rete, tertiary membrane layer all are to adopt the resin type material to make, but whether the present invention is identical less than restriction, as long as can reach the present invention to the requirement of each rete to the resin type material that each rete adopts.
Embodiment one
The present embodiment provides a kind of individual layer external hanging type touch-screen manufacturing process, and shown in Fig. 3 (1)～3 (11), this manufacturing process specifically comprises:
Steps A, apply one deck BM material at glass substrate 301, then this layer BM material being carried out photoengraving processes, form the BM Pattern 302 of the non-viewing area of cover screen, shown in Fig. 3 (1), has the poor position 303 of first paragraph of a slope shape on this BM Pattern 302 near the position of screen viewing area;
Step B, apply the resin type material of layer of transparent, insulation on the glass substrate 301 of BM Pattern 302, the baking temperature of this resin type material is lower than the minimum temperature that causes described BM material volatilization, then this layer resin type material is toasted, form the first rete 304, shown in Fig. 3 (2), the thickness of the first rete 304 is slightly larger than the thickness of BM Pattern 302, so that the steepness at the poor position 305 of second segment on the first rete 304 is less than the steepness at the poor position 303 of first paragraph, surface ratio is more smooth;
Step C, adopt the ITO material at the first rete 304 platings one rete, form barrier film 306, shown in Fig. 3 (3), because the coating process of ITO material does not need higher temperature, just can not cause harmful effect to the first rete 304 that the resin type material is made yet;
Step D, sputter layer of metal material on barrier film 306, form metal level 307, described metallics can be molybdenum or aluminium neodymium material, shown in Fig. 3 (4), because barrier film 306 covers in the first rete 304, therefore can be because of the metallics temperature of sputter not higher and the first rete 304 that the resin type material is made causes harmful effect, and because the first rete 304 covers in BM Pattern 302, just can not cause the volatilization of BM material yet, and then can not cause the chamber of sputtering equipment and/or touch screen structure to receive pollution;
Step e, described metal level 307 and barrier film 306 are carried out etching processing, shown in Fig. 3 (5), the isolating pad 310 that forms the metal routing 308 be positioned at the non-viewing area of screen, the metal bridge 309 that is positioned at the screen viewing area and metal routing 308 and metal bridge 309 and the first rete 304 are kept apart;
Step F, continuation applies the resin material of transparent, insulation, Photosensitive at the first rete 304, form the second rete 311, shown in Fig. 3 (6), has position, the 3rd segment difference section 316 on the second rete 311, because the steepness at the poor position 305 of second segment on the first rete 304 is less than the steepness at the poor position 303 of first paragraph, therefore, the surface ratio of position, the 3rd segment difference section 316 is more smooth;
Step G, utilize photoetching process that the second rete 311 is carried out etching processing and form the via hole 312 that is positioned at the screen viewing area and the first pierced pattern 313 that is positioned at the non-viewing area of screen, shown in Fig. 3 (7), by forming via hole 312, the part of metal bridge 309 is exposed, by forming the first pierced pattern 313, the part of metal routing 308 is exposed;
Step H, adopt the ITO material having the second rete 311 platings one rete of via hole 312 and the first pierced pattern 313, and form many interrupted type ITO cablings 314 that arrange along the first direction initialization by photoetching process, and many continuous type ITO cablings 315 that arrange along the second direction initialization;
Shown in Fig. 3 (8), every the interrupted type ITO cabling 314 that forms is made of the ITO line segment of a plurality of separation, each ITO line segment contacts with metal bridge 309 by via hole 312, and interrupted type ITO cabling 314 extends to screen non-viewing area along position, the 3rd segment difference section 316 by the screen viewing area near the part of the non-viewing area of screen, is connected with the metal routing 308 that exposes by the first pierced pattern 313;
Every continuous type ITO cabling 315 is made of a whole piece ITO cabling, and continuous type ITO cabling 315 extends to screen non-viewing area along position, the 3rd segment difference section 316 by the screen viewing area near the part of non-viewing areas, is connected with metal routing 308 in the non-viewing area by the first pierced pattern 313;
Continuous type ITO cabling 315 is arranged in a crossed manner with interrupted type ITO cabling 314, and each other insulation, and the first direction initialization and the second direction initialization have vertical relation;
Need to prove, in Fig. 3 (8), only show the part in the ITO line segment of above-mentioned a plurality of separation, in order to the connected mode between adjacent two intermittence ITO cablings 314 to be described.
Step I shown in Fig. 3 (9), applies the Photosensitive resin material of layer of transparent, insulation at the second rete 311, form the tertiary membrane layer 317 with certain degree of hardness; Do not need higher temperature owing to adopting the resin type material to make tertiary membrane layer 317, therefore, can not cause harmful effect to the second rete 311;
Step J carries out the processing such as mask exposure and development to described tertiary membrane layer 317, forms the second pierced pattern 318 be positioned at the non-viewing area of screen, shown in Fig. 3 (10), the second pierced pattern 318 so that the sub-fraction of described metal routing 308 exposed;
Step K, shown in Fig. 3 (11), by the second pierced pattern 318, metal routing 308 and the flexible print circuit board 319 that will expose couple together.
In the present embodiment, thickness that can also be by making the second rete 311 is greater than the thickness of BM Pattern 302, perhaps the thickness sum of the thickness by making the first rete 304 and the second rete 311 is greater than the thickness of BM Pattern302, reach so that the more smooth purpose of surface ratio of position, the 3rd segment difference section 316, thereby avoid because the steepness at the poor position 303 of first paragraph is larger, and cause interrupted type ITO cabling 313 and the continuous type ITO cabling 315 easy problems that produce short-term that 316 surfaces form along position, the 3rd segment difference section.
In the individual layer external hanging type touch-screen manufacturing process that the present embodiment provides, also increase following steps, to finish the individual layer external hanging type touch-screen applications that will make in liquid crystal display, concrete steps are as follows:
Step L, tertiary membrane layer 317 surface of the individual layer external hanging type touch-screen that completes in step K apply one deck OCA (Optical Clear Adhesive, optical cement) layer;
Step M shown in Fig. 3 (11), utilizes described OCA layer, and step L the individual layer external hanging type touch-screen that completes and the LCDs of making are bonded together, and forms touch-control liquid crystal display.
Accordingly, the present invention also provides a kind of individual layer external hanging type touch-screen, this touch-screen is made by the manufacturing process of individual layer external hanging type touch-screen provided by the invention, comprising: substrate, black matrix pattern BM Pattern, the first rete, isolating pad, metal pattern; Wherein, described BM Pattern is formed on the described substrate surface, and is positioned at the non-viewing area of screen; Described the first rete is formed on the substrate surface with described BM Pattern, is made of transparent material; Described isolating pad is formed on described the first rete, is made of transparent conductive material; Described metal pattern is formed on the described isolating pad.
Preferably, described isolating pad adopts tin indium oxide ITO material.
Preferably, described metal pattern specifically comprises: be positioned at the metal routing of the non-viewing area of screen, and be positioned at the metal bridge of screen viewing area.
Preferably, described individual layer external hanging type touch-screen also comprises: be formed at the second rete on the first rete of described metal pattern, and be formed at electric conduction routing on described the second rete; Wherein, described the second rete position of being positioned at the screen viewing area has via hole; The position that described the second rete is positioned at the non-viewing area of screen has the first pierced pattern; And described electric conduction routing specifically comprises: interrupted type electric conduction routing, continuous type electric conduction routing; Arranged in a crossed manner and the mutually insulated of described interrupted type electric conduction routing and described continuous type electric conduction routing; Described interrupted type electric conduction routing is connected with the continuous type electric conduction routing and is connected with described metal routing by described the first pierced pattern; Described interrupted type electric conduction routing contacts with described metal bridge by described via hole.
Preferably, the thickness of described the first rete is greater than the thickness of described BM Pattern; Or the thickness of described the second rete is greater than the thickness of described BM Pattern; Or the thickness sum of the thickness of described the first rete and the second rete is greater than the thickness of described BM Pattern.
Concrete, owing to having the position, segment difference section of a slope shape among the BM Pattern, accordingly, in the first rete of follow-up formation and the second rete, also all can have a slope shape position, excessive for fear of the steepness that differs from the position because of BM Pattern stage casing, and cause the steepness at slope shape position in the second rete also larger, and then cause in the subsequent technique the easily problem of broken string of the electric conduction routing that forms along the surface at slope shape position in the second rete, can be by following three kinds of modes among the present invention so that in the second rete the steepness at slope shape position less than the steepness at poor position, BM Pattern stage casing, that is: make the thickness of described the first rete greater than the thickness of described BM Pattern, or the thickness of described the second rete is greater than the thickness of described BM Pattern; Or the thickness sum of the thickness of described the first rete and the second rete is greater than the thickness of described BM Pattern.
Better, described touch-screen also comprises: be formed at the tertiary membrane layer on the second rete of described electric conduction routing, described tertiary membrane layer adopts the resin type material; The position that described tertiary membrane layer is positioned at the non-viewing area of screen has the second pierced pattern; Described electric conduction routing is connected on the described flexible print circuit board by described the second pierced pattern.
It is to be noted, in the individual layer external hanging type touch-screen provided by the invention, described the first rete, the second rete, tertiary membrane layer all are to adopt the resin type material to make, but whether the present invention is identical less than restriction, as long as can reach the present invention to the requirement of each rete to the resin type material that each rete adopts.
Embodiment two
The present embodiment provides a kind of individual layer external hanging type touch-screen, as shown in Figure 4, comprising: substrate 401, BM Pattern 402, position, segment difference section 403, the first rete 404, the first slope shape position 405, isolating pad 406, metal routing 407, metal bridge 408, the second rete 409, via hole 410, the first pierced pattern 411 (not shown)s, position, the second slope 412, interrupted type electric conduction routing 413, continuous type electric conduction routing 414, tertiary membrane layer 415, the second pierced pattern 416, flexible printed circuit board 417;
Wherein, substrate 101 adopts glass material to make; Be covered with whole screen area; Be used for each functional unit that carrying consists of whole individual layer external hanging type touch-screen;
The first rete 404 adopts resin type material transparent, insulation to make, and the baking temperature of this resin type material is lower than the minimum temperature that causes the volatilization of BM material; Be formed on the glass substrate 401 with BM Pattern 402, cover whole screen area, its thickness is greater than the thickness of BM Pattern 402; The position, boundary that is positioned at screen viewing area and the non-viewing area of screen in the first rete 404 is position, the first slope 405, this position, the first slope 405 is corresponding with position, segment difference section 103, be ramp shaped, the steepness at position, the first slope 405 is less than the steepness of position, segment difference section 103;
Isolating pad 406 adopts the ITO material to make; Be formed on the first rete 404;
Metal routing 407 adopts molybdenum or aluminium neodymium material to make; Be formed on the isolating pad 406, be positioned at the non-viewing area of screen, the isolating pad 406 that is in contact with it has identical pattern;
The second rete 409 adopts resin type material transparent, insulation to make; Be formed on the first rete 404 with metal routing 407 and metal bridge 408, cover whole screen surface; The position that is positioned at the screen viewing area in the second rete 409 has via hole 410, and the position that is positioned at the non-viewing area of screen has the first pierced pattern 411; The position, boundary that is positioned at screen viewing area and the non-viewing area of screen in the second rete 409 is position, the second slope 412, this position, the second slope 412 is corresponding with position 405, the first slope, be ramp shaped, the steepness at position, the second slope 412 is less than the steepness of position, segment difference section 103;
Interrupted type electric conduction routing 413 adopts the ITO material to make; Be formed on the second rete 409, be made of the conduction line segment of a plurality of separation, each conduction line segment all contacts with metal bridge 408 by via hole 410, so that the interrupted type electric conduction routing 413 of whole piece can conducting; Interrupted type electric conduction routing 413 extends to the non-viewing area of screen along the surface at position, the second slope 412 by the screen viewing area, and passes the first pierced pattern 411 and be connected with metal routing 407;
Continuous type electric conduction routing 414 adopts the ITO material to make; Be formed on the second rete 409, consisted of by a whole piece electric conduction routing; Continuous type electric conduction routing 414 extends to the non-viewing area of screen along the surface at position, the second slope 412 by the screen viewing area, and passes the first pierced pattern 411 and be connected with metal routing 407;
Interrupted type electric conduction routing 413 is arranged in a crossed manner with continuous type electric conduction routing 414, and mutually insulated; Interrupted type electric conduction routing 413 is connected with the continuous type electric conduction routing all by being connected to realize data transmission with metal routing 407, and is used for definite touch point;
Flexible printed circuit board 417 is connected with the metal routing 408 that exposes by the second pierced pattern 416, be used for and metal routing 408 between the transmission of data.
In the present embodiment, thickness that can also be by the second rete 409 is set is greater than the thickness of BM Pattern 402, perhaps, the thickness sum of the thickness of the first rete 404 and the second rete 409 is greater than the thickness of BM Pattern402, to reach so that the more smooth purpose of surface ratio at position, the second slope 412, to avoid the easily problems of broken string of 412 surfaces form along position, the second slope interrupted type electric conduction routing 413 and continuous type electric conduction routing 414.
Accordingly, the present invention also provides a kind of liquid crystal display, and this display comprises individual layer external hanging type touch-screen provided by the invention.
Embodiment three
The present embodiment provides a kind of liquid crystal display, and as shown in Figure 5, this display comprises: individual layer external hanging type touch-screen 501, OC layer 502, TFT-LCD LCDs 503; Wherein,
Individual layer external hanging type touch-screen 501 has individual layer external hanging type touch screen structure provided by the invention;
OC layer 502 adopts optical cement OCA, is coated on the outside surface of the tertiary membrane layer in the individual layer external hanging type touch-screen 501;
TFT-LCD LCDs 503 is bonded together by OC layer 502 and individual layer external hanging type touch-screen 501.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the method for making of an individual layer external hanging type touch-screen is characterized in that, comprising:
Form the black matrix pattern BM Pattern that is positioned at the non-viewing area of screen at substrate surface;
Form the first rete at the substrate surface that is formed with BM Pattern, described the first rete adopts transparent material, and the baking temperature of this transparent material is lower than the minimum temperature that causes the material volatilization that consists of described BM Pattern;
Surface at described the first rete forms barrier film and metal level successively, and described barrier film adopts transparent conductive material, and described transparent conductive material is non-volatile under the high temperature of the described metal level of sputter;
Described metal level and barrier film are carried out etching processing, form respectively metal pattern and isolating pad.
2. the method for claim 1 is characterized in that, described barrier film adopts indium tin oxide ITO material or indium-zinc oxide IZO material.
3. the method for claim 1 is characterized in that, forms described metal pattern, specifically comprises: form the metal routing that is positioned at the non-viewing area of screen and the metal bridge that is positioned at the screen viewing area.
4. method as claimed in claim 3 is characterized in that, also comprises:
Form the second rete at the first rete that is formed with described metal routing and metal bridge, described the second rete adopts the resin type material;
Described the second rete is carried out etching processing, form respectively the via hole that is positioned at the screen viewing area and the first pierced pattern that is positioned at the non-viewing area of screen, to expose described metal bridge and described metal routing;
Be formed for determining the electric conduction routing of touch point at described the second rete with via hole and first pierced pattern, described electric conduction routing comprises interrupted type electric conduction routing and the continuous type electric conduction routing of arranged in a crossed manner and mutually insulated; Wherein, described interrupted type electric conduction routing and continuous type electric conduction routing all are connected with described metal routing by described the first pierced pattern, and described interrupted type electric conduction routing contacts with described metal bridge by described via hole.
5. an individual layer external hanging type touch-screen is characterized in that, comprising: substrate, black matrix pattern BM Pattern, the first rete, isolating pad, metal pattern; Wherein,
Described BM Pattern is formed on the described substrate surface, and is positioned at the non-viewing area of screen;
Described the first rete is formed on the substrate surface with described BM Pattern, is made of transparent material;
Described isolating pad is formed on described the first rete, is made of transparent conductive material;
Described metal pattern is formed on the described isolating pad.
6. touch-screen as claimed in claim 5 is characterized in that, described isolating pad adopts indium tin oxide ITO material or indium-zinc oxide IZO material.
7. touch-screen as claimed in claim 5 is characterized in that, described metal pattern specifically comprises: the metal routing and the metal bridge that is positioned at the screen viewing area that are positioned at the non-viewing area of screen.
8. touch-screen as claimed in claim 7 is characterized in that, described touch-screen also comprises: be formed at the second rete on the first rete of described metal pattern, and be formed at electric conduction routing on described the second rete; Wherein,
The position that described the second rete is positioned at the screen viewing area has via hole;
The position that described the second rete is positioned at the non-viewing area of screen has the first pierced pattern;
And described electric conduction routing specifically comprises: interrupted type electric conduction routing, continuous type electric conduction routing;
Arranged in a crossed manner and the mutually insulated of described interrupted type electric conduction routing and described continuous type electric conduction routing;
Described interrupted type electric conduction routing is connected with the continuous type electric conduction routing and is connected with described metal routing by described the first pierced pattern;
Described interrupted type electric conduction routing contacts with described metal bridge by described via hole.
9. touch-screen as claimed in claim 8 is characterized in that,
The thickness of described the first rete is greater than the thickness of described BM Pattern; Or,
The thickness of described the second rete is greater than the thickness of described BM Pattern; Or,
The thickness sum of the thickness of described the first rete and the second rete is greater than the thickness of described BM Pattern.
10. a liquid crystal display is characterized in that, comprising: such as the arbitrary described individual layer external hanging type touch-screen of claim 5～9.
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