CN1628261A

CN1628261A - Method for producing liquid crystal display

Info

Publication number: CN1628261A
Application number: CNA028289978A
Authority: CN
Inventors: 中川信义
Original assignee: BINIT CORP
Current assignee: Intelligent Electronic Technology Co., Ltd.
Priority date: 2002-05-24
Filing date: 2002-05-24
Publication date: 2005-06-15
Anticipated expiration: 2022-05-24
Also published as: JP3769576B2; CN100376941C; KR20050003369A; JPWO2003100509A1; KR100760396B1; WO2003100509A1; HK1079575A1

Abstract

A method for producing a liquid crystal display having a glass substrate, especially a liquid crystal display for thin mobile apparatus such as a portable telephone, at a low cost. The method for producing a liquid crystal display, wherein a large size cell obtained by pasting a pair of mother glasses subjected to pretreatment of liquid crystal display is divided into a plurality of intermediate size cells which are then subjected to thin plate machining to have the thickness of a product before being divided into small productsize cells. According to the production method, the thin plate polishing process can be performed efficiently and the cause of rejectable product can be eliminated.

Description

The manufacture method of liquid crystal indicator

Invention field

The present invention relates to have the manufacture method of the liquid crystal indicator of glass substrate, particularly be applicable to the manufacture method of the liquid crystal indicator of mobile devices such as mobile phone, audio frequency and portable equipment.

Background technology

In recent years, mobile device and portable equipment for using liquid crystal further require small-sized, slim, lightweight, in the particularly nearest clamshell phone, its outer surface portion is provided with secondary monitor and can sees the time immediately or have or not Email reception etc. that this pattern is in continuous increase.This secondary monitor requires higher function, and the thickness increase of secondary monitor will influence the gross thickness of equipment in addition, and therefore the slimming to display (liquid crystal indicator) requires higher.

In the past, as the manufacture method of the liquid crystal indicator that is used for mobile device, method was as shown in figure 10 arranged.In this method, preparation can obtain a pair of glass substrate (basic pattern glass) of the sort of size of the liquid crystal cells of a plurality of product sizes, carry out the pre-treatment used for liquid crystal display, implement not shown electrode formation, the formation of alignment films, processing, form section substrate 91 and public substrate 92.

In the operation of next, to section substrate 91 as shown in figure 11, in order to cut off later on processing and big or small corresponding with the liquid crystal cells that forms product size, printing forms sealing 82 on its outer peripheral areas, and then in the outer peripheral areas printing formation peripheral seal 93 of section substrate 91.Bonding then section substrate 91 and public substrate 92 form large-size units 96, carry out sintering with suitable temperature, make sealing 82 and peripheral seal 93 sclerosis.In addition, peristome 83,94 is set, makes in the section substrate 91 of fitting air unlikely damage sealing of overflowing during with public substrate 92 in sealing 82 and peripheral seal 93 places.After this external applying, interim sealing such as the peristome 94 usefulness epoxy resin of peripheral seal 93.In grinding step thereafter, foreign matters such as anti-sealing, abrasive substance enter inside from the extremely narrow gap (usually with 5 μ m degree) of section substrate 91 and public substrate 93 like this.

Secondly, add that with lapping device lapping compound grinds at least one surface of large-size units 96, make thickness of slab be thinned to t1, thereby form slim large-size units 96a from t0.By the thin plate process of this grinding step, for example the thickness of slab t0=1.0mm (one-sided 0.5mm) of large-size units 96 is ground to till thickness of slab t1=0.6mm (one-sided 0.3mm) degree of slim large-size units 96a.But it is, then, therefore very difficult for fragile the splitting of big young pathbreaker of basic pattern glass if form than this thinner thin plate.

Then, will cut into the small size unit 97 of product size through the large-size units after the thin plate processing 96.At this moment, cut off according to the inboard slightly line 97 of peripheral seal 93 in the outer peripheral areas, throw away peripheral seal 93.In addition, the foreign matter of lapping compound etc. of gap 93a that enters the more lateral of peripheral seal 93 is thrown away with peripheral seal 93.

Then, small size unit 97 injects liquid crystal from peristome 83, and closed peristome 83, and is inner to seal 82 protections, grinds once more.Like this, small size unit 97 is thinned to thickness of slab t2, makes the liquid crystal cells 97a of product thickness t2.Again, in the thin plate process of this grinding step, for example the thickness of slab t1=0.6mm of small size unit 97 (one-sided 0.3mm) is ground to till thickness of slab t2=0.4mm (one-sided 0.2mm) degree of liquid crystal cells 97a.

Like this, form products, but in the 2nd grinding step, foreign matters such as lapping compound might enter the exterior lateral area 82a of sealing 82, owing to form portion of terminal on this zone,, easily produce the situation of misoperation so that portion of terminal is subjected to is stained through 2 grinding steps.In addition, owing to the exterior lateral area 82a that seals 82 can not throw away, so when causing that by grinding step the crack occurs here, just become substandard products.That is, yield rate worsens, and production efficiency descends.Therefore, there is the problem that increases production cost in this production method in the past.

In addition, in order to reduce cost, yet useful thin glass does not add the situation of grinding and using, but carries, cleans, adds distortion, the breakage that easily produce glass man-hour in the manufacturing process of said units, can not use extra-thin glass in the manufacturing process.Promptly there is the problem that to produce extra-thin display, can not produce extra-thin product.

The present invention considers these problems, its purpose be to provide by the grinding step that improves thin plateization can substandard products not taken place, enhanced productivity, the LCD device preparation method of liquid crystal indicator cheaply.

Summary of the invention

According to the manufacture method of the described liquid crystal indicator in the 1st aspect of the present invention, large-size units is divided into the middle size unit that comprises a plurality of small sizes unit, is divided into the small size unit after carrying out thin plate processing under this state.Size unit thin plate handling ease in the cause, thin plate chemical industry preface only is 1 time.In addition, the peripheral part that comprises foreign matter in the thin plate chemical industry preface is thrown away.

Again, according to the manufacture method of the described liquid crystal indicator in the 2nd aspect of the present invention, on large-size units, form a plurality of in size unit peripheral seal, its peristome is arranged at adjacent edge one side of middle size unit usefulness peripheral seal.So, during the size unit, form sealing under the state that can carry out attrition process in cutting into, peristome is in the face of section simultaneously.

According to the manufacture method of the described liquid crystal indicator in the 3rd aspect of the present invention, large-size units is carried out till thin plateization is machined to midway thickness size unit in being divided into again.Like this, the middle size unit processing capacity that carries out thin plate processing reduces handling ease.

Again, according to the manufacture method of the described liquid crystal indicator in the 4th aspect of the present invention, adjacent middle size unit is with being sealed by the part sealing between the peripheral seal, and at least one place wherein is as peristome simultaneously.Like this, by complete closed, under the state of large-size units, can carry out attrition process between the basic pattern glass.

Again,, remove the minute crack that takes place because of scribing fully, even thin thickness waits also not cracky for impacting input according to the manufacture method of the described liquid crystal indicator in the 5th aspect of the present invention.

Again, according to the manufacture method of the described liquid crystal indicator in the 6th aspect of the present invention, large-size units is split into the middle size unit of modest size, makes thin plate chemical industry preface afterwards easy.

In addition, by following detailed description with reference to the accompanying drawings, other purposes of the present invention, speciality will be apparent.

Description of drawings

Fig. 1 illustrates example the 1st example of the manufacture method of liquid crystal indicator of the present invention, is the stereographic map of each manufacturing process of explanation.

Fig. 2 illustrates the planimetric map of example the 1st example of the manufacture method of liquid crystal indicator of the present invention.

Fig. 3 illustrates manufacturing process's process flow diagram of example the 1st example of the manufacture method of liquid crystal indicator of the present invention.

Fig. 4 illustrates the planimetric map of process of example the 1st example of the manufacture method of liquid crystal indicator of the present invention.

Fig. 5 is the part enlarged drawing of the S portion of Fig. 4.

Fig. 6 is the X-X line sectional drawing of Fig. 5.

Fig. 7 illustrates the state sectional drawing after the firm cut-out of Fig. 6.

Fig. 8 illustrates example the 2nd example of the manufacture method of liquid crystal indicator of the present invention, is the stereographic map of each manufacturing process of explanation.

Fig. 9 illustrates the planimetric map of example the 2nd example of the manufacture method of liquid crystal indicator of the present invention.

Figure 10 is the stereographic map that the manufacture method of liquid crystal indicator in the past is shown.

Figure 11 is the planimetric map that the manufacture method of liquid crystal indicator in the past is shown.

Embodiment

Fig. 1～Fig. 7 illustrates the 1st example for the optimal morphology of the manufacture method of implementing liquid crystal indicator of the present invention.

The 1st example illustrates the method for being made the ultrathin liquid crystal indicator that is used for mobile device by a pair of

basic pattern glass

1,2.

In the manufacture method of the liquid crystal indicator of this example, use not shown lapping device, scribing cutter etc.As lapping device, it possesses platform up and down, flows into lapping compound Grinding clip liquid crystal cells betwixt, preferably uses double-side polishing apparatus, but also can use the single face lapping device.

Again, not shown scribing cutter, be the rotating adamas that forms for scribing glass or superhard cylinder shape cutter, simultaneously adding loading simultaneously rotates this scribing cutter on glass, marking on glass becomes the scar that cuts off line, by knock this scar around, can cut off along the line.

The liquid crystal indicator 10 of product size is made like this, and a pair of basic pattern glass of promptly fitting with wear down and cut and be divided into small pieces in addition such as lapping device and scribing cutter, is made after liquid crystal being enclosed the gap of a pair of glass again.One side is called section substrate 71 (1 in the manufacture process, 61), and the opposing party is called public substrate 102 (2 in the manufacture process, 62,72), applies the various processing that can do various demonstrations by the electrical control liquid crystal on the two substrates surface.

As the type of the glass substrate that is used for this liquid crystal indicator, STN (super-twist nematic) substrate, TFT (thin film transistor (TFT)) substrate etc. are arranged.

Below explanation is according to the manufacture method of the liquid crystal indicator of above-mentioned formation.

A pair of

basic pattern glass

1,2 for the line that puts into production, in initial substrate manufacturing procedure 21, is public substrate 2 and the pre-treatment of implementing to make liquid crystal display as forming a side for section substrate 1, the opposing party, goes up at glass surface (relative face) and implements electrode formation, the film formed processing of orientation etc.As for the size of this

basic pattern glass

1,2, general little available length * wide is the glass of 200mm * 200mm, the glass of big available 400mm * 500mm, but preferably consider product size, adopt the size of not wasting

base plate glass

1,2.

Secondly in bonding process 22, at first,, liquid crystal bonding with glass enclose, prevent that dust from entering from the outside etc. is purpose, and as shown in Figure 2, coating forms banded sealing 11,12.Sealing 11 is middle size unit with peripheral seal 11, and is a plurality of for

basic pattern glass

1,2 is divided into, and preferably forms with square, as 4 cutting apart, 6 cut apart, 9 cut apart, 12 cutting apart formation cutting apart.Be more preferably 4～9 and cut apart, this example illustrates the example that is divided into 4.

About the number of cutting apart of

basic pattern glass

1,2 because it is few to cut apart the middle size unit of formation with 2, have little significance, so wish that at least 4 cut apart abovely, if 12 cut apart abovely, then processing capacity is excessive, cost increases, so 9 cut apart following with more suitable.

With

peripheral seal

11,1 peristome 111 is set at least separately for middle size unit, is overlapping a pair of

basic pattern glass

1,2 o'clock, form the connected entrance of the usefulness that deflates.

Again, sealing 12 be the small size unit corresponding with the product size 13 of dotted line with sealing 12, a plurality of for middle size unit 6 is divided into, preferably form by square, be divided into 4 example shown in this example.Liquid crystal is just enclosed the inside that sealing 12 is surrounded.To sealing the deflate peristome 121 of usefulness of at least a portion setting of 12.As for the material of this sealing, adopt epoxy resin proper.In each planimetric map of Fig. 2 etc.,, omit this situation of representing with stain because printing similarly forms sealing 12 on glass substrate.

Secondly, fit section substrate 1 and public substrate 2 are used the proper temperature sintering, form large-size units 4.The thickness of a pair of no better than basic pattern thickness of glass of thickness t 0 addition of this large-size units 4 (because of the thickness of liquid crystal layer is extremely thin, 5 μ m degree).

Then, in formation, in the cut-out operation 23 of size unit, carry out scribing, form scar (as cutting off shown in the line 53,54) on the two sides of large-size units 4.By knock cut off

line

53,54 near, utilize the scribing crackle that breaks, will be divided into through the large-size units 5 of scribing a plurality of in size unit 6 (in this form being 4).

Secondly in thin plate chemical industry preface 24, interim sealing is facing to the peristome 111 that cuts off

line

53,54 openings, and at least one face of size unit 6 in the grinding is during this grinds, till the thickness of slab of middle size unit 6 by disposable wear down to the thickness of product is t2 from t0.Thickness of slab t2=0.4mm (one-sided 0.2mm) after for example therefrom initial thickness of slab t0=1.4mm (one-sided 0.7mm) wear down of size unit 6 is extremely ground.Clean and remove lapping compound etc. then.In addition, in the thin plate chemical industry preface 24, though middle size unit 6 contact lapping compounds and water etc., because of in peristome 111 between size section substrate 61 and the middle size public substrate 62 sealed temporarily, so the no foreign matter in inside, unit enters.

Secondly, identical with the cut-out operation 23 of size unit in the above-mentioned formation in the cut-out operation 25 that forms the small size unit, cut off along cutting off line 63,64.In this example, be to cut apart the small size unit 7 that forms product size by 4, cut apart, can be divided into suitable quantity according to the size of product size but be not limited to 4.For example 4～9 dividing degrees are better.At this moment, the foreign matter of the exterior lateral area 11a of the sealing 11 of size unit 6 is thrown away because of the cut-out of cutting off line 63,64 in entering in the thin plate chemical industry preface 24, can stainedly not be formed at inboard portion of terminal 18.In addition, in thin plate chemical industry preface 24, also thrown away, so can remove the reason that produces substandard products by grinding the crackle that might take place at the exterior lateral area 11a of sealing 11.

Then, the small size unit 7 that has cut off cuts off in the operation 26 at the single face of portion of terminal, in order on small size section substrate 71, to form terminal, cut off the part of small size public substrate 72 to cut off line 73, one side become the small size unit 10 of the step of dwindling with small size public substrate 72.

Secondly, in the chamfering process 27 of cut-out portion, carry out the chamfering in divisional plane bight.Usually, when applying scribing generation slight crack, the slight crack that moves towards except edge cut-out line 63,64 on the scribing face 14, often cause generation a plurality of crackles 15 (minute crack) on the direction different with the direction of cutting off line 63,64 because of various deviations.Generally be because the bight that cuts off becomes sharp keen state, danger close, thus to implement chamfering, but all the time just in order to remove the bight of acute angle, and do not consider the situation that minute crack exists.In addition, suitable thickness is arranged as glass, minute crack Cheng Taida problem not then, but thin more influence is big more.As shown in Figure 6, in order to remove the minute crack 15 in the divisional plane bight that takes place because of scribing fully, implement here, (shown in chamfering line 16) chamfer machining.

Then, after the chamfering of divisional plane bight, inject liquid crystal from peristome 121 in the liquid crystal injection process 28, closed peristome 121 attaches Polarizer in Polarizer attaching operation 29, by checking operation 30, finish liquid crystal cells.

According to this example, then owing to adopted large-size units 4 to be divided into to contain the middle size unit 6 of a plurality of small sizes unit 7, after doing thin plate processing under this state, be divided into the manufacture method of the liquid crystal indicator of small size unit 7, so middle size unit that grinding size is littler than large-size units 4, carry out thin plate processing easily, only just finish thin plate chemical industry preface 1 time.In addition, the peripheral part that contains foreign matter in the thin plate chemical industry preface is thrown away.Therefore, can more effectively implement the grinding step of thin plateization, the simultaneously not stained portion of terminal 18 that is formed at the inboard, the crack that might betide the exterior lateral area 11a of sealing 11 is also thrown away, so can remove the reason that substandard products take place.

Again, since on large-size units 4, form a plurality of in size unit usefulness peripheral seal 11, size unit adjacent edge one side of peripheral seal 11 during its peristome 111 is located at, therefore in cut-out during size unit 6, but form sealing under the state of attrition process, peristome 111 is towards section simultaneously.Thereby will seal 11 in advance and be formed on the basic

pattern glass plate

1,2, a centering size unit 6 cuts off and just can enter thin plate chemical industry preface to cut off

line

53,54, and manufacturing process carries out easily.

Again,, therefore, carry out thin plateization and also therefore do not cause breakage, mobile device is fallen such impact input etc., not cracky owing to removed fully because of the minute crack of scribing generation.

Fig. 8～Fig. 9 illustrates the 2nd example of implementing the optimal morphology that the present invention uses.Here to the part mark identical label identical with optimal morphology the 1st example.

In the manufacture method of the liquid crystal indicator of this example, changed the thin plate chemical industry preface of unit with respect to the 1st example.

Here the large-size units 4 after the substrate 1 of will cutting into slices is fitted with public substrate 2 is done after the thickness that thin plateization is machined to regulation, the operation of size unit 6 in implementing to be divided into.Promptly increase large-size units 4 wear downs of thickness t 0 operation to thickness t 1.For this reason, for do not allow lapping compound and water enter in the size unit with peripheral seal 11 zone 17 between adjacent, before the substrate 1 of will cutting into slices is fitted with public substrate 2, the size unit is set in the connection with the part sealing 30 of peripheral seal 11 near the outside of large scale sealing 4.But, be used as to major general 1 place in advance in several places (being 4 places here) of applying portion sealing 30 and discharge the peristome 31 that air is used.Can fit like this section substrate 1 and public substrate 2, closed peristome 31 is implemented thin plate processing (attrition process).

Thereby, by sealing 30 of this part or peristome 31 are set, cover the whole big sealing of large-size units 4 with regard to unnecessary formation, the consumption of encapsulant can be restricted to Min..

In addition, size unit 6 and when therefrom size unit 6 (6b) is divided into small size unit 7 from large-size units 4 is divided into, sealing 11 exterior lateral area 11a and part seal 30, peristome 31 owing to cut, so routine identical with the 1st, the substandard products that pollution or crack owing to portion of terminal cause can not take place.

According to this example, then except having the effect same, effect with example the 1st example of the manufacture method of liquid crystal indicator, size unit 6 during thickness in the middle of also large-size units 4 thin plateizations being worked into is divided into again, therefore the processing capacity of the thin plate processing of size unit 6 makes handling ease in reducing.

Again, in the thin plate processing of large-size units 4, the size unit so unnecessary formation covers the big sealing of whole large-size units 4, can be restricted to Min. with the part sealing 30 of peripheral seal 11 with the consumption of encapsulant in the connection owing to be provided with.

Again, above-mentioned example the 1st example, the 2nd example are to implement to cut off with cutting scribing cutter, but also available laser cutting.At this moment, because minute crack takes place hardly, adopt the common chamfering in the divisional plane bight of removing acute angle also passable.

Again, above-mentioned example the 1st example, the 2nd example are to seal printing on the section substrate, but can be imprinted on the public substrate too.

Industrial practicality

As mentioned above, in the manufacture method of liquid crystal indicator of the present invention, owing to the size with basic pattern glass The large-size units of fitting is divided into the middle size unit that contains a plurality of small sizes unit, does under this state Be divided into small size unit 7 after the thin plate processing, so the grinding size middle size littler than large-size units The unit carries out thin plate processing easily, only just finishes thin plate chemical industry order 1 time. In addition, in the thin plate chemical industry order The peripheral part that comprises foreign matter is thrown away. Therefore, can more effectively implement the grinding step of thin plate, simultaneously not Pollution is formed at inboard portion of terminal, and the crack that might betide the exterior lateral area of sealing is also thrown away, so Can remove the reason that substandard products take place. As a result, just can produce at low cost liquid crystal towards slim mobile device Showing device, by the reducer crystal device, can the attenuate mobile device.

Again owing to remove the minute crack that takes place because of scribing fully, so carry out thin plate processing do not have yet because of This and cause breakage, can obtain the shock input that falls etc. the also mobile device of cracky not.

Claims

1. the manufacture method of a liquid crystal indicator is characterized in that,

Be a pair of basic pattern glass to be implemented as the pre-treatment that liquid crystal display uses and the large-size units of fitting be divided into a plurality ofly,, size unit in this carried out after thin plateization is processed into the thickness of product, be divided into the small size unit of product size as middle size unit.

2. the manufacture method of liquid crystal indicator as claimed in claim 1 is characterized in that,

For size unit peripheral seal in the large-size units execution, to surround the part of size unit in the formation, adjacent edge one side in middle size unit forms the peristome that 1 middle size unit is used with the exhaust of peripheral seal formation at least simultaneously.

3. the manufacture method of liquid crystal indicator as claimed in claim 1 or 2 is characterized in that,

In being divided into, large-size units before the size unit, large-size units is carried out thin plate processing.

4. the manufacture method of liquid crystal indicator as claimed in claim 3 is characterized in that,

Implement the adjacent middle size unit of sealing-in with the sealing of the part between the peripheral seal, simultaneously the peristome used as exhaust of at least 1 place wherein.

5. as the manufacture method of each described liquid crystal indicator in the claim 1 to 4, it is characterized in that,

Implement scribing, with after being divided into the small size unit, carry out chamfer machining to remove the minute crack in the divisional plane bight that takes place because of scribing.

6. as the manufacture method of each described liquid crystal indicator in the claim 1 to 5, it is characterized in that,

Middle size unit is large scale unit to be done 4～12 cut apart, better do 4～9 unit of cutting apart.